Tcl Source Code

.MT
(i.e., an empty string),
but this command returns \fB::\fR for the global namespace
as a convenience to programmers.
.TP
\fBnamespace delete \fR?\fInamespace namespace ...\fR?
.
Each namespace \fInamespace\fR is deleted
and all variables, procedures, and child namespaces
contained in the namespace are deleted.
If a procedure is currently executing inside the namespace,
the namespace will be kept alive until the procedure returns;
however, the namespace is marked to prevent other code from
looking it up by name.
If a namespace does not exist, this command returns an error.
If no namespace names are given, this command does nothing.
.TP
\fBnamespace ensemble\fR \fIsubcommand\fR ?\fIarg ...\fR?
.
Creates and manipulates a command that is formed out of an ensemble of
subcommands.  See the section \fBENSEMBLES\fR below for further

.MT
(i.e., an empty string),
but this command returns \fB::\fR for the global namespace
as a convenience to programmers.
.TP
\fBnamespace delete \fR?\fInamespace namespace ...\fR?
.
Each namespace \fInamespace\fR is deleted and its ensemble commands, child
namespaces, commands, and variables are deleted in that order. Any evaluation
levels using the namespace as the current namespace then use the global
namespace instead.



If a namespace does not exist, this command returns an error.
If no namespace names are given, this command does nothing.
.TP
\fBnamespace ensemble\fR \fIsubcommand\fR ?\fIarg ...\fR?
.
Creates and manipulates a command that is formed out of an ensemble of
subcommands.  See the section \fBENSEMBLES\fR below for further

    void *dummy7;
    void *dummy8;
    int dummy9;
    void *dummy10;
    void *dummy11;
    void *dummy12;
    void *dummy13;

} Tcl_CallFrame;

/*
 *----------------------------------------------------------------------------
 * Information about commands that is returned by Tcl_GetCommandInfo and
 * passed to Tcl_SetCommandInfo. objProc is an objc/objv object-based command
 * function while proc is a traditional Tcl argc/argv string-based function.

    void *dummy7;
    void *dummy8;
    int dummy9;
    void *dummy10;
    void *dummy11;
    void *dummy12;
    void *dummy13;
    void *dummy14;
} Tcl_CallFrame;

/*
 *----------------------------------------------------------------------------
 * Information about commands that is returned by Tcl_GetCommandInfo and
 * passed to Tcl_SetCommandInfo. objProc is an objc/objv object-based command
 * function while proc is a traditional Tcl argc/argv string-based function.

    TclInitLimitSupport(interp);

    /*
     * Initialise the thread-specific data ekeko. Note that the thread's alloc
     * cache was already initialised by the call to alloc the interp struct.
     */

#if TCL_THREADS && defined(USE_THREAD_ALLOC)
    iPtr->allocCache = TclpGetAllocCache();
#else
    iPtr->allocCache = NULL;
#endif
    iPtr->pendingObjDataPtr = NULL;
    iPtr->asyncReadyPtr = TclGetAsyncReadyPtr();
    iPtr->deferredCallbacks = NULL;
................................................................................

	hPtr = Tcl_CreateHashEntry(&iPtr->globalNsPtr->cmdTable,
		cmdInfoPtr->name, &isNew);
	if (isNew) {
	    cmdPtr = ckalloc(sizeof(Command));
	    cmdPtr->hPtr = hPtr;
	    cmdPtr->nsPtr = iPtr->globalNsPtr;

	    cmdPtr->refCount = 1;
	    cmdPtr->cmdEpoch = 0;
	    cmdPtr->compileProc = cmdInfoPtr->compileProc;
	    cmdPtr->proc = TclInvokeObjectCommand;
	    cmdPtr->clientData = cmdPtr;
	    cmdPtr->objProc = cmdInfoPtr->objProc;
	    cmdPtr->objClientData = NULL;
................................................................................
#if !defined(TCL_NO_DEPRECATED) && TCL_MAJOR_VERSION < 9
    Tcl_TraceVar2(interp, "tcl_precision", NULL,
	    TCL_GLOBAL_ONLY|TCL_TRACE_READS|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
	    TclPrecTraceProc, NULL);
#endif /* !TCL_NO_DEPRECATED */
    TclpSetVariables(interp);

#if TCL_THREADS
    /*
     * The existence of the "threaded" element of the tcl_platform array
     * indicates that this particular Tcl shell has been compiled with threads
     * turned on. Using "info exists tcl_platform(threaded)" a Tcl script can
     * introspect on the interpreter level of thread safety.
     */

................................................................................
     *
     * Dismantle the namespace after freeing the iPtr->handle so that each
     * bytecode releases its literals without caring to update the literal
     * table, as it will be freed later in this function without further use.
     */

    TclHandleFree(iPtr->handle);
    TclTeardownNamespace(iPtr->globalNsPtr);

    /*
     * Delete all the hidden commands.
     */

    hTablePtr = iPtr->hiddenCmdTablePtr;
    if (hTablePtr != NULL) {
................................................................................
	    }
	    ckfree(dPtr);
	}
	Tcl_DeleteHashTable(hTablePtr);
	ckfree(hTablePtr);
    }

    /*
     * Pop the root frame pointer and finish deleting the global
     * namespace. The order is important [Bug 1658572].
     */

    if ((iPtr->framePtr != iPtr->rootFramePtr) && !TclInExit()) {
	Tcl_Panic("DeleteInterpProc: popping rootCallFrame with other frames on top");
    }
    Tcl_PopCallFrame(interp);
    ckfree(iPtr->rootFramePtr);
    iPtr->rootFramePtr = NULL;
    Tcl_DeleteNamespace((Tcl_Namespace *) iPtr->globalNsPtr);

    /*
     * Free up the result *after* deleting variables, since variable deletion
     * could have transferred ownership of the result string to Tcl.
     */

    Tcl_FreeResult(interp);
................................................................................
	TclInvalidateNsCmdLookup(nsPtr);
	TclInvalidateNsPath(nsPtr);
    }
    cmdPtr = ckalloc(sizeof(Command));
    Tcl_SetHashValue(hPtr, cmdPtr);
    cmdPtr->hPtr = hPtr;
    cmdPtr->nsPtr = nsPtr;

    cmdPtr->refCount = 1;
    cmdPtr->cmdEpoch = 0;
    cmdPtr->compileProc = NULL;
    cmdPtr->objProc = TclInvokeStringCommand;
    cmdPtr->objClientData = cmdPtr;
    cmdPtr->proc = proc;
    cmdPtr->clientData = clientData;
................................................................................
	/*
         * Make sure namespace doesn't get deallocated.
         */

	cmdPtr->nsPtr->refCount++;

	Tcl_DeleteCommandFromToken(interp, (Tcl_Command) cmdPtr);

	nsPtr = (Namespace *) TclEnsureNamespace(interp,
                (Tcl_Namespace *) cmdPtr->nsPtr);
	TclNsDecrRefCount(cmdPtr->nsPtr);

	if (cmdPtr->flags & CMD_REDEF_IN_PROGRESS) {
	    oldRefPtr = cmdPtr->importRefPtr;
	    cmdPtr->importRefPtr = NULL;
................................................................................
	TclInvalidateNsCmdLookup(nsPtr);
	TclInvalidateNsPath(nsPtr);
    }
    cmdPtr = ckalloc(sizeof(Command));
    Tcl_SetHashValue(hPtr, cmdPtr);
    cmdPtr->hPtr = hPtr;
    cmdPtr->nsPtr = nsPtr;

    cmdPtr->refCount = 1;
    cmdPtr->cmdEpoch = 0;
    cmdPtr->compileProc = NULL;
    cmdPtr->objProc = proc;
    cmdPtr->objClientData = clientData;
    cmdPtr->proc = TclInvokeObjectCommand;
    cmdPtr->clientData = cmdPtr;
................................................................................
     * way it was and report the error.
     */

    result = TclPreventAliasLoop(interp, interp, (Tcl_Command) cmdPtr);
    if (result != TCL_OK) {
	Tcl_DeleteHashEntry(cmdPtr->hPtr);
	cmdPtr->hPtr = oldHPtr;

	cmdPtr->nsPtr = cmdNsPtr;
	goto done;



    }

    /*
     * The list of command exported from the namespace might have changed.
     * However, we do not need to recompute this just yet; next time we need
     * the info will be soon enough. These might refer to the same variable,
     * but that's no big deal.
................................................................................
    cmdPtr->flags |= CMD_IS_DELETED;

    /*
     * Call trace functions for the command being deleted. Then delete its
     * traces.
     */

    cmdPtr->nsPtr->refCount++;

    if (cmdPtr->tracePtr != NULL) {
	CommandTrace *tracePtr;
	CallCommandTraces(iPtr,cmdPtr,NULL,NULL,TCL_TRACE_DELETE);

	/*
	 * Now delete these traces.
	 */
................................................................................
    /*
     * The list of command exported from the namespace might have changed.
     * However, we do not need to recompute this just yet; next time we need
     * the info will be soon enough.
     */

    TclInvalidateNsCmdLookup(cmdPtr->nsPtr);
    TclNsDecrRefCount(cmdPtr->nsPtr);

    /*
     * If the command being deleted has a compile function, increment the
     * interpreter's compileEpoch to invalidate its compiled code. This makes
     * sure that we don't later try to execute old code compiled with
     * command-specific (i.e., inline) bytecodes for the now-deleted command.
     * This field is checked in Tcl_EvalObj and ObjInterpProc, and code whose
................................................................................
     * from a CmdName Tcl object in some ByteCode code sequence. In that case,
     * delay the cleanup until all references are either discarded (when a
     * ByteCode is freed) or replaced by a new reference (when a cached
     * CmdName Command reference is found to be invalid and
     * TclNRExecuteByteCode looks up the command in the command hashtable).
     */


    TclCleanupCommandMacro(cmdPtr);
    return 0;
}
 
/*
 *----------------------------------------------------------------------
 *
................................................................................
    return TCL_OK;
}

static int
EvalObjvCore(
    ClientData data[],
    Tcl_Interp *interp,
    int result)
{
    Command *cmdPtr = NULL, *preCmdPtr = data[0];
    int flags = PTR2INT(data[1]);
    int objc = PTR2INT(data[2]);
    Tcl_Obj **objv = data[3];
    Interp *iPtr = (Interp *) interp;
    Namespace *lookupNsPtr = NULL;
    int enterTracesDone = 0;


    /*
     * Push records for task to be done on return, in INVERSE order. First, if
     * needed, the exception handlers (as they should happen last).
     */

    if (!(flags & TCL_EVAL_NOERR)) {
................................................................................
	 * TODO: Is that a bug?
	 */

	lookupNsPtr = iPtr->lookupNsPtr;
	iPtr->lookupNsPtr = NULL;
    } else if (flags & TCL_EVAL_INVOKE) {
	lookupNsPtr = iPtr->globalNsPtr;

    } else {

	/*
	 * TCL_EVAL_INVOKE was not set: clear rewrite rules
	 */

	TclResetRewriteEnsemble(interp, 1);

	if (flags & TCL_EVAL_GLOBAL) {
	    TEOV_SwitchVarFrame(interp);
	    lookupNsPtr = iPtr->globalNsPtr;

	}
    }

    /*
     * Lookup the Command to dispatch.
     */

................................................................................
	    /*
	     * When it's been deleted, and we're told not to attempt
	     * resolving it ourselves, all we can do is raise an error.
	     */
	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		    "attempt to invoke a deleted command"));
	    Tcl_SetErrorCode(interp, "TCL", "EVAL", "DELETEDCOMMAND", NULL);
	    return TCL_ERROR;

	}
    }
    if (cmdPtr == NULL) {
	cmdPtr = TEOV_LookupCmdFromObj(interp, objv[0], lookupNsPtr);
	if (!cmdPtr) {
	    return TEOV_NotFound(interp, objc, objv, lookupNsPtr);

	}
    }

    if (enterTracesDone || iPtr->tracePtr
	    || (cmdPtr->flags & CMD_HAS_EXEC_TRACES)) {

	Tcl_Obj *commandPtr = TclGetSourceFromFrame(
		flags & TCL_EVAL_SOURCE_IN_FRAME ?  iPtr->cmdFramePtr : NULL,
		objc, objv);
	Tcl_IncrRefCount(commandPtr);

	if (!enterTracesDone) {

	    int code = TEOV_RunEnterTraces(interp, &cmdPtr, commandPtr,
		    objc, objv);

	    /*
	     * Send any exception from enter traces back as an exception
	     * raised by the traced command.
	     * TODO: Is this a bug?  Letting an execution trace BREAK or
	     * CONTINUE or RETURN in the place of the traced command?
	     * Would either converting all exceptions to TCL_ERROR, or
	     * just swallowing them be better?  (Swallowing them has the
	     * problem of permanently hiding program errors.)
	     */

	    if (code != TCL_OK) {
		Tcl_DecrRefCount(commandPtr);
		return code;
	    }

	    /*
	     * If the enter traces made the resolved cmdPtr unusable, go
	     * back and resolve again, but next time don't run enter
	     * traces again.
	     */
................................................................................
	TclNRAddCallback(interp, TEOV_RunLeaveTraces, INT2PTR(objc),
		    commandPtr, cmdPtr, objv);
    }

    TclNRAddCallback(interp, Dispatch,
	    cmdPtr->nreProc ? cmdPtr->nreProc : cmdPtr->objProc,
	    cmdPtr->objClientData, INT2PTR(objc), objv);







    return TCL_OK;
}

static int
Dispatch(
    ClientData data[],
    Tcl_Interp *interp,
    int result)
................................................................................
    iPtr->numLevels--;

     /*
      * If there is a tailcall, schedule it next
      */

    if (data[1] && (data[1] != INT2PTR(1))) {
        TclNRAddCallback(interp, TclNRTailcallEval, data[1], NULL, NULL, NULL);
    }

    /* OPT ??
     * Do not interrupt a series of cleanups with async or limit checks:
     * just check at the end?
     */

................................................................................
	TclStackFree(interp, newObjv);
	return TCL_ERROR;
    }

    if (lookupNsPtr) {
	savedNsPtr = varFramePtr->nsPtr;
	varFramePtr->nsPtr = lookupNsPtr;


    }
    TclSkipTailcall(interp);
    TclNRAddCallback(interp, TEOV_NotFoundCallback, INT2PTR(handlerObjc),
	    newObjv, savedNsPtr, NULL);
    return TclNREvalObjv(interp, newObjc, newObjv, TCL_EVAL_NOERR, NULL);
}

................................................................................
    int objc = PTR2INT(data[0]);
    Tcl_Obj **objv = data[1];
    Namespace *savedNsPtr = data[2];

    int i;

    if (savedNsPtr) {

	iPtr->varFramePtr->nsPtr = savedNsPtr;
    }

    /*
     * Release any resources we locked and allocated during the handler call.
     */

................................................................................
 *
 *----------------------------------------------------------------------
 */

void
TclSetTailcall(
    Tcl_Interp *interp,

    Tcl_Obj *listPtr)

{
    /*
     * Find the splicing spot: right before the NRCommand of the thing
     * being tailcalled. Note that we skip NRCommands marked by a 1 in data[1]
     * (used by command redirectors).
     */

................................................................................
            break;
        }
    }
    if (!runPtr) {
        Tcl_Panic("tailcall cannot find the right splicing spot: should not happen!");
    }
    runPtr->data[1] = listPtr;



}
 
/*
 *----------------------------------------------------------------------
 *
 * TclNRTailcallObjCmd --
 *
................................................................................
    }

    /*
     * Invocation without args just clears a scheduled tailcall; invocation
     * with an argument replaces any previously scheduled tailcall.
     */

    if (iPtr->varFramePtr->tailcallPtr) {


        Tcl_DecrRefCount(iPtr->varFramePtr->tailcallPtr);
        iPtr->varFramePtr->tailcallPtr = NULL;
    }

    /*
     * Create the callback to actually evaluate the tailcalled
     * command, then set it in the varFrame so that PopCallFrame can use it
     * at the proper time.
     */

    if (objc > 1) {
        Tcl_Obj *listPtr, *nsObjPtr;
        Tcl_Namespace *nsPtr = (Tcl_Namespace *) iPtr->varFramePtr->nsPtr;

        /* The tailcall data is in a Tcl list: the first element is the
         * namespace, the rest the command to be tailcalled. */

        nsObjPtr = Tcl_NewStringObj(nsPtr->fullName, -1);
        listPtr = Tcl_NewListObj(objc, objv);
 	TclListObjSetElement(interp, listPtr, 0, nsObjPtr);

        iPtr->varFramePtr->tailcallPtr = listPtr;
    }
    return TCL_RETURN;
}
 
/*
 *----------------------------------------------------------------------
 *
................................................................................
int
TclNRTailcallEval(
    ClientData data[],
    Tcl_Interp *interp,
    int result)
{
    Interp *iPtr = (Interp *) interp;
    Tcl_Obj *listPtr = data[0], *nsObjPtr;
    Tcl_Namespace *nsPtr;
    int objc;
    Tcl_Obj **objv;

    Tcl_ListObjGetElements(interp, listPtr, &objc, &objv);
    nsObjPtr = objv[0];

    if (result == TCL_OK) {
	result = TclGetNamespaceFromObj(interp, nsObjPtr, &nsPtr);
    }

    if (result != TCL_OK) {
        /*
         * Tailcall execution was preempted, eg by an intervening catch or by
         * a now-gone namespace: cleanup and return.
         */

	Tcl_DecrRefCount(listPtr);
        return result;
    }

    /*
     * Perform the tailcall
     */

    TclMarkTailcall(interp);
    TclNRAddCallback(interp, TclNRReleaseValues, listPtr, NULL, NULL,NULL);


    iPtr->lookupNsPtr = (Namespace *) nsPtr;

    return TclNREvalObjv(interp, objc-1, objv+1, 0, NULL);
}

int
TclNRReleaseValues(
    ClientData data[],
    Tcl_Interp *interp,
    int result)
................................................................................
int
TclNRYieldToObjCmd(
    ClientData clientData,
    Tcl_Interp *interp,
    int objc,
    Tcl_Obj *const objv[])
{
    CoroutineData *corPtr = iPtr->execEnvPtr->corPtr;
    Tcl_Obj *listPtr, *nsObjPtr;
    Tcl_Namespace *nsPtr = TclGetCurrentNamespace(interp);

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "command ?arg ...?");
	return TCL_ERROR;
    }

    if (!corPtr) {
	Tcl_SetObjResult(interp, Tcl_NewStringObj(
                "yieldto can only be called in a coroutine", -1));
	Tcl_SetErrorCode(interp, "TCL", "COROUTINE", "ILLEGAL_YIELD", NULL);
	return TCL_ERROR;
    }

    if (((Namespace *) nsPtr)->flags & NS_DYING) {
        Tcl_SetObjResult(interp, Tcl_NewStringObj(
		"yieldto called in deleted namespace", -1));
        Tcl_SetErrorCode(interp, "TCL", "COROUTINE", "YIELDTO_IN_DELETED",
		NULL);
        return TCL_ERROR;
    }

    /*
     * Add the tailcall in the caller env, then just yield.
     *
     * This is essentially code from TclNRTailcallObjCmd
     */

    listPtr = Tcl_NewListObj(objc, objv);
    nsObjPtr = Tcl_NewStringObj(nsPtr->fullName, -1);
    TclListObjSetElement(interp, listPtr, 0, nsObjPtr);

    /*
     * Add the callback in the caller's env, then instruct TEBC to yield.
     */

    iPtr->execEnvPtr = corPtr->callerEEPtr;
    TclSetTailcall(interp, listPtr);
    iPtr->execEnvPtr = corPtr->eePtr;

    return TclNRYieldObjCmd(INT2PTR(CORO_ACTIVATE_YIELDM), interp, 1, objv);
}
 
static int
RewindCoroutineCallback(
................................................................................
    NRE_ASSERT(TOP_CB(interp) == NULL);
    NRE_ASSERT(iPtr->execEnvPtr == corPtr->eePtr);
    NRE_ASSERT(!COR_IS_SUSPENDED(corPtr));
    NRE_ASSERT((corPtr->callerEEPtr->callbackPtr->procPtr == NRCoroutineCallerCallback));

    cmdPtr->deleteProc = NULL;
    Tcl_DeleteCommandFromToken(interp, (Tcl_Command) cmdPtr);


    TclCleanupCommandMacro(cmdPtr);

    corPtr->eePtr->corPtr = NULL;
    TclDeleteExecEnv(corPtr->eePtr);
    corPtr->eePtr = NULL;

    corPtr->stackLevel = NULL;
................................................................................
    iPtr->execEnvPtr = corPtr->eePtr;

    TclNRAddCallback(interp, NRCoroutineExitCallback, corPtr,
	    NULL, NULL, NULL);

    /* ensure that the command is looked up in the correct namespace */
    iPtr->lookupNsPtr = lookupNsPtr;

    Tcl_NREvalObj(interp, Tcl_NewListObj(objc-2, objv+2), 0);
    iPtr->numLevels--;

    SAVE_CONTEXT(corPtr->running);
    RESTORE_CONTEXT(corPtr->caller);
    iPtr->execEnvPtr = corPtr->callerEEPtr;

    TclInitLimitSupport(interp);

    /*
     * Initialise the thread-specific data ekeko. Note that the thread's alloc
     * cache was already initialised by the call to alloc the interp struct.
     */

#if (!defined(TCL_THREADS) || TCL_THREADS) && defined(USE_THREAD_ALLOC)
    iPtr->allocCache = TclpGetAllocCache();
#else
    iPtr->allocCache = NULL;
#endif
    iPtr->pendingObjDataPtr = NULL;
    iPtr->asyncReadyPtr = TclGetAsyncReadyPtr();
    iPtr->deferredCallbacks = NULL;
................................................................................

	hPtr = Tcl_CreateHashEntry(&iPtr->globalNsPtr->cmdTable,
		cmdInfoPtr->name, &isNew);
	if (isNew) {
	    cmdPtr = ckalloc(sizeof(Command));
	    cmdPtr->hPtr = hPtr;
	    cmdPtr->nsPtr = iPtr->globalNsPtr;
	    iPtr->globalNsPtr->refCount++;
	    cmdPtr->refCount = 1;
	    cmdPtr->cmdEpoch = 0;
	    cmdPtr->compileProc = cmdInfoPtr->compileProc;
	    cmdPtr->proc = TclInvokeObjectCommand;
	    cmdPtr->clientData = cmdPtr;
	    cmdPtr->objProc = cmdInfoPtr->objProc;
	    cmdPtr->objClientData = NULL;
................................................................................
#if !defined(TCL_NO_DEPRECATED) && TCL_MAJOR_VERSION < 9
    Tcl_TraceVar2(interp, "tcl_precision", NULL,
	    TCL_GLOBAL_ONLY|TCL_TRACE_READS|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
	    TclPrecTraceProc, NULL);
#endif /* !TCL_NO_DEPRECATED */
    TclpSetVariables(interp);

#if !defined(TCL_THREADS) || TCL_THREADS
    /*
     * The existence of the "threaded" element of the tcl_platform array
     * indicates that this particular Tcl shell has been compiled with threads
     * turned on. Using "info exists tcl_platform(threaded)" a Tcl script can
     * introspect on the interpreter level of thread safety.
     */

................................................................................
     *
     * Dismantle the namespace after freeing the iPtr->handle so that each
     * bytecode releases its literals without caring to update the literal
     * table, as it will be freed later in this function without further use.
     */

    TclHandleFree(iPtr->handle);
    Tcl_DeleteNamespace((Tcl_Namespace *)iPtr->globalNsPtr);

    /*
     * Delete all the hidden commands.
     */

    hTablePtr = iPtr->hiddenCmdTablePtr;
    if (hTablePtr != NULL) {
................................................................................
	    }
	    ckfree(dPtr);
	}
	Tcl_DeleteHashTable(hTablePtr);
	ckfree(hTablePtr);
    }






    if ((iPtr->framePtr != iPtr->rootFramePtr) && !TclInExit()) {
	Tcl_Panic("DeleteInterpProc: popping rootCallFrame with other frames on top");
    }
    Tcl_PopCallFrame(interp);
    ckfree(iPtr->rootFramePtr);
    iPtr->rootFramePtr = NULL;


    /*
     * Free up the result *after* deleting variables, since variable deletion
     * could have transferred ownership of the result string to Tcl.
     */

    Tcl_FreeResult(interp);
................................................................................
	TclInvalidateNsCmdLookup(nsPtr);
	TclInvalidateNsPath(nsPtr);
    }
    cmdPtr = ckalloc(sizeof(Command));
    Tcl_SetHashValue(hPtr, cmdPtr);
    cmdPtr->hPtr = hPtr;
    cmdPtr->nsPtr = nsPtr;
    nsPtr->refCount++;
    cmdPtr->refCount = 1;
    cmdPtr->cmdEpoch = 0;
    cmdPtr->compileProc = NULL;
    cmdPtr->objProc = TclInvokeStringCommand;
    cmdPtr->objClientData = cmdPtr;
    cmdPtr->proc = proc;
    cmdPtr->clientData = clientData;
................................................................................
	/*
         * Make sure namespace doesn't get deallocated.
         */

	cmdPtr->nsPtr->refCount++;

	Tcl_DeleteCommandFromToken(interp, (Tcl_Command) cmdPtr);

	nsPtr = (Namespace *) TclEnsureNamespace(interp,
                (Tcl_Namespace *) cmdPtr->nsPtr);
	TclNsDecrRefCount(cmdPtr->nsPtr);

	if (cmdPtr->flags & CMD_REDEF_IN_PROGRESS) {
	    oldRefPtr = cmdPtr->importRefPtr;
	    cmdPtr->importRefPtr = NULL;
................................................................................
	TclInvalidateNsCmdLookup(nsPtr);
	TclInvalidateNsPath(nsPtr);
    }
    cmdPtr = ckalloc(sizeof(Command));
    Tcl_SetHashValue(hPtr, cmdPtr);
    cmdPtr->hPtr = hPtr;
    cmdPtr->nsPtr = nsPtr;
    nsPtr->refCount++;
    cmdPtr->refCount = 1;
    cmdPtr->cmdEpoch = 0;
    cmdPtr->compileProc = NULL;
    cmdPtr->objProc = proc;
    cmdPtr->objClientData = clientData;
    cmdPtr->proc = TclInvokeObjectCommand;
    cmdPtr->clientData = cmdPtr;
................................................................................
     * way it was and report the error.
     */

    result = TclPreventAliasLoop(interp, interp, (Tcl_Command) cmdPtr);
    if (result != TCL_OK) {
	Tcl_DeleteHashEntry(cmdPtr->hPtr);
	cmdPtr->hPtr = oldHPtr;
	/* reference count was already incremented above */
	cmdPtr->nsPtr = cmdNsPtr;
	goto done;
    } else {
	cmdPtr->nsPtr->refCount++;
	TclNsDecrRefCount(cmdNsPtr);
    }

    /*
     * The list of command exported from the namespace might have changed.
     * However, we do not need to recompute this just yet; next time we need
     * the info will be soon enough. These might refer to the same variable,
     * but that's no big deal.
................................................................................
    cmdPtr->flags |= CMD_IS_DELETED;

    /*
     * Call trace functions for the command being deleted. Then delete its
     * traces.
     */



    if (cmdPtr->tracePtr != NULL) {
	CommandTrace *tracePtr;
	CallCommandTraces(iPtr,cmdPtr,NULL,NULL,TCL_TRACE_DELETE);

	/*
	 * Now delete these traces.
	 */
................................................................................
    /*
     * The list of command exported from the namespace might have changed.
     * However, we do not need to recompute this just yet; next time we need
     * the info will be soon enough.
     */

    TclInvalidateNsCmdLookup(cmdPtr->nsPtr);


    /*
     * If the command being deleted has a compile function, increment the
     * interpreter's compileEpoch to invalidate its compiled code. This makes
     * sure that we don't later try to execute old code compiled with
     * command-specific (i.e., inline) bytecodes for the now-deleted command.
     * This field is checked in Tcl_EvalObj and ObjInterpProc, and code whose
................................................................................
     * from a CmdName Tcl object in some ByteCode code sequence. In that case,
     * delay the cleanup until all references are either discarded (when a
     * ByteCode is freed) or replaced by a new reference (when a cached
     * CmdName Command reference is found to be invalid and
     * TclNRExecuteByteCode looks up the command in the command hashtable).
     */

    TclNsDecrRefCount(cmdPtr->nsPtr);
    TclCleanupCommandMacro(cmdPtr);
    return 0;
}
 
/*
 *----------------------------------------------------------------------
 *
................................................................................
    return TCL_OK;
}

static int
EvalObjvCore(
    ClientData data[],
    Tcl_Interp *interp,
    int result)		    /* ignored */
{
    Command *cmdPtr = NULL, *preCmdPtr = data[0];
    int flags = PTR2INT(data[1]);
    int objc = PTR2INT(data[2]);
    Tcl_Obj **objv = data[3];
    Interp *iPtr = (Interp *) interp;
    Namespace *lookupNsPtr = NULL;
    int enterTracesDone = 0;
    result = TCL_OK;

    /*
     * Push records for task to be done on return, in INVERSE order. First, if
     * needed, the exception handlers (as they should happen last).
     */

    if (!(flags & TCL_EVAL_NOERR)) {
................................................................................
	 * TODO: Is that a bug?
	 */

	lookupNsPtr = iPtr->lookupNsPtr;
	iPtr->lookupNsPtr = NULL;
    } else if (flags & TCL_EVAL_INVOKE) {
	lookupNsPtr = iPtr->globalNsPtr;
	lookupNsPtr->refCount++;
    } else {

	/*
	 * TCL_EVAL_INVOKE was not set: clear rewrite rules
	 */

	TclResetRewriteEnsemble(interp, 1);

	if (flags & TCL_EVAL_GLOBAL) {
	    TEOV_SwitchVarFrame(interp);
	    lookupNsPtr = iPtr->globalNsPtr;
	    lookupNsPtr->refCount++;
	}
    }

    /*
     * Lookup the Command to dispatch.
     */

................................................................................
	    /*
	     * When it's been deleted, and we're told not to attempt
	     * resolving it ourselves, all we can do is raise an error.
	     */
	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		    "attempt to invoke a deleted command"));
	    Tcl_SetErrorCode(interp, "TCL", "EVAL", "DELETEDCOMMAND", NULL);
	    result = TCL_ERROR;
	    goto cleanup;
	}
    }
    if (cmdPtr == NULL) {
	cmdPtr = TEOV_LookupCmdFromObj(interp, objv[0], lookupNsPtr);
	if (!cmdPtr) {
	    result = TEOV_NotFound(interp, objc, objv, lookupNsPtr);
	    goto cleanup;
	}
    }

    if (enterTracesDone || iPtr->tracePtr
	    || (cmdPtr->flags & CMD_HAS_EXEC_TRACES)) {

	Tcl_Obj *commandPtr = TclGetSourceFromFrame(
		flags & TCL_EVAL_SOURCE_IN_FRAME ?  iPtr->cmdFramePtr : NULL,
		objc, objv);
	Tcl_IncrRefCount(commandPtr);

	if (!enterTracesDone) {

	    result = TEOV_RunEnterTraces(interp, &cmdPtr, commandPtr,
		    objc, objv);

	    /*
	     * Send any exception from enter traces back as an exception
	     * raised by the traced command.
	     * TODO: Is this a bug?  Letting an execution trace BREAK or
	     * CONTINUE or RETURN in the place of the traced command?
	     * Would either converting all exceptions to TCL_ERROR, or
	     * just swallowing them be better?  (Swallowing them has the
	     * problem of permanently hiding program errors.)
	     */

	    if (result != TCL_OK) {
		Tcl_DecrRefCount(commandPtr);
		goto cleanup;
	    }

	    /*
	     * If the enter traces made the resolved cmdPtr unusable, go
	     * back and resolve again, but next time don't run enter
	     * traces again.
	     */
................................................................................
	TclNRAddCallback(interp, TEOV_RunLeaveTraces, INT2PTR(objc),
		    commandPtr, cmdPtr, objv);
    }

    TclNRAddCallback(interp, Dispatch,
	    cmdPtr->nreProc ? cmdPtr->nreProc : cmdPtr->objProc,
	    cmdPtr->objClientData, INT2PTR(objc), objv);

cleanup:

    if (lookupNsPtr) {
	TclNsDecrRefCount(lookupNsPtr);
    }

    return result;
}

static int
Dispatch(
    ClientData data[],
    Tcl_Interp *interp,
    int result)
................................................................................
    iPtr->numLevels--;

     /*
      * If there is a tailcall, schedule it next
      */

    if (data[1] && (data[1] != INT2PTR(1))) {
        TclNRAddCallback(interp, TclNRTailcallEval, data[1], data[2], NULL, NULL);
    }

    /* OPT ??
     * Do not interrupt a series of cleanups with async or limit checks:
     * just check at the end?
     */

................................................................................
	TclStackFree(interp, newObjv);
	return TCL_ERROR;
    }

    if (lookupNsPtr) {
	savedNsPtr = varFramePtr->nsPtr;
	varFramePtr->nsPtr = lookupNsPtr;
	/* Corresponding TclNsDecrRefCount is in TEOV_NotFoundCallback. */
	varFramePtr->nsPtr->refCount++;
    }
    TclSkipTailcall(interp);
    TclNRAddCallback(interp, TEOV_NotFoundCallback, INT2PTR(handlerObjc),
	    newObjv, savedNsPtr, NULL);
    return TclNREvalObjv(interp, newObjc, newObjv, TCL_EVAL_NOERR, NULL);
}

................................................................................
    int objc = PTR2INT(data[0]);
    Tcl_Obj **objv = data[1];
    Namespace *savedNsPtr = data[2];

    int i;

    if (savedNsPtr) {
	TclNsDecrRefCount(iPtr->varFramePtr->nsPtr);
	iPtr->varFramePtr->nsPtr = savedNsPtr;
    }

    /*
     * Release any resources we locked and allocated during the handler call.
     */

................................................................................
 *
 *----------------------------------------------------------------------
 */

void
TclSetTailcall(
    Tcl_Interp *interp,
    Namespace *nsPtr,
    Tcl_Obj *listPtr
    )
{
    /*
     * Find the splicing spot: right before the NRCommand of the thing
     * being tailcalled. Note that we skip NRCommands marked by a 1 in data[1]
     * (used by command redirectors).
     */

................................................................................
            break;
        }
    }
    if (!runPtr) {
        Tcl_Panic("tailcall cannot find the right splicing spot: should not happen!");
    }
    runPtr->data[1] = listPtr;
    runPtr->data[2] = nsPtr;
    /* Corresponding TclNsDecrRefCount is in EvalObjvCore */
    nsPtr->refCount++;
}
 
/*
 *----------------------------------------------------------------------
 *
 * TclNRTailcallObjCmd --
 *
................................................................................
    }

    /*
     * Invocation without args just clears a scheduled tailcall; invocation
     * with an argument replaces any previously scheduled tailcall.
     */

    if (iPtr->varFramePtr->tailcallNsPtr) {
        TclNsDecrRefCount(iPtr->varFramePtr->tailcallNsPtr);
        iPtr->varFramePtr->tailcallNsPtr = NULL;
        Tcl_DecrRefCount(iPtr->varFramePtr->tailcallCmdPtr);
        iPtr->varFramePtr->tailcallCmdPtr = NULL;
    }

    /*
     * Create the callback to actually evaluate the tailcalled
     * command, then set it in the varFrame so that Tcl_PopCallFrame can use it
     * at the proper time.
     */

    if (objc > 1) {
        iPtr->varFramePtr->tailcallNsPtr = iPtr->varFramePtr->nsPtr;
	iPtr->varFramePtr->tailcallNsPtr->refCount++;








        iPtr->varFramePtr->tailcallCmdPtr = Tcl_NewListObj(objc-1, objv+1);
    }
    return TCL_RETURN;
}
 
/*
 *----------------------------------------------------------------------
 *
................................................................................
int
TclNRTailcallEval(
    ClientData data[],
    Tcl_Interp *interp,
    int result)
{
    Interp *iPtr = (Interp *) interp;
    Tcl_Obj *listPtr = data[0];
    Tcl_Namespace *nsPtr = data[1];
    int objc;
    Tcl_Obj **objv;

    Tcl_ListObjGetElements(interp, listPtr, &objc, &objv);
















    /*
     * Perform the tailcall
     */

    TclMarkTailcall(interp);
    TclNRAddCallback(interp, TclNRReleaseValues, listPtr, NULL, NULL,NULL);

    /* Reference count already incremented in TclSetTailcall. */
    iPtr->lookupNsPtr = (Namespace *) nsPtr;

    return TclNREvalObjv(interp, objc, objv, 0, NULL);
}

int
TclNRReleaseValues(
    ClientData data[],
    Tcl_Interp *interp,
    int result)
................................................................................
int
TclNRYieldToObjCmd(
    ClientData clientData,
    Tcl_Interp *interp,
    int objc,
    Tcl_Obj *const objv[])
{
    Tcl_Obj *listPtr;
    CoroutineData *corPtr = iPtr->execEnvPtr->corPtr;
    Namespace *nsPtr = (Namespace *)TclGetCurrentNamespace(interp);

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "command ?arg ...?");
	return TCL_ERROR;
    }

    if (!corPtr) {
	Tcl_SetObjResult(interp, Tcl_NewStringObj(
                "yieldto can only be called in a coroutine", -1));
	Tcl_SetErrorCode(interp, "TCL", "COROUTINE", "ILLEGAL_YIELD", NULL);
	return TCL_ERROR;
    }









    /*
     * Add the tailcall in the caller env, then just yield.
     *
     * This is essentially code from TclNRTailcallObjCmd
     */

    listPtr = Tcl_NewListObj(objc-1, objv+1);



    /*
     * Add the callback in the caller's env, then instruct TEBC to yield.
     */

    iPtr->execEnvPtr = corPtr->callerEEPtr;
    TclSetTailcall(interp, nsPtr, listPtr);
    iPtr->execEnvPtr = corPtr->eePtr;

    return TclNRYieldObjCmd(INT2PTR(CORO_ACTIVATE_YIELDM), interp, 1, objv);
}
 
static int
RewindCoroutineCallback(
................................................................................
    NRE_ASSERT(TOP_CB(interp) == NULL);
    NRE_ASSERT(iPtr->execEnvPtr == corPtr->eePtr);
    NRE_ASSERT(!COR_IS_SUSPENDED(corPtr));
    NRE_ASSERT((corPtr->callerEEPtr->callbackPtr->procPtr == NRCoroutineCallerCallback));

    cmdPtr->deleteProc = NULL;
    Tcl_DeleteCommandFromToken(interp, (Tcl_Command) cmdPtr);

    /* Corresponding cmdPtr->refCount ++ is in TclNRCoroutineObjCmd */ 
    TclCleanupCommandMacro(cmdPtr);

    corPtr->eePtr->corPtr = NULL;
    TclDeleteExecEnv(corPtr->eePtr);
    corPtr->eePtr = NULL;

    corPtr->stackLevel = NULL;
................................................................................
    iPtr->execEnvPtr = corPtr->eePtr;

    TclNRAddCallback(interp, NRCoroutineExitCallback, corPtr,
	    NULL, NULL, NULL);

    /* ensure that the command is looked up in the correct namespace */
    iPtr->lookupNsPtr = lookupNsPtr;
    lookupNsPtr->refCount++;
    Tcl_NREvalObj(interp, Tcl_NewListObj(objc-2, objv+2), 0);
    iPtr->numLevels--;

    SAVE_CONTEXT(corPtr->running);
    RESTORE_CONTEXT(corPtr->caller);
    iPtr->execEnvPtr = corPtr->callerEEPtr;

    int i;

    if (parsePtr->numWords < 2 || parsePtr->numWords > 256
	    || envPtr->procPtr == NULL) {
	return TCL_ERROR;
    }

    /* make room for the nsObjPtr */
    /* TODO: Doesn't this have to be a known value? */
    CompileWord(envPtr, tokenPtr, interp, 0);
    for (i=1 ; i<parsePtr->numWords ; i++) {
	tokenPtr = TokenAfter(tokenPtr);
	CompileWord(envPtr, tokenPtr, interp, i);
    }
    TclEmitInstInt1(	INST_TAILCALL, parsePtr->numWords,	envPtr);
    return TCL_OK;
}
 
/*
 *----------------------------------------------------------------------
 *
 * TclCompileThrowCmd --
................................................................................
    Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr);
    int i;

    if (parsePtr->numWords < 2) {
	return TCL_ERROR;
    }

    OP(		NS_CURRENT);
    for (i = 1 ; i < parsePtr->numWords ; i++) {
	CompileWord(envPtr, tokenPtr, interp, i);
	tokenPtr = TokenAfter(tokenPtr);
    }
    OP4(	LIST, i);
    OP(		YIELD_TO_INVOKE);
    return TCL_OK;
}
 
/*
 *----------------------------------------------------------------------
 *

    int i;

    if (parsePtr->numWords < 2 || parsePtr->numWords > 256
	    || envPtr->procPtr == NULL) {
	return TCL_ERROR;
    }




    for (i=1 ; i<parsePtr->numWords ; i++) {
	tokenPtr = TokenAfter(tokenPtr);
	CompileWord(envPtr, tokenPtr, interp, i);
    }
    TclEmitInstInt1(	INST_TAILCALL, parsePtr->numWords - 1,	envPtr);
    return TCL_OK;
}
 
/*
 *----------------------------------------------------------------------
 *
 * TclCompileThrowCmd --
................................................................................
    Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr);
    int i;

    if (parsePtr->numWords < 2) {
	return TCL_ERROR;
    }


    for (i = 1 ; i < parsePtr->numWords ; i++) {
	CompileWord(envPtr, tokenPtr, interp, i);
	tokenPtr = TokenAfter(tokenPtr);
    }
    OP4(	LIST, i-1);
    OP(		YIELD_TO_INVOKE);
    return TCL_OK;
}
 
/*
 *----------------------------------------------------------------------
 *

    }

    if (codePtr->localCachePtr && (--codePtr->localCachePtr->refCount == 0)) {
	TclFreeLocalCache(interp, codePtr->localCachePtr);
    }

    TclHandleRelease(codePtr->interpHandle);

    ckfree(codePtr);
}
 
/*
 * ---------------------------------------------------------------------
 *
 * IsCompactibleCompileEnv --
................................................................................
    }

    p = ckalloc(structureSize);
    codePtr = (ByteCode *) p;
    codePtr->interpHandle = TclHandlePreserve(iPtr->handle);
    codePtr->compileEpoch = iPtr->compileEpoch;
    codePtr->nsPtr = namespacePtr;

    codePtr->nsEpoch = namespacePtr->resolverEpoch;
    codePtr->refCount = 0;
    TclPreserveByteCode(codePtr);
    if (namespacePtr->compiledVarResProc || iPtr->resolverPtr) {
	codePtr->flags = TCL_BYTECODE_RESOLVE_VARS;
    } else {
	codePtr->flags = 0;

    }

    if (codePtr->localCachePtr && (--codePtr->localCachePtr->refCount == 0)) {
	TclFreeLocalCache(interp, codePtr->localCachePtr);
    }

    TclHandleRelease(codePtr->interpHandle);
    TclNsDecrRefCount(codePtr->nsPtr);
    ckfree(codePtr);
}
 
/*
 * ---------------------------------------------------------------------
 *
 * IsCompactibleCompileEnv --
................................................................................
    }

    p = ckalloc(structureSize);
    codePtr = (ByteCode *) p;
    codePtr->interpHandle = TclHandlePreserve(iPtr->handle);
    codePtr->compileEpoch = iPtr->compileEpoch;
    codePtr->nsPtr = namespacePtr;
    codePtr->nsPtr->refCount++;
    codePtr->nsEpoch = namespacePtr->resolverEpoch;
    codePtr->refCount = 0;
    TclPreserveByteCode(codePtr);
    if (namespacePtr->compiledVarResProc || iPtr->resolverPtr) {
	codePtr->flags = TCL_BYTECODE_RESOLVE_VARS;
    } else {
	codePtr->flags = 0;

	    *foundNsPtr, *altFoundNsPtr, *actualCxtPtr;
    Tcl_Command token;
    Tcl_DictSearch search;
    Tcl_Obj *listObj;
    const char *simpleName;
    int index, done;

    if (nsPtr == NULL || nsPtr->flags & NS_DYING) {
	if (!Tcl_InterpDeleted(interp)) {
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "tried to manipulate ensemble of deleted namespace",
		    -1));
	    Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "DEAD", NULL);
	}
	return TCL_ERROR;
................................................................................
	TclDStringAppendLiteral(&buf, "subcommand ?arg ...?");
	Tcl_WrongNumArgs(interp, 1, objv, Tcl_DStringValue(&buf));
	Tcl_DStringFree(&buf);

	return TCL_ERROR;
    }

    if (ensemblePtr->nsPtr->flags & NS_DYING) {
	/*
	 * Don't know how we got here, but make things give up quickly.
	 */

	if (!Tcl_InterpDeleted(interp)) {
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "ensemble activated for deleted namespace", -1));
................................................................................
	/*
	 * Hand off to the target command.
	 */

	TclSkipTailcall(interp);
	Tcl_ListObjGetElements(NULL, copyPtr, &copyObjc, &copyObjv);
	((Interp *)interp)->lookupNsPtr = ensemblePtr->nsPtr;

	return TclNREvalObjv(interp, copyObjc, copyObjv, TCL_EVAL_INVOKE, NULL);
    }

  unknownOrAmbiguousSubcommand:
    /*
     * Have not been able to match the subcommand asked for with a real
     * subcommand that we export. See whether a handler has been registered

	    *foundNsPtr, *altFoundNsPtr, *actualCxtPtr;
    Tcl_Command token;
    Tcl_DictSearch search;
    Tcl_Obj *listObj;
    const char *simpleName;
    int index, done;

    if (nsPtr == NULL || nsPtr->flags & NS_DEAD) {
	if (!Tcl_InterpDeleted(interp)) {
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "tried to manipulate ensemble of deleted namespace",
		    -1));
	    Tcl_SetErrorCode(interp, "TCL", "ENSEMBLE", "DEAD", NULL);
	}
	return TCL_ERROR;
................................................................................
	TclDStringAppendLiteral(&buf, "subcommand ?arg ...?");
	Tcl_WrongNumArgs(interp, 1, objv, Tcl_DStringValue(&buf));
	Tcl_DStringFree(&buf);

	return TCL_ERROR;
    }

    if (ensemblePtr->nsPtr->flags & NS_DEAD) {
	/*
	 * Don't know how we got here, but make things give up quickly.
	 */

	if (!Tcl_InterpDeleted(interp)) {
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "ensemble activated for deleted namespace", -1));
................................................................................
	/*
	 * Hand off to the target command.
	 */

	TclSkipTailcall(interp);
	Tcl_ListObjGetElements(NULL, copyPtr, &copyObjc, &copyObjv);
	((Interp *)interp)->lookupNsPtr = ensemblePtr->nsPtr;
	ensemblePtr->nsPtr->refCount++;
	return TclNREvalObjv(interp, copyObjc, copyObjv, TCL_EVAL_INVOKE, NULL);
    }

  unknownOrAmbiguousSubcommand:
    /*
     * Have not been able to match the subcommand asked for with a real
     * subcommand that we export. See whether a handler has been registered

	    fflush(stdout);
	}
#endif
	yieldParameter = 0;
	Tcl_SetObjResult(interp, OBJ_AT_TOS);
	goto doYield;

    case INST_YIELD_TO_INVOKE:

	corPtr = iPtr->execEnvPtr->corPtr;
	valuePtr = OBJ_AT_TOS;
	if (!corPtr) {
	    TRACE(("[%.30s] => ERROR: yield outside coroutine\n",
		    O2S(valuePtr)));
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "yieldto can only be called in a coroutine", -1));
	    DECACHE_STACK_INFO();
	    Tcl_SetErrorCode(interp, "TCL", "COROUTINE", "ILLEGAL_YIELD",
		    NULL);
	    CACHE_STACK_INFO();
	    goto gotError;
	}
	if (((Namespace *)TclGetCurrentNamespace(interp))->flags & NS_DYING) {
	    TRACE(("[%.30s] => ERROR: yield in deleted\n",
		    O2S(valuePtr)));
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "yieldto called in deleted namespace", -1));
	    DECACHE_STACK_INFO();
	    Tcl_SetErrorCode(interp, "TCL", "COROUTINE", "YIELDTO_IN_DELETED",
		    NULL);
	    CACHE_STACK_INFO();
	    goto gotError;
	}

#ifdef TCL_COMPILE_DEBUG
	if (tclTraceExec >= 2) {
	    if (traceInstructions) {
................................................................................
	 * Install a tailcall record in the caller and continue with the
	 * yield. The yield is switched into multi-return mode (via the
	 * 'yieldParameter').
	 */

	Tcl_IncrRefCount(valuePtr);
	iPtr->execEnvPtr = corPtr->callerEEPtr;
	TclSetTailcall(interp, valuePtr);
	iPtr->execEnvPtr = corPtr->eePtr;
	yieldParameter = (PTR2INT(NULL)+1);	/*==CORO_ACTIVATE_YIELDM*/


    doYield:
	/* TIP #280: Record the last piece of info needed by
	 * 'TclGetSrcInfoForPc', and push the frame.
	 */

	bcFramePtr->data.tebc.pc = (char *) pc;
	iPtr->cmdFramePtr = bcFramePtr;
................................................................................
	TEBC_YIELD();
	TclNRAddCallback(interp, TclNRCoroutineActivateCallback, corPtr,
		INT2PTR(yieldParameter), NULL, NULL);
	return TCL_OK;
    }

    case INST_TAILCALL: {
	Tcl_Obj *listPtr, *nsObjPtr;

	opnd = TclGetUInt1AtPtr(pc+1);

	if (!(iPtr->varFramePtr->isProcCallFrame & 1)) {
	    TRACE(("%d => ERROR: tailcall in non-proc context\n", opnd));
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "tailcall can only be called from a proc or lambda", -1));
................................................................................

	/*
	 * Push the evaluation of the called command into the NR callback
	 * stack.
	 */

	listPtr = Tcl_NewListObj(opnd, &OBJ_AT_DEPTH(opnd-1));
	nsObjPtr = Tcl_NewStringObj(iPtr->varFramePtr->nsPtr->fullName, -1);
	TclListObjSetElement(interp, listPtr, 0, nsObjPtr);
	if (iPtr->varFramePtr->tailcallPtr) {
	    Tcl_DecrRefCount(iPtr->varFramePtr->tailcallPtr);

	}


	iPtr->varFramePtr->tailcallPtr = listPtr;

	result = TCL_RETURN;
	cleanup = opnd;
	goto processExceptionReturn;
    }

    case INST_DONE:

	    fflush(stdout);
	}
#endif
	yieldParameter = 0;
	Tcl_SetObjResult(interp, OBJ_AT_TOS);
	goto doYield;

    case INST_YIELD_TO_INVOKE: {
	Namespace *currNsPtr = (Namespace *) TclGetCurrentNamespace(interp);
	corPtr = iPtr->execEnvPtr->corPtr;
	valuePtr = OBJ_AT_TOS;
	if (!corPtr) {
	    TRACE(("[%.30s] => ERROR: yield outside coroutine\n",
		    O2S(valuePtr)));
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "yieldto can only be called in a coroutine", -1));
	    DECACHE_STACK_INFO();
	    Tcl_SetErrorCode(interp, "TCL", "COROUTINE", "ILLEGAL_YIELD",
		    NULL);











	    CACHE_STACK_INFO();
	    goto gotError;
	}

#ifdef TCL_COMPILE_DEBUG
	if (tclTraceExec >= 2) {
	    if (traceInstructions) {
................................................................................
	 * Install a tailcall record in the caller and continue with the
	 * yield. The yield is switched into multi-return mode (via the
	 * 'yieldParameter').
	 */

	Tcl_IncrRefCount(valuePtr);
	iPtr->execEnvPtr = corPtr->callerEEPtr;
	TclSetTailcall(interp, currNsPtr, valuePtr);
	iPtr->execEnvPtr = corPtr->eePtr;
	yieldParameter = (PTR2INT(NULL)+1);	/*==CORO_ACTIVATE_YIELDM*/

    }
    doYield:
	/* TIP #280: Record the last piece of info needed by
	 * 'TclGetSrcInfoForPc', and push the frame.
	 */

	bcFramePtr->data.tebc.pc = (char *) pc;
	iPtr->cmdFramePtr = bcFramePtr;
................................................................................
	TEBC_YIELD();
	TclNRAddCallback(interp, TclNRCoroutineActivateCallback, corPtr,
		INT2PTR(yieldParameter), NULL, NULL);
	return TCL_OK;
    }

    case INST_TAILCALL: {
	Tcl_Obj *listPtr;

	opnd = TclGetUInt1AtPtr(pc+1);

	if (!(iPtr->varFramePtr->isProcCallFrame & 1)) {
	    TRACE(("%d => ERROR: tailcall in non-proc context\n", opnd));
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "tailcall can only be called from a proc or lambda", -1));
................................................................................

	/*
	 * Push the evaluation of the called command into the NR callback
	 * stack.
	 */

	listPtr = Tcl_NewListObj(opnd, &OBJ_AT_DEPTH(opnd-1));
	if (iPtr->varFramePtr->tailcallNsPtr) {
	    TclNsDecrRefCount(iPtr->varFramePtr->tailcallNsPtr);
	    iPtr->varFramePtr->tailcallNsPtr = NULL;
	    Tcl_DecrRefCount(iPtr->varFramePtr->tailcallCmdPtr);
	    iPtr->varFramePtr->tailcallCmdPtr = NULL;
	}
	iPtr->varFramePtr->tailcallNsPtr = iPtr->varFramePtr->nsPtr;
	iPtr->varFramePtr->tailcallNsPtr->refCount++;
	iPtr->varFramePtr->tailcallCmdPtr = listPtr;

	result = TCL_RETURN;
	cleanup = opnd;
	goto processExceptionReturn;
    }

    case INST_DONE:

				 * NULL, there are no children. */
#endif
    unsigned long nsId;		/* Unique id for the namespace. */
    Tcl_Interp *interp;		/* The interpreter containing this
				 * namespace. */
    int flags;			/* OR-ed combination of the namespace status
				 * flags NS_DYING and NS_DEAD listed below. */
    int activationCount;	/* Number of "activations" or active call
				 * frames for this namespace that are on the
				 * Tcl call stack. The namespace won't be
				 * freed until activationCount becomes zero. */
    unsigned int refCount;	/* Count of references by namespaceName
				 * objects. The namespace can't be freed until
				 * refCount becomes zero. */
    Tcl_HashTable cmdTable;	/* Contains all the commands currently
				 * registered in the namespace. Indexed by
				 * strings; values have type (Command *).
				 * Commands imported by Tcl_Import have
................................................................................
 *		namespace and no call frames still refer to it. Its variables
 *		and command have already been destroyed. This bit allows the
 *		namespace resolution code to recognize that the namespace is
 *		"deleted". When the last namespaceName object in any byte code
 *		unit that refers to the namespace has been freed (i.e., when
 *		the namespace's refCount is 0), the namespace's storage will
 *		be freed.
 * NS_KILLED -	1 means that TclTeardownNamespace has already been called on
 *		this namespace and it should not be called again [Bug 1355942]
 * NS_SUPPRESS_COMPILATION -
 *		Marks the commands in this namespace for not being compiled,
 *		forcing them to be looked up every time.
 */

#define NS_DYING	0x01
#define NS_DEAD		0x02
#define NS_KILLED	0x04
#define NS_SUPPRESS_COMPILATION	0x08

................................................................................
				 * sets it, and it should only ever be set by
				 * the code that is pushing the frame. In that
				 * case, the code that sets it should also
				 * have some means of discovering what the
				 * meaning of the value is, which we do not
				 * specify. */
    LocalCache *localCachePtr;

    Tcl_Obj    *tailcallPtr;
				/* NULL if no tailcall is scheduled */
} CallFrame;

#define FRAME_IS_PROC	0x1
#define FRAME_IS_LAMBDA 0x2
#define FRAME_IS_METHOD	0x4	/* The frame is a method body, and the frame's
				 * clientData field contains a CallContext
................................................................................
MODULE_SCOPE Tcl_ObjCmdProc TclNRCoroutineObjCmd;
MODULE_SCOPE Tcl_ObjCmdProc TclNRYieldObjCmd;
MODULE_SCOPE Tcl_ObjCmdProc TclNRYieldmObjCmd;
MODULE_SCOPE Tcl_ObjCmdProc TclNRYieldToObjCmd;
MODULE_SCOPE Tcl_ObjCmdProc TclNRInvoke;
MODULE_SCOPE Tcl_NRPostProc TclNRReleaseValues;

MODULE_SCOPE void  TclSetTailcall(Tcl_Interp *interp, Tcl_Obj *tailcallPtr);

MODULE_SCOPE void  TclPushTailcallPoint(Tcl_Interp *interp);

/* These two can be considered for the public api */
MODULE_SCOPE void  TclMarkTailcall(Tcl_Interp *interp);
MODULE_SCOPE void  TclSkipTailcall(Tcl_Interp *interp);

/*
................................................................................

/*
 *----------------------------------------------------------------
 * Inline version of Tcl_GetCurrentNamespace and Tcl_GetGlobalNamespace.
 */

#define TclGetCurrentNamespace(interp) \
    (Tcl_Namespace *) ((Interp *)(interp))->varFramePtr->nsPtr



#define TclGetGlobalNamespace(interp) \
    (Tcl_Namespace *) ((Interp *)(interp))->globalNsPtr

/*
 *----------------------------------------------------------------
 * Inline version of TclCleanupCommand; still need the function as it is in

				 * NULL, there are no children. */
#endif
    unsigned long nsId;		/* Unique id for the namespace. */
    Tcl_Interp *interp;		/* The interpreter containing this
				 * namespace. */
    int flags;			/* OR-ed combination of the namespace status
				 * flags NS_DYING and NS_DEAD listed below. */




    unsigned int refCount;	/* Count of references by namespaceName
				 * objects. The namespace can't be freed until
				 * refCount becomes zero. */
    Tcl_HashTable cmdTable;	/* Contains all the commands currently
				 * registered in the namespace. Indexed by
				 * strings; values have type (Command *).
				 * Commands imported by Tcl_Import have
................................................................................
 *		namespace and no call frames still refer to it. Its variables
 *		and command have already been destroyed. This bit allows the
 *		namespace resolution code to recognize that the namespace is
 *		"deleted". When the last namespaceName object in any byte code
 *		unit that refers to the namespace has been freed (i.e., when
 *		the namespace's refCount is 0), the namespace's storage will
 *		be freed.
 * NS_KILLED -	Obsolete. Previously, 1 meant that TclTeardownNamespace has
 *		already been called on this namespace and it should not be
 *		called again [Bug 1355942] NS_SUPPRESS_COMPILATION - Marks the
 *		commands in this namespace for not being compiled, forcing them
 *		to be looked up every time.
 */

#define NS_DYING	0x01
#define NS_DEAD		0x02
#define NS_KILLED	0x04
#define NS_SUPPRESS_COMPILATION	0x08

................................................................................
				 * sets it, and it should only ever be set by
				 * the code that is pushing the frame. In that
				 * case, the code that sets it should also
				 * have some means of discovering what the
				 * meaning of the value is, which we do not
				 * specify. */
    LocalCache *localCachePtr;
    Namespace * tailcallNsPtr;
    Tcl_Obj *tailcallCmdPtr;
				/* NULL if no tailcall is scheduled */
} CallFrame;

#define FRAME_IS_PROC	0x1
#define FRAME_IS_LAMBDA 0x2
#define FRAME_IS_METHOD	0x4	/* The frame is a method body, and the frame's
				 * clientData field contains a CallContext
................................................................................
MODULE_SCOPE Tcl_ObjCmdProc TclNRCoroutineObjCmd;
MODULE_SCOPE Tcl_ObjCmdProc TclNRYieldObjCmd;
MODULE_SCOPE Tcl_ObjCmdProc TclNRYieldmObjCmd;
MODULE_SCOPE Tcl_ObjCmdProc TclNRYieldToObjCmd;
MODULE_SCOPE Tcl_ObjCmdProc TclNRInvoke;
MODULE_SCOPE Tcl_NRPostProc TclNRReleaseValues;

MODULE_SCOPE void  TclSetTailcall(Tcl_Interp *interp, Namespace *nsPtr,
			    Tcl_Obj *listPtr);
MODULE_SCOPE void  TclPushTailcallPoint(Tcl_Interp *interp);

/* These two can be considered for the public api */
MODULE_SCOPE void  TclMarkTailcall(Tcl_Interp *interp);
MODULE_SCOPE void  TclSkipTailcall(Tcl_Interp *interp);

/*
................................................................................

/*
 *----------------------------------------------------------------
 * Inline version of Tcl_GetCurrentNamespace and Tcl_GetGlobalNamespace.
 */

#define TclGetCurrentNamespace(interp) \
    (Tcl_Namespace *) ((((Interp *)(interp))->varFramePtr->nsPtr->flags & NS_DEAD) \
	? ((Interp *) (interp))->globalNsPtr \
	: ((Interp *) (interp))->varFramePtr->nsPtr)

#define TclGetGlobalNamespace(interp) \
    (Tcl_Namespace *) ((Interp *)(interp))->globalNsPtr

/*
 *----------------------------------------------------------------
 * Inline version of TclCleanupCommand; still need the function as it is in

    if (namespacePtr == NULL) {
	nsPtr = (Namespace *) TclGetCurrentNamespace(interp);
    } else {
	nsPtr = (Namespace *) namespacePtr;

	/*
	 * TODO: Examine whether it would be better to guard based on NS_DYING
	 * or NS_KILLED. It appears that these are not tested because they can
	 * be set in a global interp that has been [namespace delete]d, but
	 * which never really completely goes away because of lingering global
	 * things like ::errorInfo and [::unknown] and hidden commands.
	 * Review of those designs might permit stricter checking here.
	 */

	if (nsPtr->flags & NS_DEAD) {
	    Tcl_Panic("Trying to push call frame for dead namespace");
	    /*NOTREACHED*/
	}
    }

    nsPtr->activationCount++;
    framePtr->nsPtr = nsPtr;
    framePtr->isProcCallFrame = isProcCallFrame;
    framePtr->objc = 0;
    framePtr->objv = NULL;
    framePtr->callerPtr = iPtr->framePtr;
    framePtr->callerVarPtr = iPtr->varFramePtr;
    if (iPtr->varFramePtr != NULL) {
................................................................................
    }
    framePtr->procPtr = NULL;		/* no called procedure */
    framePtr->varTablePtr = NULL;	/* and no local variables */
    framePtr->numCompiledLocals = 0;
    framePtr->compiledLocals = NULL;
    framePtr->clientData = NULL;
    framePtr->localCachePtr = NULL;
    framePtr->tailcallPtr = NULL;


    /*
     * Push the new call frame onto the interpreter's stack of procedure call
     * frames making it the current frame.
     */

    iPtr->framePtr = framePtr;
................................................................................

void
Tcl_PopCallFrame(
    Tcl_Interp *interp)		/* Interpreter with call frame to pop. */
{
    register Interp *iPtr = (Interp *) interp;
    register CallFrame *framePtr = iPtr->framePtr;
    Namespace *nsPtr;

    /*
     * It's important to remove the call frame from the interpreter's stack of
     * call frames before deleting local variables, so that traces invoked by
     * the variable deletion don't see the partially-deleted frame.
     */

................................................................................
	if (framePtr->localCachePtr->refCount-- <= 1) {
	    TclFreeLocalCache(interp, framePtr->localCachePtr);
	}
	framePtr->localCachePtr = NULL;
    }

    /*
     * Decrement the namespace's count of active call frames. If the namespace
     * is "dying" and there are no more active call frames, call
     * Tcl_DeleteNamespace to destroy it.
     */


    nsPtr = framePtr->nsPtr;
    nsPtr->activationCount--;
    if ((nsPtr->flags & NS_DYING)
	    && (nsPtr->activationCount - (nsPtr == iPtr->globalNsPtr) == 0)) {
	Tcl_DeleteNamespace((Tcl_Namespace *) nsPtr);
    }
    framePtr->nsPtr = NULL;

    if (framePtr->tailcallPtr) {
	TclSetTailcall(interp, framePtr->tailcallPtr);



    }
}
 
/*
 *----------------------------------------------------------------------
 *
 * TclPushStackFrame --
................................................................................
    Tcl_InitHashTable(&nsPtr->childTable, TCL_STRING_KEYS);
#else
    nsPtr->childTablePtr = NULL;
#endif
    nsPtr->nsId = ++(tsdPtr->numNsCreated);
    nsPtr->interp = interp;
    nsPtr->flags = 0;
    nsPtr->activationCount = 0;
    nsPtr->refCount = 0;
    Tcl_InitHashTable(&nsPtr->cmdTable, TCL_STRING_KEYS);
    TclInitVarHashTable(&nsPtr->varTable, nsPtr);
    nsPtr->exportArrayPtr = NULL;
    nsPtr->numExportPatterns = 0;
    nsPtr->maxExportPatterns = 0;
    nsPtr->cmdRefEpoch = 0;
    nsPtr->resolverEpoch = 0;
................................................................................
 *----------------------------------------------------------------------
 */

void
Tcl_DeleteNamespace(
    Tcl_Namespace *namespacePtr)/* Points to the namespace to delete. */
{

    register Namespace *nsPtr = (Namespace *) namespacePtr;
    Interp *iPtr = (Interp *) nsPtr->interp;
    Namespace *globalNsPtr = (Namespace *)
	    TclGetGlobalNamespace((Tcl_Interp *) iPtr);
    Tcl_HashEntry *entryPtr;
    Tcl_HashSearch search;
    Command *cmdPtr;

    /*
     * Ensure that this namespace doesn't get deallocated in the meantime.
     */
    nsPtr->refCount++;


    /*
     * Give anyone interested - notably TclOO - a chance to use this namespace
     * normally despite the fact that the namespace is going to go. Allows the
     * calling of destructors. Will only be called once (unless re-established
     * by the called function). [Bug 2950259]
     *
................................................................................
     * being careful with reentrancy.
     */

    if (nsPtr->earlyDeleteProc != NULL) {
	Tcl_NamespaceDeleteProc *earlyDeleteProc = nsPtr->earlyDeleteProc;

	nsPtr->earlyDeleteProc = NULL;
	nsPtr->activationCount++;
	earlyDeleteProc(nsPtr->clientData);
	nsPtr->activationCount--;
    }



    /*




















     * Delete all coroutine commands now: break the circular ref cycle between
     * the namespace and the coroutine command [Bug 2724403]. This code is
     * essentially duplicated in TclTeardownNamespace() for all other
     * commands. Don't optimize to Tcl_NextHashEntry() because of traces.
     *
     * NOTE: we could avoid traversing the ns's command list by keeping a
     * separate list of coros.
     */

    for (entryPtr = Tcl_FirstHashEntry(&nsPtr->cmdTable, &search);
	    entryPtr != NULL;) {
	cmdPtr = Tcl_GetHashValue(entryPtr);
	if (cmdPtr->nreProc == TclNRInterpCoroutine) {
	    Tcl_DeleteCommandFromToken((Tcl_Interp *) iPtr,
		    (Tcl_Command) cmdPtr);
	    entryPtr = Tcl_FirstHashEntry(&nsPtr->cmdTable, &search);
	} else {
	    entryPtr = Tcl_NextHashEntry(&search);
	}
    }

    /*
     * If the namespace has associated ensemble commands, delete them first.
     * This leaves the actual contents of the namespace alone (unless they are
     * linked ensemble commands, of course). Note that this code is actually
     * reentrant so command delete traces won't purturb things badly.










     */































































































    while (nsPtr->ensembles != NULL) {
	EnsembleConfig *ensemblePtr = (EnsembleConfig *) nsPtr->ensembles;

	/*
	 * Splice out and link to indicate that we've already been killed.

	 */

	nsPtr->ensembles = (Tcl_Ensemble *) ensemblePtr->next;
	ensemblePtr->next = ensemblePtr;
	Tcl_DeleteCommandFromToken(nsPtr->interp, ensemblePtr->token);


    }

    /*
     * If the namespace has a registered unknown handler (TIP 181), then free
     * it here.
     */

    if (nsPtr->unknownHandlerPtr != NULL) {
	Tcl_DecrRefCount(nsPtr->unknownHandlerPtr);
	nsPtr->unknownHandlerPtr = NULL;
    }

    /*
     * If the namespace is on the call frame stack, it is marked as "dying"
     * (NS_DYING is OR'd into its flags): the namespace can't be looked up by
     * name but its commands and variables are still usable by those active
     * call frames. When all active call frames referring to the namespace
     * have been popped from the Tcl stack, Tcl_PopCallFrame will call this
     * function again to delete everything in the namespace. If no nsName
     * objects refer to the namespace (i.e., if its refCount is zero), its
     * commands and variables are deleted and the storage for its namespace
     * structure is freed. Otherwise, if its refCount is nonzero, the
     * namespace's commands and variables are deleted but the structure isn't
     * freed. Instead, NS_DEAD is OR'd into the structure's flags to allow the
     * namespace resolution code to recognize that the namespace is "deleted".
     * The structure's storage is freed by FreeNsNameInternalRep when its
     * refCount reaches 0.

     */

    if (nsPtr->activationCount - (nsPtr == globalNsPtr) > 0) {
	nsPtr->flags |= NS_DYING;
	if (nsPtr->parentPtr != NULL) {
	    entryPtr = Tcl_FindHashEntry(
		    TclGetNamespaceChildTable((Tcl_Namespace *)
			    nsPtr->parentPtr), nsPtr->name);
	    if (entryPtr != NULL) {
		Tcl_DeleteHashEntry(entryPtr);
	    }
	}

	nsPtr->parentPtr = NULL;
    } else if (!(nsPtr->flags & NS_KILLED)) {


	/*
	 * Delete the namespace and everything in it. If this is the global
	 * namespace, then clear it but don't free its storage unless the
	 * interpreter is being torn down. Set the NS_KILLED flag to avoid
	 * recursive calls here - if the namespace is really in the process of
	 * being deleted, ignore any second call.
	 */

	nsPtr->flags |= (NS_DYING|NS_KILLED);




	TclTeardownNamespace(nsPtr);



	if ((nsPtr != globalNsPtr) || (iPtr->flags & DELETED)) {











	    /*
	     * If this is the global namespace, then it may have residual
	     * "errorInfo" and "errorCode" variables for errors that occurred
	     * while it was being torn down. Try to clear the variable list
	     * one last time.



	     */

	    TclDeleteNamespaceVars(nsPtr);










#ifndef BREAK_NAMESPACE_COMPAT
	    Tcl_DeleteHashTable(&nsPtr->childTable);
#else
	    if (nsPtr->childTablePtr != NULL) {
		Tcl_DeleteHashTable(nsPtr->childTablePtr);
		ckfree(nsPtr->childTablePtr);
	    }
#endif
	    Tcl_DeleteHashTable(&nsPtr->cmdTable);

	    nsPtr ->flags |= NS_DEAD;

	} else {
	    /*
	     * Restore the ::errorInfo and ::errorCode traces.
	     */

	    EstablishErrorInfoTraces(NULL, nsPtr->interp, NULL, NULL, 0);
	    EstablishErrorCodeTraces(NULL, nsPtr->interp, NULL, NULL, 0);

	    /*
	     * We didn't really kill it, so remove the KILLED marks, so it can
	     * get killed later, avoiding mem leaks.
	     */

	    nsPtr->flags &= ~(NS_DYING|NS_KILLED);
	}
    }
    TclNsDecrRefCount(nsPtr);
}
 
/*
 *----------------------------------------------------------------------
 *
 * TclTeardownNamespace --
 *
................................................................................
 */

void
TclTeardownNamespace(
    register Namespace *nsPtr)	/* Points to the namespace to be dismantled
				 * and unlinked from its parent. */
{
    Interp *iPtr = (Interp *) nsPtr->interp;
    register Tcl_HashEntry *entryPtr;
    Tcl_HashSearch search;
    int i;

    /*
     * Start by destroying the namespace's variable table, since variables
     * might trigger traces. Variable table should be cleared but not freed!
     * TclDeleteNamespaceVars frees it, so we reinitialize it afterwards.
     */

    TclDeleteNamespaceVars(nsPtr);
    TclInitVarHashTable(&nsPtr->varTable, nsPtr);

    /*
     * Delete all commands in this namespace. Be careful when traversing the
     * hash table: when each command is deleted, it removes itself from the
     * command table. Because of traces (and the desire to avoid the quadratic
     * problems of just using Tcl_FirstHashEntry over and over, [Bug
     * f97d4ee020]) we copy to a temporary array and then delete all those
     * commands.
     */

    while (nsPtr->cmdTable.numEntries > 0) {
	int length = nsPtr->cmdTable.numEntries;
	Command **cmds = TclStackAlloc((Tcl_Interp *) iPtr,
		sizeof(Command *) * length);

	i = 0;
	for (entryPtr = Tcl_FirstHashEntry(&nsPtr->cmdTable, &search);
		entryPtr != NULL;
		entryPtr = Tcl_NextHashEntry(&search)) {
	    cmds[i] = Tcl_GetHashValue(entryPtr);
	    cmds[i]->refCount++;
	    i++;
	}
	for (i = 0 ; i < length ; i++) {
	    Tcl_DeleteCommandFromToken((Tcl_Interp *) iPtr,
		    (Tcl_Command) cmds[i]);
	    TclCleanupCommandMacro(cmds[i]);
	}
	TclStackFree((Tcl_Interp *) iPtr, cmds);
    }
    Tcl_DeleteHashTable(&nsPtr->cmdTable);
    Tcl_InitHashTable(&nsPtr->cmdTable, TCL_STRING_KEYS);

    /*
     * Remove the namespace from its parent's child hashtable.
     */

    if (nsPtr->parentPtr != NULL) {
	entryPtr = Tcl_FindHashEntry(
		TclGetNamespaceChildTable((Tcl_Namespace *)
			nsPtr->parentPtr), nsPtr->name);
	if (entryPtr != NULL) {
	    Tcl_DeleteHashEntry(entryPtr);
	}
    }
    nsPtr->parentPtr = NULL;

    /*
     * Delete the namespace path if one is installed.
     */

    if (nsPtr->commandPathLength != 0) {
	UnlinkNsPath(nsPtr);
	nsPtr->commandPathLength = 0;
    }
    if (nsPtr->commandPathSourceList != NULL) {
	NamespacePathEntry *nsPathPtr = nsPtr->commandPathSourceList;

	do {
	    if (nsPathPtr->nsPtr != NULL && nsPathPtr->creatorNsPtr != NULL) {
		nsPathPtr->creatorNsPtr->cmdRefEpoch++;
	    }
	    nsPathPtr->nsPtr = NULL;
	    nsPathPtr = nsPathPtr->nextPtr;
	} while (nsPathPtr != NULL);
	nsPtr->commandPathSourceList = NULL;
    }

    /*
     * Delete all the child namespaces.
     *
     * BE CAREFUL: When each child is deleted, it will divorce itself from its
     * parent. You can't traverse a hash table properly if its elements are
     * being deleted.  Because of traces (and the desire to avoid the
     * quadratic problems of just using Tcl_FirstHashEntry over and over, [Bug
     * f97d4ee020]) we copy to a temporary array and then delete all those
     * namespaces.
     *
     * Important: leave the hash table itself still live.
     */

#ifndef BREAK_NAMESPACE_COMPAT
    while (nsPtr->childTable.numEntries > 0) {
	int length = nsPtr->childTable.numEntries;
	Namespace **children = TclStackAlloc((Tcl_Interp *) iPtr,
		sizeof(Namespace *) * length);

	i = 0;
	for (entryPtr = Tcl_FirstHashEntry(&nsPtr->childTable, &search);
		entryPtr != NULL;
		entryPtr = Tcl_NextHashEntry(&search)) {
	    children[i] = Tcl_GetHashValue(entryPtr);
	    children[i]->refCount++;
	    i++;
	}
	for (i = 0 ; i < length ; i++) {
	    Tcl_DeleteNamespace((Tcl_Namespace *) children[i]);
	    TclNsDecrRefCount(children[i]);
	}
	TclStackFree((Tcl_Interp *) iPtr, children);
    }
#else
    if (nsPtr->childTablePtr != NULL) {
	while (nsPtr->childTablePtr->numEntries > 0) {
	    int length = nsPtr->childTablePtr->numEntries;
	    Namespace **children = TclStackAlloc((Tcl_Interp *) iPtr,
		    sizeof(Namespace *) * length);

	    i = 0;
	    for (entryPtr = Tcl_FirstHashEntry(nsPtr->childTablePtr, &search);
		    entryPtr != NULL;
		    entryPtr = Tcl_NextHashEntry(&search)) {
		children[i] = Tcl_GetHashValue(entryPtr);
		children[i]->refCount++;
		i++;
	    }
	    for (i = 0 ; i < length ; i++) {
		Tcl_DeleteNamespace((Tcl_Namespace *) children[i]);
		TclNsDecrRefCount(children[i]);
	    }
	    TclStackFree((Tcl_Interp *) iPtr, children);
	}
    }
#endif

    /*
     * Free the namespace's export pattern array.
     */

    if (nsPtr->exportArrayPtr != NULL) {
	for (i = 0;  i < nsPtr->numExportPatterns;  i++) {
	    ckfree(nsPtr->exportArrayPtr[i]);
................................................................................
	}
	ckfree(nsPtr->exportArrayPtr);
	nsPtr->exportArrayPtr = NULL;
	nsPtr->numExportPatterns = 0;
	nsPtr->maxExportPatterns = 0;
    }

    /*
     * Free any client data associated with the namespace.
     */

    if (nsPtr->deleteProc != NULL) {
	nsPtr->deleteProc(nsPtr->clientData);
    }
    nsPtr->deleteProc = NULL;
    nsPtr->clientData = NULL;

    /*
     * Reset the namespace's id field to ensure that this namespace won't be
     * interpreted as valid by, e.g., the cache validation code for cached
     * command references in Tcl_GetCommandFromObj.
     */

    nsPtr->nsId = 0;

}
 
/*
 *----------------------------------------------------------------------
 *
 * NamespaceFree --
 *
................................................................................
 *----------------------------------------------------------------------
 */

void
TclNsDecrRefCount(
    Namespace *nsPtr)
{
    if ((nsPtr->refCount-- <= 1) && (nsPtr->flags & NS_DEAD)) {
	NamespaceFree(nsPtr);
    }
}
 
/*
 *----------------------------------------------------------------------
 *
 * Tcl_Export --
................................................................................
     * namespace context. Note that we always treat two or more adjacent ":"s
     * as a namespace separator.
     */

    if (flags & TCL_GLOBAL_ONLY) {
	nsPtr = globalNsPtr;
    } else if (nsPtr == NULL) {
	nsPtr = iPtr->varFramePtr->nsPtr;
    }

    start = qualName;			/* Points to start of qualifying
					 * namespace. */
    if ((*qualName == ':') && (*(qualName+1) == ':')) {
	start = qualName+2;		/* Skip over the initial :: */
	while (*start == ':') {
................................................................................
 */
Tcl_Namespace *
TclEnsureNamespace(
    Tcl_Interp *interp,
    Tcl_Namespace *namespacePtr)
{
    Namespace *nsPtr = (Namespace *) namespacePtr;
    if (!(nsPtr->flags & NS_DYING)) {
	    return namespacePtr;
    }
    return Tcl_CreateNamespace(interp, nsPtr->fullName, NULL, NULL);
}
 
/*
 *----------------------------------------------------------------------
................................................................................
	Namespace *pathNsPtr, *realNsPtr, *dummyNsPtr;

	(void) TclGetNamespaceForQualName(interp, name, cxtNsPtr,
		TCL_NAMESPACE_ONLY, &realNsPtr, &dummyNsPtr, &dummyNsPtr,
		&simpleName);
	if ((realNsPtr != NULL) && (simpleName != NULL)) {
	    if ((cxtNsPtr == realNsPtr)
		    || !(realNsPtr->flags & NS_DYING)) {
		entryPtr = Tcl_FindHashEntry(&realNsPtr->cmdTable, simpleName);
		if (entryPtr != NULL) {
		    cmdPtr = Tcl_GetHashValue(entryPtr);
		}
	    }
	}

................................................................................
	    if (pathNsPtr == NULL) {
		continue;
	    }
	    (void) TclGetNamespaceForQualName(interp, name, pathNsPtr,
		    TCL_NAMESPACE_ONLY, &realNsPtr, &dummyNsPtr, &dummyNsPtr,
		    &simpleName);
	    if ((realNsPtr != NULL) && (simpleName != NULL)
		    && !(realNsPtr->flags & NS_DYING)) {
		entryPtr = Tcl_FindHashEntry(&realNsPtr->cmdTable, simpleName);
		if (entryPtr != NULL) {
		    cmdPtr = Tcl_GetHashValue(entryPtr);
		}
	    }
	}

................................................................................
	 */

	if (cmdPtr == NULL) {
	    (void) TclGetNamespaceForQualName(interp, name, NULL,
		    TCL_GLOBAL_ONLY, &realNsPtr, &dummyNsPtr, &dummyNsPtr,
		    &simpleName);
	    if ((realNsPtr != NULL) && (simpleName != NULL)
		    && !(realNsPtr->flags & NS_DYING)) {
		entryPtr = Tcl_FindHashEntry(&realNsPtr->cmdTable, simpleName);
		if (entryPtr != NULL) {
		    cmdPtr = Tcl_GetHashValue(entryPtr);
		}
	    }
	}
    } else {
................................................................................

	/*
	 * Look for the command in the command table of its namespace. Be sure
	 * to check both possible search paths: from the specified namespace
	 * context and from the global namespace.
	 */

	for (search = 0;  (search < 2) && (cmdPtr == NULL);  search++) {
	    if ((nsPtr[search] != NULL) && (simpleName != NULL)) {


		entryPtr = Tcl_FindHashEntry(&nsPtr[search]->cmdTable,
			simpleName);
		if (entryPtr != NULL) {
		    cmdPtr = Tcl_GetHashValue(entryPtr);
		}
	    }
	}

    }

    if (cmdPtr != NULL) {
	cmdPtr->flags  &= ~CMD_VIA_RESOLVER;
	return (Tcl_Command) cmdPtr;
    }

................................................................................
	 * Check that the ResolvedNsName is still valid; avoid letting the ref
	 * cross interps.
	 */

	resNamePtr = objPtr->internalRep.twoPtrValue.ptr1;
	nsPtr = resNamePtr->nsPtr;
	refNsPtr = resNamePtr->refNsPtr;
	if (!(nsPtr->flags & NS_DYING) && (interp == nsPtr->interp)
		&& (!refNsPtr || (refNsPtr ==
		(Namespace *) TclGetCurrentNamespace(interp)))) {
	    *nsPtrPtr = (Tcl_Namespace *) nsPtr;
	    return TCL_OK;
	}
    }
    if (SetNsNameFromAny(interp, objPtr) == TCL_OK) {
................................................................................
     * command line are valid, and report any errors.
     */

    for (i = 1;  i < objc;  i++) {
	name = TclGetString(objv[i]);
	namespacePtr = Tcl_FindNamespace(interp, name, NULL, /*flags*/ 0);
	if ((namespacePtr == NULL)
		|| (((Namespace *) namespacePtr)->flags & NS_KILLED)) {
	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
                    "unknown namespace \"%s\" in namespace delete command",
		    TclGetString(objv[i])));
	    Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "NAMESPACE",
		    TclGetString(objv[i]), NULL);
	    return TCL_ERROR;
	}
................................................................................
	/*
	 * Decrement the reference count for the cached namespace. If the
	 * namespace is dead, and there are no more references to it, free
	 * it.
	 */

	TclNsDecrRefCount(resNamePtr->nsPtr);



	ckfree(resNamePtr);
    }
    objPtr->typePtr = NULL;
}
 
/*
 *----------------------------------------------------------------------
................................................................................
	     &nsPtr, &dummy1Ptr, &dummy2Ptr, &dummy);

    /*
     * If we found a namespace, then create a new ResolvedNsName structure
     * that holds a reference to it.
     */

    if ((nsPtr == NULL) || (nsPtr->flags & NS_DYING)) {
	/*
	 * Our failed lookup proves any previously cached nsName intrep is no
	 * longer valid. Get rid of it so we no longer waste memory storing
	 * it, nor time determining its invalidity again and again.
	 */

	if (objPtr->typePtr == &nsNameType) {
	    TclFreeIntRep(objPtr);
	}
	return TCL_ERROR;
    }

    nsPtr->refCount++;
    resNamePtr = ckalloc(sizeof(ResolvedNsName));
    resNamePtr->nsPtr = nsPtr;

    if ((name[0] == ':') && (name[1] == ':')) {
	resNamePtr->refNsPtr = NULL;
    } else {
	resNamePtr->refNsPtr = (Namespace *) TclGetCurrentNamespace(interp);

    }
    resNamePtr->refCount = 1;
    TclFreeIntRep(objPtr);
    objPtr->internalRep.twoPtrValue.ptr1 = resNamePtr;
    objPtr->typePtr = &nsNameType;
    return TCL_OK;
}

    if (namespacePtr == NULL) {
	nsPtr = (Namespace *) TclGetCurrentNamespace(interp);
    } else {
	nsPtr = (Namespace *) namespacePtr;

	/*
	 * TODO: Examine whether it would be better to guard based on NS_DYING.
	 * It appears that these are not tested because they can
	 * be set in a global interp that has been [namespace delete]d, but
	 * which never really completely goes away because of lingering global
	 * things like ::errorInfo and [::unknown] and hidden commands.
	 * Review of those designs might permit stricter checking here.
	 */

	if (nsPtr->flags & NS_DEAD) {
	    Tcl_Panic("Trying to push call frame for dead namespace");
	    /*NOTREACHED*/
	}
    }

    nsPtr->refCount++;
    framePtr->nsPtr = nsPtr;
    framePtr->isProcCallFrame = isProcCallFrame;
    framePtr->objc = 0;
    framePtr->objv = NULL;
    framePtr->callerPtr = iPtr->framePtr;
    framePtr->callerVarPtr = iPtr->varFramePtr;
    if (iPtr->varFramePtr != NULL) {
................................................................................
    }
    framePtr->procPtr = NULL;		/* no called procedure */
    framePtr->varTablePtr = NULL;	/* and no local variables */
    framePtr->numCompiledLocals = 0;
    framePtr->compiledLocals = NULL;
    framePtr->clientData = NULL;
    framePtr->localCachePtr = NULL;
    framePtr->tailcallNsPtr = NULL;
    framePtr->tailcallCmdPtr = NULL;

    /*
     * Push the new call frame onto the interpreter's stack of procedure call
     * frames making it the current frame.
     */

    iPtr->framePtr = framePtr;
................................................................................

void
Tcl_PopCallFrame(
    Tcl_Interp *interp)		/* Interpreter with call frame to pop. */
{
    register Interp *iPtr = (Interp *) interp;
    register CallFrame *framePtr = iPtr->framePtr;


    /*
     * It's important to remove the call frame from the interpreter's stack of
     * call frames before deleting local variables, so that traces invoked by
     * the variable deletion don't see the partially-deleted frame.
     */

................................................................................
	if (framePtr->localCachePtr->refCount-- <= 1) {
	    TclFreeLocalCache(interp, framePtr->localCachePtr);
	}
	framePtr->localCachePtr = NULL;
    }

    /*
     * Decrement the namespace's count of active call frames.


     */

    /* Corresponds to refCount++ in Tcl_PushCallFrame */
    TclNsDecrRefCount(framePtr->nsPtr);





    framePtr->nsPtr = NULL;

    if (framePtr->tailcallNsPtr) {
	TclSetTailcall(interp, framePtr->tailcallNsPtr,
	    framePtr->tailcallCmdPtr);
	TclNsDecrRefCount(framePtr->tailcallNsPtr);
	framePtr->tailcallNsPtr = NULL;
    }
}
 
/*
 *----------------------------------------------------------------------
 *
 * TclPushStackFrame --
................................................................................
    Tcl_InitHashTable(&nsPtr->childTable, TCL_STRING_KEYS);
#else
    nsPtr->childTablePtr = NULL;
#endif
    nsPtr->nsId = ++(tsdPtr->numNsCreated);
    nsPtr->interp = interp;
    nsPtr->flags = 0;
    /* Corresponding TclNsDecrRefCount is at the end of Tcl_DeleteNamespace */
    nsPtr->refCount = 1;
    Tcl_InitHashTable(&nsPtr->cmdTable, TCL_STRING_KEYS);
    TclInitVarHashTable(&nsPtr->varTable, nsPtr);
    nsPtr->exportArrayPtr = NULL;
    nsPtr->numExportPatterns = 0;
    nsPtr->maxExportPatterns = 0;
    nsPtr->cmdRefEpoch = 0;
    nsPtr->resolverEpoch = 0;
................................................................................
 *----------------------------------------------------------------------
 */

void
Tcl_DeleteNamespace(
    Tcl_Namespace *namespacePtr)/* Points to the namespace to delete. */
{
    int i, newChildren;
    register Namespace *nsPtr = (Namespace *) namespacePtr, *childPtr ;
    Interp *iPtr = (Interp *) nsPtr->interp;
    Namespace *globalNsPtr = (Namespace *)
	TclGetGlobalNamespace((Tcl_Interp *) iPtr);
    register Tcl_HashEntry *entryPtr;
    Tcl_HashSearch search;
    Command *cmdPtr;

    if (nsPtr->flags & NS_DYING) {
	return;
    }

    nsPtr->flags |= NS_DYING;

    /*
     * Give anyone interested - notably TclOO - a chance to use this namespace
     * normally despite the fact that the namespace is going to go. Allows the
     * calling of destructors. Will only be called once (unless re-established
     * by the called function). [Bug 2950259]
     *
................................................................................
     * being careful with reentrancy.
     */

    if (nsPtr->earlyDeleteProc != NULL) {
	Tcl_NamespaceDeleteProc *earlyDeleteProc = nsPtr->earlyDeleteProc;

	nsPtr->earlyDeleteProc = NULL;

	earlyDeleteProc(nsPtr->clientData);

    }

    do {

	/*
	 * If the namespace has associated ensemble commands, delete them first.
	 * This leaves the actual contents of the namespace alone (unless they are
	 * linked ensemble commands, of course). Note that this code is actually
	 * reentrant so command delete traces won't purturb things badly.
	 */

	while (nsPtr->ensembles != NULL) {
	    EnsembleConfig *ensemblePtr = (EnsembleConfig *) nsPtr->ensembles;

	    /*
	     * Splice out and link to indicate that we've already been killed.
	     */

	    nsPtr->ensembles = (Tcl_Ensemble *) ensemblePtr->next;
	    ensemblePtr->next = ensemblePtr;
	    Tcl_DeleteCommandFromToken(nsPtr->interp, ensemblePtr->token);
	}


	/*
	 * Delete all coroutine commands now: break the circular ref cycle between
	 * the namespace and the coroutine command [Bug 2724403]. This code is
	 * essentially duplicated in TclTeardownNamespace() for all other
	 * commands. Don't optimize to Tcl_NextHashEntry() because of traces.
	 *
	 * NOTE: we could avoid traversing the ns's command list by keeping a
	 * separate list of coros.
	 */

	for (entryPtr = Tcl_FirstHashEntry(&nsPtr->cmdTable, &search);
		entryPtr != NULL;) {
	    cmdPtr = Tcl_GetHashValue(entryPtr);
	    if (cmdPtr->nreProc == TclNRInterpCoroutine) {
		Tcl_DeleteCommandFromToken((Tcl_Interp *) iPtr,
			(Tcl_Command) cmdPtr);
		entryPtr = Tcl_FirstHashEntry(&nsPtr->cmdTable, &search);
	    } else {
		entryPtr = Tcl_NextHashEntry(&search);
	    }
	}

	/*




	 * Delete all the child namespaces.
	 *
	 * BE CAREFUL: When each child is deleted, it will divorce itself from its
	 * parent. You can't traverse a hash table properly if its elements are
	 * being deleted.  Because of traces (and the desire to avoid the
	 * quadratic problems of just using Tcl_FirstHashEntry over and over, [Bug
	 * f97d4ee020]) we copy to a temporary array and then delete all those
	 * namespaces.
	 *
	 * Important: leave the hash table itself still live.
	 */

#ifndef BREAK_NAMESPACE_COMPAT
	do {
	    int length = nsPtr->childTable.numEntries;
	    Namespace **children = TclStackAlloc((Tcl_Interp *) iPtr,
		    sizeof(Namespace *) * length);
	    newChildren = 0;

	    i = 0;
	    for (entryPtr = Tcl_FirstHashEntry(&nsPtr->childTable, &search);
		    entryPtr != NULL;
		    entryPtr = Tcl_NextHashEntry(&search)) {
		children[i] = Tcl_GetHashValue(entryPtr);
		children[i]->refCount++;
		i++;
	    }
	    for (i = 0 ; i < length ; i++) {
		Tcl_DeleteNamespace((Tcl_Namespace *) children[i]);
		TclNsDecrRefCount(children[i]);
	    }
	    TclStackFree((Tcl_Interp *) iPtr, children);
	    for (entryPtr = Tcl_FirstHashEntry(&nsPtr->childTable, &search);
		    entryPtr != NULL;
		    entryPtr = Tcl_NextHashEntry(&search)) {
		childPtr = Tcl_GetHashValue(entryPtr);
		if (!(childPtr->flags & NS_DYING)) {
		    newChildren = 1;
		    break;
		}
	    }

	} while (newChildren);
#else
	if (nsPtr->childTablePtr != NULL) {
	    while (nsPtr->childTablePtr->numEntries > 0) {
		int length = nsPtr->childTablePtr->numEntries;
		Namespace **children = TclStackAlloc((Tcl_Interp *) iPtr,
			sizeof(Namespace *) * length);

		i = 0;
		for (entryPtr = Tcl_FirstHashEntry(nsPtr->childTablePtr, &search);
			entryPtr != NULL;
			entryPtr = Tcl_NextHashEntry(&search)) {
		    children[i] = Tcl_GetHashValue(entryPtr);
		    children[i]->refCount++;
		    i++;
		}
		for (i = 0 ; i < length ; i++) {
		    Tcl_DeleteNamespace((Tcl_Namespace *) children[i]);
		    TclNsDecrRefCount(children[i]);
		}
		TclStackFree((Tcl_Interp *) iPtr, children);
	    }
	}
#endif
	/*
	 * Delete all commands in this namespace. Be careful when traversing the
	 * hash table: when each command is deleted, it removes itself from the
	 * command table. Because of traces (and the desire to avoid the quadratic
	 * problems of just using Tcl_FirstHashEntry over and over, [Bug
	 * f97d4ee020]) we copy to a temporary array and then delete all those
	 * commands.
	 */

	while (nsPtr->cmdTable.numEntries > 0) {
	    int length = nsPtr->cmdTable.numEntries;
	    Command **cmds = TclStackAlloc((Tcl_Interp *) iPtr,
		    sizeof(Command *) * length);

	    i = 0;
	    for (entryPtr = Tcl_FirstHashEntry(&nsPtr->cmdTable, &search);
		    entryPtr != NULL;
		    entryPtr = Tcl_NextHashEntry(&search)) {
		cmds[i] = Tcl_GetHashValue(entryPtr);
		cmds[i]->refCount++;
		i++;
	    }
	    for (i = 0 ; i < length ; i++) {
		Tcl_DeleteCommandFromToken((Tcl_Interp *) iPtr,
			(Tcl_Command) cmds[i]);
		TclCleanupCommandMacro(cmds[i]);
	    }
	    TclStackFree((Tcl_Interp *) iPtr, cmds);
	}

	/*
	 * Destroying the namespace's variable table, which may trigger traces.
	 * Variable table should be cleared but not freed!
	 * TclDeleteNamespaceVars frees it, so we reinitialize it afterwards.
	 */

	TclDeleteNamespaceVars(nsPtr);
	TclInitVarHashTable(&nsPtr->varTable, nsPtr);

    } while (nsPtr->varTable.table.numEntries > 0
	|| newChildren || nsPtr->ensembles != NULL);


    /*

     * Free any client data associated with the namespace.
     */




    if (nsPtr->deleteProc != NULL) {
	nsPtr->deleteProc(nsPtr->clientData);
    }

    /*
     * If the namespace has a registered unknown handler (TIP 181), then free
     * it here.
     */

    if (nsPtr->unknownHandlerPtr != NULL) {
	Tcl_DecrRefCount(nsPtr->unknownHandlerPtr);
	nsPtr->unknownHandlerPtr = NULL;
    }

    /*














     * Remove the namespace from its parent's child hashtable.
     */



    if (nsPtr->parentPtr != NULL) {
	entryPtr = Tcl_FindHashEntry(
		TclGetNamespaceChildTable((Tcl_Namespace *)
			nsPtr->parentPtr), nsPtr->name);
	if (entryPtr != NULL) {
	    Tcl_DeleteHashEntry(entryPtr);
	}
    }

    nsPtr->parentPtr = NULL;



    /*
     * Delete the namespace path if one is installed.




     */


    if (nsPtr->commandPathLength != 0) {
	UnlinkNsPath(nsPtr);
	nsPtr->commandPathLength = 0;
    }

    if (nsPtr->commandPathSourceList != NULL) {
	NamespacePathEntry *nsPathPtr = nsPtr->commandPathSourceList;


	do {
	    if (nsPathPtr->nsPtr != NULL && nsPathPtr->creatorNsPtr != NULL) {
		nsPathPtr->creatorNsPtr->cmdRefEpoch++;
	    }
	    nsPathPtr->nsPtr = NULL;
	    nsPathPtr = nsPathPtr->nextPtr;
	} while (nsPathPtr != NULL);
	nsPtr->commandPathSourceList = NULL;
    }


    /*




     * Reset the namespace's id field to ensure that this namespace won't be
     * interpreted as valid by, e.g., the cache validation code for cached
     * command references in Tcl_GetCommandFromObj.
     */


    nsPtr->nsId = 0;

    if ((nsPtr != globalNsPtr) || (iPtr->flags & DELETED)) {

	/* No variables or commands are allowed after this point */
	nsPtr->flags |= NS_DEAD;
	Tcl_DeleteHashTable(&nsPtr->varTable.table);
	Tcl_DeleteHashTable(&nsPtr->cmdTable);


#ifndef BREAK_NAMESPACE_COMPAT
	Tcl_DeleteHashTable(&nsPtr->childTable);
#else
	if (nsPtr->childTablePtr != NULL) {
	    Tcl_DeleteHashTable(nsPtr->childTablePtr);
	    ckfree(nsPtr->childTablePtr);
	}
#endif



	TclNsDecrRefCount(nsPtr);
    } else {
	/*
	 * Restore the ::errorInfo and ::errorCode traces.
	 */

	EstablishErrorInfoTraces(NULL, nsPtr->interp, NULL, NULL, 0);
	EstablishErrorCodeTraces(NULL, nsPtr->interp, NULL, NULL, 0);

	/*
	 * We didn't really kill it, so remove the KILLED marks, so it can
	 * get killed later, avoiding mem leaks.
	 */

	nsPtr->flags &= ~(NS_DYING|NS_DEAD);
    }


}
 
/*
 *----------------------------------------------------------------------
 *
 * TclTeardownNamespace --
 *
................................................................................
 */

void
TclTeardownNamespace(
    register Namespace *nsPtr)	/* Points to the namespace to be dismantled
				 * and unlinked from its parent. */
{



    int i;






































































































































    /*
     * Free the namespace's export pattern array.
     */

    if (nsPtr->exportArrayPtr != NULL) {
	for (i = 0;  i < nsPtr->numExportPatterns;  i++) {
	    ckfree(nsPtr->exportArrayPtr[i]);
................................................................................
	}
	ckfree(nsPtr->exportArrayPtr);
	nsPtr->exportArrayPtr = NULL;
	nsPtr->numExportPatterns = 0;
	nsPtr->maxExportPatterns = 0;
    }


















    NamespaceFree(nsPtr);
}
 
/*
 *----------------------------------------------------------------------
 *
 * NamespaceFree --
 *
................................................................................
 *----------------------------------------------------------------------
 */

void
TclNsDecrRefCount(
    Namespace *nsPtr)
{
    if (nsPtr->refCount-- == 1) {
	TclTeardownNamespace(nsPtr);
    }
}
 
/*
 *----------------------------------------------------------------------
 *
 * Tcl_Export --
................................................................................
     * namespace context. Note that we always treat two or more adjacent ":"s
     * as a namespace separator.
     */

    if (flags & TCL_GLOBAL_ONLY) {
	nsPtr = globalNsPtr;
    } else if (nsPtr == NULL) {
	nsPtr = (Namespace *)TclGetCurrentNamespace(iPtr);
    }

    start = qualName;			/* Points to start of qualifying
					 * namespace. */
    if ((*qualName == ':') && (*(qualName+1) == ':')) {
	start = qualName+2;		/* Skip over the initial :: */
	while (*start == ':') {
................................................................................
 */
Tcl_Namespace *
TclEnsureNamespace(
    Tcl_Interp *interp,
    Tcl_Namespace *namespacePtr)
{
    Namespace *nsPtr = (Namespace *) namespacePtr;
    if (!(nsPtr->flags & NS_DEAD)) {
	    return namespacePtr;
    }
    return Tcl_CreateNamespace(interp, nsPtr->fullName, NULL, NULL);
}
 
/*
 *----------------------------------------------------------------------
................................................................................
	Namespace *pathNsPtr, *realNsPtr, *dummyNsPtr;

	(void) TclGetNamespaceForQualName(interp, name, cxtNsPtr,
		TCL_NAMESPACE_ONLY, &realNsPtr, &dummyNsPtr, &dummyNsPtr,
		&simpleName);
	if ((realNsPtr != NULL) && (simpleName != NULL)) {
	    if ((cxtNsPtr == realNsPtr)
		    || !(realNsPtr->flags & NS_DEAD)) {
		entryPtr = Tcl_FindHashEntry(&realNsPtr->cmdTable, simpleName);
		if (entryPtr != NULL) {
		    cmdPtr = Tcl_GetHashValue(entryPtr);
		}
	    }
	}

................................................................................
	    if (pathNsPtr == NULL) {
		continue;
	    }
	    (void) TclGetNamespaceForQualName(interp, name, pathNsPtr,
		    TCL_NAMESPACE_ONLY, &realNsPtr, &dummyNsPtr, &dummyNsPtr,
		    &simpleName);
	    if ((realNsPtr != NULL) && (simpleName != NULL)
		    && !(realNsPtr->flags & NS_DEAD)) {
		entryPtr = Tcl_FindHashEntry(&realNsPtr->cmdTable, simpleName);
		if (entryPtr != NULL) {
		    cmdPtr = Tcl_GetHashValue(entryPtr);
		}
	    }
	}

................................................................................
	 */

	if (cmdPtr == NULL) {
	    (void) TclGetNamespaceForQualName(interp, name, NULL,
		    TCL_GLOBAL_ONLY, &realNsPtr, &dummyNsPtr, &dummyNsPtr,
		    &simpleName);
	    if ((realNsPtr != NULL) && (simpleName != NULL)
		    && !(realNsPtr->flags & NS_DEAD)) {
		entryPtr = Tcl_FindHashEntry(&realNsPtr->cmdTable, simpleName);
		if (entryPtr != NULL) {
		    cmdPtr = Tcl_GetHashValue(entryPtr);
		}
	    }
	}
    } else {
................................................................................

	/*
	 * Look for the command in the command table of its namespace. Be sure
	 * to check both possible search paths: from the specified namespace
	 * context and from the global namespace.
	 */

	    for (search = 0;  (search < 2) && (cmdPtr == NULL);  search++) {
		if ((nsPtr[search] != NULL) && (simpleName != NULL)
		    && !(nsPtr[search]->flags & NS_DEAD)) {

		    entryPtr = Tcl_FindHashEntry(&nsPtr[search]->cmdTable,
			    simpleName);
		    if (entryPtr != NULL) {
			cmdPtr = Tcl_GetHashValue(entryPtr);
		    }
		}
	    }

    }

    if (cmdPtr != NULL) {
	cmdPtr->flags  &= ~CMD_VIA_RESOLVER;
	return (Tcl_Command) cmdPtr;
    }

................................................................................
	 * Check that the ResolvedNsName is still valid; avoid letting the ref
	 * cross interps.
	 */

	resNamePtr = objPtr->internalRep.twoPtrValue.ptr1;
	nsPtr = resNamePtr->nsPtr;
	refNsPtr = resNamePtr->refNsPtr;
	if (!(nsPtr->flags & NS_DEAD) && (interp == nsPtr->interp)
		&& (!refNsPtr || (refNsPtr ==
		(Namespace *) TclGetCurrentNamespace(interp)))) {
	    *nsPtrPtr = (Tcl_Namespace *) nsPtr;
	    return TCL_OK;
	}
    }
    if (SetNsNameFromAny(interp, objPtr) == TCL_OK) {
................................................................................
     * command line are valid, and report any errors.
     */

    for (i = 1;  i < objc;  i++) {
	name = TclGetString(objv[i]);
	namespacePtr = Tcl_FindNamespace(interp, name, NULL, /*flags*/ 0);
	if ((namespacePtr == NULL)
		|| (((Namespace *) namespacePtr)->flags & NS_DEAD)) {
	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
                    "unknown namespace \"%s\" in namespace delete command",
		    TclGetString(objv[i])));
	    Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "NAMESPACE",
		    TclGetString(objv[i]), NULL);
	    return TCL_ERROR;
	}
................................................................................
	/*
	 * Decrement the reference count for the cached namespace. If the
	 * namespace is dead, and there are no more references to it, free
	 * it.
	 */

	TclNsDecrRefCount(resNamePtr->nsPtr);
	if (resNamePtr->refNsPtr) {
	    TclNsDecrRefCount(resNamePtr->refNsPtr);
	}
	ckfree(resNamePtr);
    }
    objPtr->typePtr = NULL;
}
 
/*
 *----------------------------------------------------------------------
................................................................................
	     &nsPtr, &dummy1Ptr, &dummy2Ptr, &dummy);

    /*
     * If we found a namespace, then create a new ResolvedNsName structure
     * that holds a reference to it.
     */

    if ((nsPtr == NULL) || (nsPtr->flags & NS_DEAD)) {
	/*
	 * Our failed lookup proves any previously cached nsName intrep is no
	 * longer valid. Get rid of it so we no longer waste memory storing
	 * it, nor time determining its invalidity again and again.
	 */

	if (objPtr->typePtr == &nsNameType) {
	    TclFreeIntRep(objPtr);
	}
	return TCL_ERROR;
    }


    resNamePtr = ckalloc(sizeof(ResolvedNsName));
    resNamePtr->nsPtr = nsPtr;
    nsPtr->refCount++;
    if ((name[0] == ':') && (name[1] == ':')) {
	resNamePtr->refNsPtr = NULL;
    } else {
	resNamePtr->refNsPtr = (Namespace *) TclGetCurrentNamespace(interp);
	resNamePtr->refNsPtr->refCount++;
    }
    resNamePtr->refCount = 1;
    TclFreeIntRep(objPtr);
    objPtr->internalRep.twoPtrValue.ptr1 = resNamePtr;
    objPtr->typePtr = &nsNameType;
    return TCL_OK;
}

    /*
     * Instruct everyone to no longer use any allocated fields of the object.
     * Also delete the command that refers to the object at this point (if
     * it still exists) because otherwise its pointer to the object
     * points into freed memory.
     */


    if (((Command *)oPtr->command)->flags && CMD_IS_DELETED) {
	/*
	 * Something has already started the command deletion process. We can
	 * go ahead and clean up the the namespace,
	 */
    } else {
	/*
	 * The namespace must have been deleted directly.  Delete the command

    /*
     * Instruct everyone to no longer use any allocated fields of the object.
     * Also delete the command that refers to the object at this point (if
     * it still exists) because otherwise its pointer to the object
     * points into freed memory.
     */

    if (oPtr->command == NULL || ((
	Command *)oPtr->command)->flags & CMD_IS_DELETED) {
	/*
	 * Something has already started the command deletion process. We can
	 * go ahead and clean up the the namespace,
	 */
    } else {
	/*
	 * The namespace must have been deleted directly.  Delete the command

     * alternative is *so* slow...
     */

    if (pmPtr->procPtr->bodyPtr->typePtr == &tclByteCodeType) {
	ByteCode *codePtr =
		pmPtr->procPtr->bodyPtr->internalRep.twoPtrValue.ptr1;



	codePtr->nsPtr = nsPtr;
    }
    result = TclProcCompileProc(interp, pmPtr->procPtr,
	    pmPtr->procPtr->bodyPtr, nsPtr, "body of method", namePtr);
    if (result != TCL_OK) {
	goto failureReturn;
    }
................................................................................
    /*
     * NOTE: The combination of direct set of iPtr->lookupNsPtr and the use
     * of the TCL_EVAL_NOERR flag results in an evaluation configuration
     * very much like TCL_EVAL_INVOKE.
     */
    ((Interp *)interp)->lookupNsPtr
	    = (Namespace *) contextPtr->oPtr->namespacePtr;


    return TclNREvalObjv(interp, len, argObjs, TCL_EVAL_NOERR, NULL);
}

static int
FinalizeForwardCall(
    ClientData data[],
    Tcl_Interp *interp,

     * alternative is *so* slow...
     */

    if (pmPtr->procPtr->bodyPtr->typePtr == &tclByteCodeType) {
	ByteCode *codePtr =
		pmPtr->procPtr->bodyPtr->internalRep.twoPtrValue.ptr1;

	nsPtr->refCount++;
	TclNsDecrRefCount(codePtr->nsPtr);
	codePtr->nsPtr = nsPtr;
    }
    result = TclProcCompileProc(interp, pmPtr->procPtr,
	    pmPtr->procPtr->bodyPtr, nsPtr, "body of method", namePtr);
    if (result != TCL_OK) {
	goto failureReturn;
    }
................................................................................
    /*
     * NOTE: The combination of direct set of iPtr->lookupNsPtr and the use
     * of the TCL_EVAL_NOERR flag results in an evaluation configuration
     * very much like TCL_EVAL_INVOKE.
     */
    ((Interp *)interp)->lookupNsPtr
	    = (Namespace *) contextPtr->oPtr->namespacePtr;
    /* Corresponding TclNrDecrRefCount is in EvalObjvCore */ 
    ((Namespace *)contextPtr->oPtr->namespacePtr)->refCount++;
    return TclNREvalObjv(interp, len, argObjs, TCL_EVAL_NOERR, NULL);
}

static int
FinalizeForwardCall(
    ClientData data[],
    Tcl_Interp *interp,

    resPtr = objPtr->internalRep.twoPtrValue.ptr1;
    if (objPtr->typePtr == &tclCmdNameType) {
        register Command *cmdPtr = resPtr->cmdPtr;

        if ((cmdPtr->cmdEpoch == resPtr->cmdEpoch)
                && (interp == cmdPtr->nsPtr->interp)
                && !(cmdPtr->nsPtr->flags & NS_DYING)) {
            register Namespace *refNsPtr = (Namespace *)
                    TclGetCurrentNamespace(interp);

            if ((resPtr->refNsPtr == NULL)
                || ((refNsPtr == resPtr->refNsPtr)
                    && (resPtr->refNsId == refNsPtr->nsId)
                    && (resPtr->refNsCmdEpoch == refNsPtr->cmdRefEpoch))) {

    resPtr = objPtr->internalRep.twoPtrValue.ptr1;
    if (objPtr->typePtr == &tclCmdNameType) {
        register Command *cmdPtr = resPtr->cmdPtr;

        if ((cmdPtr->cmdEpoch == resPtr->cmdEpoch)
                && (interp == cmdPtr->nsPtr->interp)
                && !(cmdPtr->nsPtr->flags & NS_DEAD)) {
            register Namespace *refNsPtr = (Namespace *)
                    TclGetCurrentNamespace(interp);

            if ((resPtr->refNsPtr == NULL)
                || ((refNsPtr == resPtr->refNsPtr)
                    && (resPtr->refNsId == refNsPtr->nsId)
                    && (resPtr->refNsCmdEpoch == refNsPtr->cmdRefEpoch))) {

		Tcl_SetObjResult(interp, Tcl_NewStringObj(
			"a precompiled script jumped interps", -1));
		Tcl_SetErrorCode(interp, "TCL", "OPERATION", "PROC",
			"CROSSINTERPBYTECODE", NULL);
		return TCL_ERROR;
	    }
	    codePtr->compileEpoch = iPtr->compileEpoch;


	    codePtr->nsPtr = nsPtr;
	} else {
	    TclFreeIntRep(bodyPtr);
	}
    }

    if (bodyPtr->typePtr != &tclByteCodeType) {

		Tcl_SetObjResult(interp, Tcl_NewStringObj(
			"a precompiled script jumped interps", -1));
		Tcl_SetErrorCode(interp, "TCL", "OPERATION", "PROC",
			"CROSSINTERPBYTECODE", NULL);
		return TCL_ERROR;
	    }
	    codePtr->compileEpoch = iPtr->compileEpoch;
	    nsPtr->refCount++;
	    TclNsDecrRefCount(codePtr->nsPtr);
	    codePtr->nsPtr = nsPtr;
	} else {
	    TclFreeIntRep(bodyPtr);
	}
    }

    if (bodyPtr->typePtr != &tclByteCodeType) {

    varNsPtr = NULL;		/* Set non-NULL if a nonlocal variable. */
    *indexPtr = -3;

    if (flags & TCL_GLOBAL_ONLY) {
	cxtNsPtr = iPtr->globalNsPtr;
    } else {
	cxtNsPtr = iPtr->varFramePtr->nsPtr;



    }

    /*
     * If this namespace has a variable resolver, then give it first crack at
     * the variable resolution. It may return a Tcl_Var value, it may signal
     * to continue onward, or it may signal an error.
     */

    if ((cxtNsPtr->varResProc != NULL || iPtr->resolverPtr != NULL)
	    && !(flags & TCL_AVOID_RESOLVERS)) {
	resPtr = iPtr->resolverPtr;
	if (cxtNsPtr->varResProc) {
	    result = cxtNsPtr->varResProc(interp, varName,
		    (Tcl_Namespace *) cxtNsPtr, flags, &var);
	} else {
	    result = TCL_CONTINUE;
	}

    varNsPtr = NULL;		/* Set non-NULL if a nonlocal variable. */
    *indexPtr = -3;

    if (flags & TCL_GLOBAL_ONLY) {
	cxtNsPtr = iPtr->globalNsPtr;
    } else {
	cxtNsPtr = iPtr->varFramePtr->nsPtr;
	if (cxtNsPtr->flags & NS_DEAD) {
	    cxtNsPtr = iPtr->globalNsPtr;
	}
    }

    /*
     * If this namespace has a variable resolver, then give it first crack at
     * the variable resolution. It may return a Tcl_Var value, it may signal
     * to continue onward, or it may signal an error.
     */

    if ((cxtNsPtr->varResProc != NULL || iPtr->resolverPtr != NULL)
	    && !(flags & TCL_AVOID_RESOLVERS) && !(cxtNsPtr->flags & NS_DEAD)) {
	resPtr = iPtr->resolverPtr;
	if (cxtNsPtr->varResProc) {
	    result = cxtNsPtr->varResProc(interp, varName,
		    (Tcl_Namespace *) cxtNsPtr, flags, &var);
	} else {
	    result = TCL_CONTINUE;
	}

    list [catch foo m] $m
} -cleanup {
    unset -nocomplain m
    interp delete slave
} -result {0 {}}

# Clean up after expand tests
unset noComp l1 l2 constraints
rename l3 {}
rename run {}

 #cleanup
catch {namespace delete {*}[namespace children :: test_ns_*]}
catch {namespace delete george}
catch {interp delete test_interp}
catch {rename p ""}
catch {rename q ""}
catch {rename cmd ""}
catch {rename value:at: ""}
unset -nocomplain x
cleanupTests
return

    list [catch foo m] $m
} -cleanup {
    unset -nocomplain m
    interp delete slave
} -result {0 {}}

# Clean up after expand tests
catch {unset noComp l1 l2 constraints}
catch {rename l3 {}}
catch {rename run {}}

 #cleanup
catch {namespace delete {*}[namespace children :: test_ns_*]}
catch {namespace delete george}
catch {interp delete test_interp}
catch {rename p ""}
catch {rename q ""}
catch {rename cmd ""}
catch {rename value:at: ""}
unset -nocomplain x
cleanupTests
return

    }
    lappend ::result [coroutine cotest cotest::body]
    namespace delete cotest
    namespace eval cotest {}
    lappend ::result [cotest]
    cotest
    return $result
} -returnCodes error -cleanup {
    catch {namespace delete ::cotest}
    catch {rename cotest ""}
} -result {yieldto called in deleted namespace}
test coroutine-7.9 {yieldto context nuke: Bug a90d9331bc} -setup {
    namespace eval cotest {}
    set ::result ""
} -body {
    proc cotest::body {} {
	set y ::yieldto
	lappend ::result a
................................................................................
    }
    lappend ::result [coroutine cotest cotest::body]
    namespace delete cotest
    namespace eval cotest {}
    lappend ::result [cotest]
    cotest
    return $result
} -returnCodes error -cleanup {
    catch {namespace delete ::cotest}
    catch {rename cotest ""}
} -result {yieldto called in deleted namespace}
test coroutine-7.10 {yieldto context nuke: Bug a90d9331bc} -setup {
    namespace eval cotest {}
    set ::result ""
} -body {
    proc cotest::body {} {
	lappend ::result a
	yield OUT
................................................................................
	lappend ::result c
	return
    }
    lappend ::result [coroutine cotest cotest::body]
    lappend ::result [cotest]
    cotest
    return $result
} -returnCodes error -cleanup {
    catch {namespace delete ::cotest}
    catch {rename cotest ""}
} -result {yieldto called in deleted namespace}
test coroutine-7.11 {yieldto context nuke: Bug a90d9331bc} -setup {
    namespace eval cotest {}
    set ::result ""
} -body {
    proc cotest::body {} {
	set y ::yieldto
	lappend ::result a
................................................................................
	lappend ::result c
	return
    }
    lappend ::result [coroutine cotest cotest::body]
    lappend ::result [cotest]
    cotest
    return $result
} -returnCodes error -cleanup {
    catch {namespace delete ::cotest}
    catch {rename cotest ""}
} -result {yieldto called in deleted namespace}
test coroutine-7.12 {coro floor above street level #3008307} -body {
    proc c {} {
	yield
    }
    proc cc {} {
	coroutine C c
    }

    }
    lappend ::result [coroutine cotest cotest::body]
    namespace delete cotest
    namespace eval cotest {}
    lappend ::result [cotest]
    cotest
    return $result
} -cleanup {
    catch {namespace delete ::cotest}
    catch {rename cotest ""}
} -result {a OUT b 123 c}
test coroutine-7.9 {yieldto context nuke: Bug a90d9331bc} -setup {
    namespace eval cotest {}
    set ::result ""
} -body {
    proc cotest::body {} {
	set y ::yieldto
	lappend ::result a
................................................................................
    }
    lappend ::result [coroutine cotest cotest::body]
    namespace delete cotest
    namespace eval cotest {}
    lappend ::result [cotest]
    cotest
    return $result
} -cleanup {
    catch {namespace delete ::cotest}
    catch {rename cotest ""}
} -result {a OUT b 123 c}
test coroutine-7.10 {yieldto context nuke: Bug a90d9331bc} -setup {
    namespace eval cotest {}
    set ::result ""
} -body {
    proc cotest::body {} {
	lappend ::result a
	yield OUT
................................................................................
	lappend ::result c
	return
    }
    lappend ::result [coroutine cotest cotest::body]
    lappend ::result [cotest]
    cotest
    return $result
} -cleanup {
    catch {namespace delete ::cotest}
    catch {rename cotest ""}
} -result {a OUT b 123 c}
test coroutine-7.11 {yieldto context nuke: Bug a90d9331bc} -setup {
    namespace eval cotest {}
    set ::result ""
} -body {
    proc cotest::body {} {
	set y ::yieldto
	lappend ::result a
................................................................................
	lappend ::result c
	return
    }
    lappend ::result [coroutine cotest cotest::body]
    lappend ::result [cotest]
    cotest
    return $result
} -cleanup {
    catch {namespace delete ::cotest}
    catch {rename cotest ""}
} -result {a OUT b 123 c}
test coroutine-7.12 {coro floor above street level #3008307} -body {
    proc c {} {
	yield
    }
    proc cc {} {
	coroutine C c
    }

    namespace import -force ::tcltest::*
}

::tcltest::loadTestedCommands
catch [list package require -exact Tcltest [info patchlevel]]

testConstraint testinterpdelete [llength [info commands testinterpdelete]]



















set hidden_cmds {cd encoding exec exit fconfigure file glob load open pwd socket source tcl:encoding:dirs tcl:encoding:system tcl:file:atime tcl:file:attributes tcl:file:copy tcl:file:delete tcl:file:dirname tcl:file:executable tcl:file:exists tcl:file:extension tcl:file:isdirectory tcl:file:isfile tcl:file:link tcl:file:lstat tcl:file:mkdir tcl:file:mtime tcl:file:nativename tcl:file:normalize tcl:file:owned tcl:file:readable tcl:file:readlink tcl:file:rename tcl:file:rootname tcl:file:size tcl:file:stat tcl:file:tail tcl:file:tempfile tcl:file:type tcl:file:volumes tcl:file:writable tcl:info:cmdtype tcl:info:nameofexecutable tcl:process:autopurge tcl:process:list tcl:process:purge tcl:process:status tcl:zipfs:lmkimg tcl:zipfs:lmkzip tcl:zipfs:mkimg tcl:zipfs:mkkey tcl:zipfs:mkzip tcl:zipfs:mount tcl:zipfs:mount_data tcl:zipfs:unmount unload}

foreach i [interp slaves] {
  interp delete $i
}
 
................................................................................
    list [catch {tst eval {suicide; set a 5}} msg] $msg
} {1 {attempt to call eval in deleted interpreter}}
test interp-18.10 {eval in deleted interp, bug 495830} {
    interp create tst
    interp alias tst suicide {} interp delete tst
    list [catch {tst eval {set set set; suicide; $set a 5}} msg] $msg
} {1 {attempt to call eval in deleted interpreter}}










# Test alias deletion

test interp-19.1 {alias deletion} {
    catch {interp delete a}
    interp create a
    interp alias a foo a bar

    namespace import -force ::tcltest::*
}

::tcltest::loadTestedCommands
catch [list package require -exact Tcltest [info patchlevel]]

testConstraint testinterpdelete [llength [info commands testinterpdelete]]

testConstraint memory [llength [info commands memory]]
if {[testConstraint memory]} {
    proc getbytes {} {
	set lines [split [memory info] \n]
	return [lindex $lines 3 3]
    }
    proc leaktest {script {iterations 3}} {
	set end [getbytes]
	for {set i 0} {$i < $iterations} {incr i} {
	    uplevel 1 $script
	    set tmp $end
	    set end [getbytes]
	}
	return [expr {$end - $tmp}]
    }
}
 

set hidden_cmds {cd encoding exec exit fconfigure file glob load open pwd socket source tcl:encoding:dirs tcl:encoding:system tcl:file:atime tcl:file:attributes tcl:file:copy tcl:file:delete tcl:file:dirname tcl:file:executable tcl:file:exists tcl:file:extension tcl:file:isdirectory tcl:file:isfile tcl:file:link tcl:file:lstat tcl:file:mkdir tcl:file:mtime tcl:file:nativename tcl:file:normalize tcl:file:owned tcl:file:readable tcl:file:readlink tcl:file:rename tcl:file:rootname tcl:file:size tcl:file:stat tcl:file:tail tcl:file:tempfile tcl:file:type tcl:file:volumes tcl:file:writable tcl:info:cmdtype tcl:info:nameofexecutable tcl:process:autopurge tcl:process:list tcl:process:purge tcl:process:status tcl:zipfs:lmkimg tcl:zipfs:lmkzip tcl:zipfs:mkimg tcl:zipfs:mkkey tcl:zipfs:mkzip tcl:zipfs:mount tcl:zipfs:mount_data tcl:zipfs:unmount unload}

foreach i [interp slaves] {
  interp delete $i
}
 
................................................................................
    list [catch {tst eval {suicide; set a 5}} msg] $msg
} {1 {attempt to call eval in deleted interpreter}}
test interp-18.10 {eval in deleted interp, bug 495830} {
    interp create tst
    interp alias tst suicide {} interp delete tst
    list [catch {tst eval {set set set; suicide; $set a 5}} msg] $msg
} {1 {attempt to call eval in deleted interpreter}}

test interp-10.11 {test for leaks in simple creation/deletion} -setup {
} -constraints memory -body {
    leaktest {
	interp create slave
	interp delete slave
    }
} -cleanup {
} -result 0

# Test alias deletion

test interp-19.1 {alias deletion} {
    catch {interp delete a}
    interp create a
    interp alias a foo a bar

    namespace eval test_ns_1 {
        proc p {} {
            namespace delete [namespace current]
            return [namespace current]
        }
    }
    list [test_ns_1::p] [catch {test_ns_1::p} msg] $msg
} {::test_ns_1 1 {invalid command name "test_ns_1::p"}}
test namespace-7.2 {Tcl_DeleteNamespace, no active call frames in ns} {
    namespace eval test_ns_2 {
        proc p {} {
            return [namespace current]
        }
    }
    list [test_ns_2::p] [namespace delete test_ns_2]
................................................................................
    trace add command ns1 delete {
	namespace delete ns1
    }
} -body {
    # No segmentation fault given --enable-symbols=mem.
    namespace delete ns1
} -result {}
















































test namespace-8.1 {TclTeardownNamespace, delete global namespace} {
    catch {interp delete test_interp}
    interp create test_interp
    interp eval test_interp {
        namespace eval test_ns_1 {
            namespace export p
................................................................................
    namespace eval test_ns_1 {
        proc p {} {
            namespace delete [namespace current]
            return [namespace current]
        }
    }
    test_ns_1::p
} -result {::test_ns_1}
test namespace-35.2 {FreeNsNameInternalRep, resulting ref count == 0} {
    namespace eval test_ns_1 {
        proc q {} {
            return [namespace current]
        }
    }
    list [test_ns_1::q] \
................................................................................
	}
	proc bar {} {
	    namespace delete [namespace current]
	}
	namespace ensemble create
    }
    list [ns foo] [info exist ns::x]
} {1 0}
test namespace-46.9 {ensemble: configuring really configures things} {
    namespace eval ns {
	namespace ensemble create -map {a a} -prefixes 0
    }
    set result [list [catch {ns x} msg] $msg]
    namespace ensemble configure ns -map {b b}
    lappend result [catch {ns x} msg] $msg
................................................................................
    namespace eval ::test_ns_4 {
	namespace path {::test_ns_2 ::test_ns_3 ::test_ns_1}
	proc bar {} {
	    list [foo] [namespace delete ::test_ns_2] [foo]
	}
	bar
    }
    # Should the result be "2 {} {2 3 2 1}" instead?
} -result {2 {} {2 3 1 1}} -cleanup {
    catch {namespace delete ::test_ns_1}
    catch {namespace delete ::test_ns_2}
    catch {namespace delete ::test_ns_3}
    catch {namespace delete ::test_ns_4}
}
test namespace-51.14 {name resolution path control} -setup {
    foreach cmd [info commands foo*] {
................................................................................
	proc abc {} {}
	proc def {} {}
	trace add command abc delete "rename ::testing::def {}; #"
	trace add command def delete "rename ::testing::abc {}; #"
    }
    namespace delete ::testing
} {}
test namespace-56.2 {bug f97d4ee020: mutually-entangled deletion} {





    namespace eval ::testing {
	namespace eval abc {proc xyz {} {}}
	namespace eval def {proc xyz {} {}}
	trace add command abc::xyz delete "namespace delete ::testing::def {}; #"
	trace add command def::xyz delete "namespace delete ::testing::abc {}; #"
    }
    namespace delete ::testing
} {}




test namespace-56.3 {bug f97d4ee020: mutually-entangled deletion} {
    namespace eval ::testing {
	variable gone {}
	oo::class create CB {
	    variable cmd
	    constructor other {set cmd $other}
	    destructor {rename $cmd {}; lappend ::testing::gone $cmd}

    namespace eval test_ns_1 {
        proc p {} {
            namespace delete [namespace current]
            return [namespace current]
        }
    }
    list [test_ns_1::p] [catch {test_ns_1::p} msg] $msg
} {:: 1 {invalid command name "test_ns_1::p"}}
test namespace-7.2 {Tcl_DeleteNamespace, no active call frames in ns} {
    namespace eval test_ns_2 {
        proc p {} {
            return [namespace current]
        }
    }
    list [test_ns_2::p] [namespace delete test_ns_2]
................................................................................
    trace add command ns1 delete {
	namespace delete ns1
    }
} -body {
    # No segmentation fault given --enable-symbols=mem.
    namespace delete ns1
} -result {}

test namespace-7.9 {
    Looking up a command when the current namespace is deleted
} -body {
    list [catch {
	namespace eval ns1 {
	    proc p1 {} {}
	    namespace delete [namespace current]
	    p1
	}
    } msg] $msg
} -result {1 {invalid command name "p1"}} 

test namespace-7.10 {
    A namespace can be looked up during the delete process.
} -body {
    variable res failure 
    namespace eval ns1 {
	namespace ensemble create
	trace add command [namespace current] delete [list ::apply [list args {
	    set [namespace parent]::res triggered
	} [namespace current]]]
	namespace delete [namespace current]
    }
    return $res
} -cleanup {
    unset res
} -result triggered 

test namespace-7.11 {
    Commands are deleted before variables.
} -body {
    variable res failure 
    namespace eval ns1 {
	namespace ensemble create
	namespace upvar [namespace parent] res res
	proc p1 {} {}
	trace add command p1 delete [list ::apply [list args {
	    variable res
	    set res triggered
	} [namespace current]]]
	namespace delete [namespace current]
    }
    return $res
} -cleanup {
    unset res
} -result triggered

test namespace-8.1 {TclTeardownNamespace, delete global namespace} {
    catch {interp delete test_interp}
    interp create test_interp
    interp eval test_interp {
        namespace eval test_ns_1 {
            namespace export p
................................................................................
    namespace eval test_ns_1 {
        proc p {} {
            namespace delete [namespace current]
            return [namespace current]
        }
    }
    test_ns_1::p
} -result {::}
test namespace-35.2 {FreeNsNameInternalRep, resulting ref count == 0} {
    namespace eval test_ns_1 {
        proc q {} {
            return [namespace current]
        }
    }
    list [test_ns_1::q] \
................................................................................
	}
	proc bar {} {
	    namespace delete [namespace current]
	}
	namespace ensemble create
    }
    list [ns foo] [info exist ns::x]
} {0 0}
test namespace-46.9 {ensemble: configuring really configures things} {
    namespace eval ns {
	namespace ensemble create -map {a a} -prefixes 0
    }
    set result [list [catch {ns x} msg] $msg]
    namespace ensemble configure ns -map {b b}
    lappend result [catch {ns x} msg] $msg
................................................................................
    namespace eval ::test_ns_4 {
	namespace path {::test_ns_2 ::test_ns_3 ::test_ns_1}
	proc bar {} {
	    list [foo] [namespace delete ::test_ns_2] [foo]
	}
	bar
    }

} -result {2 {} {2 3 2 2 1}} -cleanup {
    catch {namespace delete ::test_ns_1}
    catch {namespace delete ::test_ns_2}
    catch {namespace delete ::test_ns_3}
    catch {namespace delete ::test_ns_4}
}
test namespace-51.14 {name resolution path control} -setup {
    foreach cmd [info commands foo*] {
................................................................................
	proc abc {} {}
	proc def {} {}
	trace add command abc delete "rename ::testing::def {}; #"
	trace add command def delete "rename ::testing::abc {}; #"
    }
    namespace delete ::testing
} {}
test namespace-56.2 {bug f97d4ee020: mutually-entangled deletion} -setup {
    # Since this test deletes the global namespace, isolate the carnage in a
    # slave.
    interp create slave
} -body {
    slave eval {
	namespace eval ::testing {
	    namespace eval abc {proc xyz {} {}}
	    namespace eval def {proc xyz {} {}}
	    trace add command abc::xyz delete "namespace delete ::testing::def {}; #"
	    trace add command def::xyz delete "namespace delete ::testing::abc {}; #"
	}
	namespace delete ::testing

    }
} -cleanup {
    interp delete slave
} -result {}
test namespace-56.3 {bug f97d4ee020: mutually-entangled deletion} {
    namespace eval ::testing {
	variable gone {}
	oo::class create CB {
	    variable cmd
	    constructor other {set cmd $other}
	    destructor {rename $cmd {}; lappend ::testing::gone $cmd}

	constructor {} {
	    proc localcmdexists {} {}
	    set state ok
	    my eval {upvar 0 ::result result}
	}
	method nuke {} {
	    namespace delete [namespace current]
	    return $result
	}
	destructor {
	    lappend result [self] $state [info commands localcmdexists]
	}
    }
    cls create obj
    namespace delete [info object namespace obj]
    [cls create obj2] nuke
} -match glob -result {::obj ok localcmdexists ::obj2 ok localcmdexists}
test oo-3.6 {basic test of OO functionality: errors in destructor} -setup {

	constructor {} {
	    proc localcmdexists {} {}
	    set state ok
	    my eval {upvar 0 ::result result}
	}
	method nuke {} {
	    namespace delete [namespace current]
	    return $::result
	}
	destructor {
	    lappend ::result [self] $state [info commands localcmdexists]
	}
    }
    cls create obj
    namespace delete [info object namespace obj]
    [cls create obj2] nuke
} -match glob -result {::obj ok localcmdexists ::obj2 ok localcmdexists}
test oo-3.6 {basic test of OO functionality: errors in destructor} -setup {

    proc callback {old - -} {
        variable x "$old exists: [namespace which -command $old]"
    }
    namespace eval ::foo {proc bar {} {}}
    trace add command ::foo::bar delete [namespace code callback]
    namespace eval ::foo namespace delete ::foo
    set x
} {::foo::bar exists: }

test trace-34.6 {Bug 1458266} -setup {
    proc dummy {} {}
    proc stepTraceHandler {cmdString args} {
        variable log
        append log "[expr {[info level] - 1}]: [lindex [split $cmdString] 0]\n"
        dummy

    proc callback {old - -} {
        variable x "$old exists: [namespace which -command $old]"
    }
    namespace eval ::foo {proc bar {} {}}
    trace add command ::foo::bar delete [namespace code callback]
    namespace eval ::foo namespace delete ::foo
    set x
} {::foo::bar exists: ::foo::bar}

test trace-34.6 {Bug 1458266} -setup {
    proc dummy {} {}
    proc stepTraceHandler {cmdString args} {
        variable log
        append log "[expr {[info level] - 1}]: [lindex [split $cmdString] 0]\n"
        dummy

	lappend result [catch {set foo} msg] $msg
        namespace delete ::test_ns_var
	lappend result [catch {set foo 3} msg] $msg
	lappend result [catch {set foo(3) 3} msg] $msg
    }
    p
} {0 2 1 {can't set "foo": upvar refers to variable in deleted namespace} 1 {can't set "foo(3)": upvar refers to variable in deleted namespace}}
test var-1.16 {TclLookupVar, resurrect variable via upvar to deleted namespace: uncompiled code path} {

    namespace eval test_ns_var {
	variable result
        namespace eval subns {
	    variable foo 2
	}
	upvar 0 subns::foo foo
	lappend result [catch {set foo} msg] $msg
        namespace delete subns
	lappend result [catch {set foo 3} msg] $msg
	lappend result [catch {set foo(3) 3} msg] $msg
        namespace delete [namespace current]

	set result



    }
} {0 2 1 {can't set "foo": upvar refers to variable in deleted namespace} 1 {can't set "foo(3)": upvar refers to variable in deleted namespace}}
test var-1.17 {TclLookupVar, resurrect array element via upvar to deleted array: compiled code path} {

    namespace eval test_ns_var {
	variable result
	proc p {} {
	    array set x {1 2 3 4}
	    upvar 0 x(1) foo
	    lappend result [catch {set foo} msg] $msg
	    unset x
	    lappend result [catch {set foo 3} msg] $msg
	}
	set result [p]
        namespace delete [namespace current]
	set result
    }

} {0 2 1 {can't set "foo": upvar refers to element in deleted array}}
test var-1.18 {TclLookupVar, resurrect array element via upvar to deleted array: uncompiled code path} -setup {
    unset -nocomplain test_ns_var::x
} -body {
    namespace eval test_ns_var {
	variable result {}

	variable x
	array set x {1 2 3 4}
	upvar 0 x(1) foo
	lappend result [catch {set foo} msg] $msg
	unset x
	lappend result [catch {set foo 3} msg] $msg
        namespace delete [namespace current]
	set result
    }



} -result {0 2 1 {can't set "foo": upvar refers to element in deleted array}}
test var-1.19 {TclLookupVar, right error message when parsing variable name} -body {
    [format set] thisvar(doesntexist)
} -returnCodes error -result {can't read "thisvar(doesntexist)": no such variable}

test var-2.1 {Tcl_LappendObjCmd, create var if new} {
    catch {unset x}
................................................................................
test var-24.24 {array default unset: errors} -setup {
    unset -nocomplain ary
} -body {
    array default unset ary x
} -returnCodes error -cleanup {
    unset -nocomplain ary
} -result * -match glob
 

































































catch {namespace delete ns}
catch {unset arr}
catch {unset v}

catch {rename getbytes ""}
catch {rename p ""}
catch {namespace delete test_ns_var}

	lappend result [catch {set foo} msg] $msg
        namespace delete ::test_ns_var
	lappend result [catch {set foo 3} msg] $msg
	lappend result [catch {set foo(3) 3} msg] $msg
    }
    p
} {0 2 1 {can't set "foo": upvar refers to variable in deleted namespace} 1 {can't set "foo(3)": upvar refers to variable in deleted namespace}}
test var-1.16 {TclLookupVar, resurrect variable via upvar to deleted namespace: uncompiled code path} -body {
    variable result
    namespace eval test_ns_var {
	variable result
        namespace eval subns {
	    variable foo 2
	}
	upvar 0 subns::foo foo
	lappend [namespace parent]::result [catch {set foo} msg] $msg
        namespace delete subns
	lappend [namespace parent]::result [catch {set foo 3} msg] $msg
	lappend [namespace parent]::result [catch {set foo(3) 3} msg] $msg
        namespace delete [namespace current]
    }
    set result
} -cleanup {
    unset result
} -result {0 2 1 {can't set "foo": upvar refers to variable in deleted namespace} 1 {can't set "foo(3)": upvar refers to variable in deleted namespace}}


test var-1.17 {TclLookupVar, resurrect array element via upvar to deleted array: compiled code path} {
    variable result {}
    namespace eval test_ns_var {

	proc p {} {
	    array set x {1 2 3 4}
	    upvar 0 x(1) foo
	    lappend [namespace parent]::result [catch {set foo} msg] $msg
	    unset x
	    lappend [namespace parent]::result [catch {set foo 3} msg] $msg
	}
	set result [p]
        namespace delete [namespace current]

    }
    set result
} {0 2 1 {can't set "foo": upvar refers to element in deleted array}}
test var-1.18 {TclLookupVar, resurrect array element via upvar to deleted array: uncompiled code path} -setup {
    unset -nocomplain test_ns_var::x
} -body {

    variable result {}
    namespace eval test_ns_var {
	variable x
	array set x {1 2 3 4}
	upvar 0 x(1) foo
	lappend [namespace parent]::result [catch {set foo} msg] $msg
	unset x
	lappend [namespace parent]::result [catch {set foo 3} msg] $msg
        namespace delete [namespace current]

    }
    set result
} -cleanup {
    unset result
} -result {0 2 1 {can't set "foo": upvar refers to element in deleted array}}
test var-1.19 {TclLookupVar, right error message when parsing variable name} -body {
    [format set] thisvar(doesntexist)
} -returnCodes error -result {can't read "thisvar(doesntexist)": no such variable}

test var-2.1 {Tcl_LappendObjCmd, create var if new} {
    catch {unset x}
................................................................................
test var-24.24 {array default unset: errors} -setup {
    unset -nocomplain ary
} -body {
    array default unset ary x
} -returnCodes error -cleanup {
    unset -nocomplain ary
} -result * -match glob


test var-25.0 {Look up command from deleted namespace} -body {
    variable msg
    set result [namespace eval test_ns_var {
        namespace delete [namespace current]
	# Doesn't result in a panic with message called Tcl_FindHashEntry on
	# deleted table when Tcl_FindCommand is called to find resolve "catch"  
	catch {lindex success} [namespace parent]::msg
    }]
    list $result $msg
}  -result {0 success} 

test var-25.1 {set a variable after deleting current namespace} {
    variable msg {}
    set result [namespace eval test_ns_var {
	variable var1
        namespace delete [namespace current]
	set var1 one
	namespace which -variable var1
    }]
} {::var1}

test var-25.3 {The current namespace after deleting the current namespace} {
    variable msg {}
    namespace eval test_ns_var {
	variable var1
        namespace delete [namespace current]
	namespace current
    }
} :: 

test var-25.4 {
    declare a namespace variable after deleting the current namespace
} {
    variable msg {}
    namespace eval test_ns_var {
	variable var1
        namespace delete [namespace current]
	variable var1
	set var1 one
	namespace which -variable var1
    }
} {::var1}

test var-25.5 {
    create a procedure after deleting the current namespace
} {
    namespace eval test_ns_var {
        namespace delete [namespace current]
	proc p1 {} {return hello}
	list [namespace which p1] [p1]
    } $msg
} {::p1 hello}

test var-25.6 {
    create a namespace after deleting the current namespace
} {
    namespace eval test_ns_var {
        namespace delete [namespace current]
	namespace eval one {namespace current}
    }
} {::one}

 

catch {namespace delete ns}
catch {unset arr}
catch {unset v}

catch {rename getbytes ""}
catch {rename p ""}
catch {namespace delete test_ns_var}

test-tcl: ${TCLTEST_EXE}
	$(SHELL_ENV) ./${TCLTEST_EXE} $(TOP_DIR)/tests/all.tcl $(TESTFLAGS)

gdb-test: ${TCLTEST_EXE}
	@echo "set env @[email protected]=`pwd`:$${@[email protected]}" > gdb.run
	@echo "set env TCL_LIBRARY=${TCL_BUILDTIME_LIBRARY}" >> gdb.run
	@echo "set args $(TOP_DIR)/tests/all.tcl $(TESTFLAGS) -singleproc 1" >> gdb.run
	$(GDB) ./${TCLTEST_EXE} --command=gdb.run
	@rm gdb.run

lldb-test: ${TCLTEST_EXE}
	@echo "settings set target.env-vars @[email protected]=`pwd`:$${@[email protected]}" > lldb.run
	@echo "settings set target.env-vars TCL_LIBRARY=${TCL_BUILDTIME_LIBRARY}" >> lldb.run
	$(LLDB) --source lldb.run ./${TCLTEST_EXE} -- $(TOP_DIR)/tests/all.tcl \

test-tcl: ${TCLTEST_EXE}
	$(SHELL_ENV) ./${TCLTEST_EXE} $(TOP_DIR)/tests/all.tcl $(TESTFLAGS)

gdb-test: ${TCLTEST_EXE}
	@echo "set env @[email protected]=`pwd`:$${@[email protected]}" > gdb.run
	@echo "set env TCL_LIBRARY=${TCL_BUILDTIME_LIBRARY}" >> gdb.run
	@echo "set args $(TOP_DIR)/tests/all.tcl $${TESTFLAGS} -singleproc 1" >> gdb.run
	$(GDB) ./${TCLTEST_EXE} --command=gdb.run
	@rm gdb.run

lldb-test: ${TCLTEST_EXE}
	@echo "settings set target.env-vars @[email protected]=`pwd`:$${@[email protected]}" > lldb.run
	@echo "settings set target.env-vars TCL_LIBRARY=${TCL_BUILDTIME_LIBRARY}" >> lldb.run
	$(LLDB) --source lldb.run ./${TCLTEST_EXE} -- $(TOP_DIR)/tests/all.tcl \