Tcl Source Code

[https://core.tcl-lang.org/tips/doc/trunk/tip/601.md|TIP 601] for Tcl 9 made
errors in an encoding/decoding process into script-level errors.
[https://core.tcl-lang.org/tips/doc/trunk/tip/346.md|TIP 346] subsequently
introduced <code>-strict</code> to provisionally bring make this behaviour from
Tcl 9 into Tcl 8.7.  For Tcl 9, various encoders/decoders are improved to make
them conform better to their respective specifications.  For Tcl 8.7, it made
sense to make these encoder/decoder improvements provisionally-available using
the same <code>-strict</code> option.

Now something bad happened:  Because TIP 346 was not marked as a provisional
TIP intended to bring 9.0 functionality to 8.7, the <code>-strict</code> option
was subsequently carried forward into Tcl 9.  This is an error:  The
application of provisional "-strict" option TIP 346 to Tcl 9 conflicts with TIP
601, subverting the intent of TIP 601 to provide a more correct
encoding/decoding experience in Tcl 9.0.  Provisional Tcl 8.7 interfaces should
not leak into Tcl 9.0.

I beg to differ. The ramifications of this TIP for Tcl 9 were not considered, and it is now in conflict with TIP 601.

This was intentional. TIP's are not supposed to be edited after the Vote, even more when it changes the intention.

Fixed in [https://core.tcl-lang.org/tips/info/b763993f231a7326|b763993f231a7326].

This leakage lead to issue [1213da1166], which attempted to modify TIP 601, but
that is backwards.  It is TIP 346 for 8.7 that should be modified not to
conflict with TIP 601, or with other improvements in Tcl 9.