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Ticket UUID:	8ab06e31e3af6141118a547d52e4636fba9ef252
Title:	Compiled [self n] returns the namespace instead of an ambiguous subcommand error
Type:	Bug	Created on:	2026-10-12 20:36:12
Submitter:	serhiy.storchaka	Assigned to:	jan.nijtmans
Subsystem:	47. Bytecode Compiler	Severity:	Minor
Priority:	5 Medium	Last modified:	2026-10-18 21:14:13
Status:	Pending	Closed by:	nobody
Resolution:	Fixed	Closed on:
Version:	8.6.18, 9.0.5, 9.1.0

Description:
`self n` is an error ("ambiguous subcommand "n": must be call, caller, class, filter, method, namespace, next, object, or target"), but in compiled code it is accepted as `self namespace`: oo::class create C {method m {} {self n}} [C new] m The compiler accepts any prefix of `namespace`, including `n`, which is also a prefix of `next`. It has done so since [acbaf52e6e]. `na` should be the shortest accepted prefix. Since this turns code that works now into an error, the fix is for the next feature release.
User Comments:
serhiy.storchaka added on 2026-10-14 08:03:19: Proposed fix in branch compile-self-ambiguous: the compiler now requires at least `na` for `namespace`, so `self n` gets the "ambiguous subcommand" error from the command. Test oo-29.2. jan.nijtmans added on 2026-10-18 21:14:13: Now merged to [7cd1d5bbe9\|trunk] and core-9-0-branch. Merge to core-8-6-branch still to be done.