Parser rejects our self-reference in its initializer under strict vars

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Évaluation

Difficulté
4/5
Temps estimé
3-5 jours
Accessibilité débutants
48/100
Type d'issue
Bug
Clarté
Plutôt claire
Activité
Active
Stack technique
java, perl
Domaine
backend

Piste de recherche

Start by tracing how our declarations are handled and how strict 'vars' resolves initializer references in both the JVM and interpreter backends. Reproduce with our $V = $V = 119; under strict vars and compare with system Perl. Done when both backends compile the case and leave $V equal to 119.

Rédigé par le modèle d'indexation à partir du texte de l'issue.

Description

area:parser bug

Summary

The parser rejects a valid our declaration when its initializer reads the variable being declared under strict 'vars'. This breaks CPAN distribution Text-Template 1.61: t/delimiters.t stops at compile time with Global symbol "$V" requires explicit package name, before running its assertions. System Perl 5.42.2 accepts the source, and the complete upstream distribution suite passes there (22 files, 184 tests). Both PerlOnJava backends reject it.

Root cause

The declaration's initializer is resolved before the our variable is entered into the current lexical symbol table. Perl makes the our alias visible in the declaration's initializer, so the self-assignment in this valid initializer must resolve to the package variable. The package glob being materialized during declaration handling is not sufficient: strict-variable resolution uses the lexical symbol table and reports the RHS $V as undeclared.

This was independently reproduced with the one-line case in the comment. It fails under both the JVM and interpreter backends and succeeds under system Perl. The failure is included in archived CPAN run 20261104-151051-20617.

Expected behavior

our $V = $V = 119; compiles under use strict and leaves $V equal to 119, as it does in system Perl.

Langage dominant
Perl
Étoiles
65
Forks
8
Merge moyen
5 h 54 min
PR mergées (30 j)
184

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