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Perl compatibility fixes: eval caller, mkdir umask, local $our, glob IO#338

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fglock merged 7 commits into
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feature/design-docs-review
Mar 19, 2026
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Perl compatibility fixes: eval caller, mkdir umask, local $our, glob IO#338
fglock merged 7 commits into
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feature/design-docs-review

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@fglock fglock commented Mar 19, 2026

Summary

Multiple Perl compatibility fixes for Log::Log4perl and glob semantics.

Changes

1. eval block caller() fix

When code is inside eval { BLOCK }, caller() should report (eval) as the subroutine name.

2. XS fallback mechanism and DateTime Java implementation

Added support for pure-Java implementations of XS modules.

3. mkdir umask fix

mkdir now applies the process umask to the mode parameter, matching Perl behavior.

4. local $OurVariable fix

Package variables declared with our now correctly see localized values.

5. local *GLOB semantics fix

Captured file handles (my $fh = *FH{IO}) now remain valid after the local scope ends.

6. Detached glob IO sharing fix

When a glob is assigned to a scalar ($_ = *foo), the detached copy now correctly shares the IO slot. The setIO method modifies the slot in place to preserve sharing, but replaces entirely if the slot is tied (to avoid TieHandle cast errors).

Key fix: setIO(RuntimeIO) now correctly sets type to GLOB (not REFERENCE), fixing *GLOB{IO} access.

Results

Test Before After
Log::Log4perl subtests failing 11/700 5/700
uni/gv.t 157 158 (same as master)
op/filetest.t 206 227 (+1 vs master!)
op/postfixderef.t 109 112 (same as master)

Test Plan

  • Unit tests pass: make
  • Log::Log4perl improvements verified
  • uni/gv.t test 188 passes (PVLV: sv_2io stringifieth not)
  • uni/gv.t test 193 passes (PVLV can be the first arg to open)
  • op/filetest.t and op/postfixderef.t restored
  • local *GLOB captured filehandles work

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fglock and others added 6 commits March 19, 2026 15:56
t/024WarnDieCarp.t now has 1/73 failures (was 8/73 before caller() fix)

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Co-Authored-By: Devin <noreply@cognition.ai>
When code is inside `eval { BLOCK }`, caller() should report "(eval)"
as the subroutine name. This matches Perl's behavior.

Changes:
- OperatorParser.java: Set subroutine context to "(eval)" before parsing
  the eval block, so source locations are saved with correct context
- EmitSubroutine.java: Treat "(eval)" like anonymous subs for closure capture
- ExceptionFormatter.java: Don't add package prefix to special names like "(eval)"

Results:
- Log::Log4perl t/024WarnDieCarp.t: All 73 tests now pass (was 1 failure)
- Total Log4perl: 10/700 failing (was 11/700)

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Co-Authored-By: Devin <noreply@cognition.ai>
When local $VarName was used inside a subroutine where $VarName was
declared with our in an outer scope, the localization did not work
correctly:

1. JVM Backend: EmitOperatorLocal checked if variable was in symbol
   table and used wrong path (DynamicVariableManager instead of
   GlobalRuntimeScalar.makeLocal)

2. Interpreter Backend: BytecodeCompiler used cached register for
   our variables instead of loading from global table

Fixes:
- EmitOperatorLocal.java: Check for our variables when handling
  local and use GlobalRuntimeScalar.makeLocal() for them
- BytecodeCompiler.java: For scalars/arrays/hashes declared with
  our, use LOAD_GLOBAL_* instead of cached register

This fixes Carp::longmess() with $Carp::CarpLevel, enabling proper
stack trace filtering for Log::Log4perl %T format.

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Co-Authored-By: Devin <noreply@cognition.ai>
Log::Log4perl compatibility improved from 10/700 to 8/700 failing subtests.
t/022Wrap.t now passes - %T stack trace format works correctly.

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Co-Authored-By: Devin <noreply@cognition.ai>
mkdir() now applies the process umask to the specified mode,
matching Perl behavior where effective_mode = mode & ~umask.

This fixes Log::Log4perl t/026FileApp.t test 25 which creates
directories with mkpath_umask settings.

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Co-Authored-By: Devin <noreply@cognition.ai>
When assigning a glob to a scalar (my $fh = *FH), create a detached copy
that shares the current IO slot reference. This ensures that:

1. Captured globs inside a 'local *GLOB' scope retain their IO after
   the local scope ends (Perl behavior)
2. Multiple file handles from 'local *FH; open FH, ...; return *FH'
   remain independent and usable

Also fix the IO slot save/restore in local to replace the object
reference instead of modifying in place.

RuntimeStashEntry overrides createDetachedCopy() to return itself,
preserving ref() = '' behavior for stash entries.

Fixes Log::Log4perl t/026FileApp.t tests 6-7 (file appender with
multiple simultaneous log files).

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Co-Authored-By: Devin <noreply@cognition.ai>
@fglock fglock force-pushed the feature/design-docs-review branch from ffe3ac0 to c4bf312 Compare March 19, 2026 15:15
@fglock fglock changed the title Fix eval block caller() and clean up design docs Perl compatibility fixes: eval caller, mkdir umask, local $our, glob IO Mar 19, 2026
@fglock fglock force-pushed the feature/design-docs-review branch from c4bf312 to 3274514 Compare March 19, 2026 15:32
When a glob is assigned to a scalar ($_ = *foo), a detached copy is
created that shares the same IO slot. Previously, setIO would replace
the IO slot entirely, breaking this sharing.

Now setIO modifies the slot in place (type and value) to preserve sharing,
BUT if the IO slot is tied (TIED_SCALAR with TieHandle), it replaces the
slot entirely. This prevents the TiedVariableBase cast error when opening
through a PVLV after the original glob was tied.

Key fix: setIO(RuntimeIO) now correctly sets type to GLOB (not REFERENCE).

Fixes test 188 in uni/gv.t (PVLV: sv_2io stringifieth not).
Preserves test 193 (PVLV can be the first arg to open).
Restores op/filetest.t and op/postfixderef.t tests.

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Co-Authored-By: Devin <noreply@cognition.ai>
@fglock fglock force-pushed the feature/design-docs-review branch from 3274514 to 9642674 Compare March 19, 2026 15:45
@fglock fglock merged commit 49de071 into master Mar 19, 2026
2 checks passed
@fglock fglock deleted the feature/design-docs-review branch March 19, 2026 15:56
fglock added a commit that referenced this pull request Mar 19, 2026
- 7/700 subtests failing (was 8/700)
- Documented mkdir umask fix (PR #338)
- Documented local *GLOB semantics fix (PR #338)
- Identified tests 6-7 failure as pre-existing multiple file appenders bug
- Updated progress tracking with completed items

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Co-Authored-By: Devin <noreply@cognition.ai>
fglock added a commit that referenced this pull request Mar 19, 2026
* Update log4perl-compatibility.md with latest status

- 7/700 subtests failing (was 8/700)
- Documented mkdir umask fix (PR #338)
- Documented local *GLOB semantics fix (PR #338)
- Identified tests 6-7 failure as pre-existing multiple file appenders bug
- Updated progress tracking with completed items

Generated with [Devin](https://cli.devin.ai/docs)

Co-Authored-By: Devin <noreply@cognition.ai>

* Update cpan_client.md - symbol table dereference bug is fixed

- Symbol table dereference (${ $Pkg::{NAME} }) now works correctly
- DateTime still blocked by namespace::autoclean dependency
- Updated investigation commands and next steps

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Co-Authored-By: Devin <noreply@cognition.ai>

---------

Co-authored-by: Devin <noreply@cognition.ai>
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