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fix: support filehandles in bundled Tie::File

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#1,578 0 comentarios 0 reacciones 0 asignados Ver en GitHub

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Ya se ha fusionado un pull request relacionado.

  • #1673 de @fglock — fusionado

Evaluación

Dificultad
4/5
Tiempo estimado
3-5 días
Aptitud para principiantes
68/100
Tipo de issue
Error
Claridad
Bien especificado
Estado de actividad
Activo
Stack tecnológico
perl
Área
tooling

Línea de trabajo

Start by locating the bundled Tie::File implementation and tracing how its second argument is stored, tested, and opened. Add a tracked regression test for tying an array to a writable filehandle, then run t/01_csv.t and t/02_cmData.t for AI::ConfusionMatrix on both the JVM and Interpreter backends; done means the filehandle form works and the upstream suite passes.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

bug

Summary

AI::ConfusionMatrix 0.010 cannot read CSV output through the bundled Tie::File when the caller supplies an open filehandle. Upstream Tie::File accepts this supported usage, but PerlOnJava's bundled shim treats the handle as a filename and produces an empty tied array.

CPAN evidence

Archived CPAN random-tester run 20260930-095822-89295 reported AI::ConfusionMatrix as FAIL:

  • t/01_csv.t: 12 of 13 assertions fail; all expected CSV lines are undef
  • t/02_cmData.t: passes

The relevant upstream suite passes unchanged under system Perl: 2 files and 19 tests, all successful.

The focused failing test reproduces on both PerlOnJava execution backends:

  • JVM backend: 12 of 13 assertions fail
  • Interpreter backend: 12 of 13 assertions fail

Minimal behavior difference

use Tie::File;
use File::Temp 'tempfile';

my $fh = tempfile();
print {$fh} "x\n";
tie my @lines, 'Tie::File', $fh or die $!;
print defined $lines[0] ? $lines[0] : 'undef', "\n";

System Perl prints x; both PerlOnJava backends print undef.

Likely cause

The bundled Tie::File implementation stores its second argument as filename and subsequently applies file tests and open to it. It needs to preserve upstream behavior when that argument is an already-open filehandle.

This distribution is pure Perl; no XS/native port or environmental prerequisite is involved.

Acceptance

  • Support tying Tie::File arrays to writable filehandles as well as pathnames.
  • Add a tracked regression test covering the filehandle form.
  • Verify the upstream AI::ConfusionMatrix CSV suite on both PerlOnJava backends.
Lenguaje dominante
Perl
Estrellas
64
Forks
7
Merge medio
5 h 6 min
PR fusionados (30 d)
200

Preparar el entorno

Primeros pasos

  1. Lee el issue completo y luego la guía de contribución del proyecto.
  2. Comenta en el issue que vas a ocuparte — evita que dos personas hagan lo mismo.
  3. Haz un fork del repositorio y trabaja en una rama.
  4. Abre un pull request que haga referencia al número del issue.

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