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Storable portable serialization loses MLDBM values and references

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评估

难度
4/5
预计耗时
3-5 天
新手友好度
55/100
Issue 类型
缺陷
描述清晰度
基本清楚
活跃度
活跃
技术栈
perl

调研方向

Start by running t/storable.t from MLDBM-2.05 on both PerlOnJava backends and compare the three failures with standard Perl. Then trace the PerlOnJava Storable freeze/thaw entry points used by MLDBM's portable serializer. Done means the upstream suite passes and focused regression coverage verifies scalar, shared, and circular references without changing standard freeze/thaw behavior.

由索引模型根据 Issue 内容生成。

描述

area:backend area:cpan-port bug

Summary

MLDBM-2.05 fails under PerlOnJava because the bundled Storable implementation loses values when MLDBM switches to portable serialization.

Reproduction

The upstream test t/storable.t uses:

use MLDBM qw(SDBM_File Storable);
...
$obj->DumpMeth('portable');
...
my $d = [17];
$o{g} = $d;
$d = '';
is($o{g}->[0], 17);

PerlOnJava returns undef instead of 17 for the final assertion. The same test also fails the circular/reference comparison assertions at lines 28 and 54.

Evidence

  • Distribution: MLDBM-2.05
  • CPAN random tester run: 20260921-102914-97159
  • Failing test: t/storable.t
  • Standard Perl: PASS, 5 test programs and 19 tests
  • PerlOnJava JVM backend: FAIL, 3 of 9 tests in t/storable.t
  • PerlOnJava interpreter backend: FAIL, identically, 3 of 9 tests
  • The target distribution is pure Perl; this is not an XS/native dependency failure.

Expected behavior

PerlOnJava's Storable::freeze/thaw implementation should preserve circular references, shared references, and scalar values when used as MLDBM's portable serializer.

Acceptance criteria

  • MLDBM-2.05 passes the complete upstream suite on both PerlOnJava backends.
  • t/storable.t passes the circular/shared-reference comparisons and the final scalar retrieval assertion.
  • Add focused project-owned regression coverage for portable Storable serialization through MLDBM, including a value whose source reference is subsequently changed.
  • Preserve standard Perl behavior for Storable::freeze/thaw and nfreeze/thaw.
主要语言
Perl
星标
64
派生
6
平均合并
4 小时 55 分钟
30 天内合并 PR
169

环境准备

  • 提供 Dockerfile 或 Docker Compose 文件
  • 没有 Pull Request 模板
  • 阅读贡献指南

从这里开始

  1. 先读完整个 Issue,再读项目的贡献指南。
  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

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