DateTime::subtract fails when nanosecond result crosses midnight
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已经有一个关联 PR 被合并了。
- #1724 来自 @fglock —— 已合并
评估
调研方向
The failure is in DateTime 1.67's t/10subtract.t at line 156, where subtracting one nanosecond from midnight passes nanosecond => -1 into DateTime validation. Start by running that focused test on the PerlOnJava JVM and interpreter backends and compare with system Perl. Done means the test passes on both backends. Linked PR #1724 is already open against this issue, so check it before starting.
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描述
Summary
DateTime::subtract fails when a subtraction crosses midnight by one nanosecond. It passes nanosecond => -1 into DateTime's validation instead of normalizing the result to the previous second/day.
Reproduction
DateTime 1.67's t/10subtract.t reaches the failing case at line 156, subtracting one nanosecond from midnight. PerlOnJava aborts after the preceding 37 assertions with an invalid nanosecond error.
The focused test passes with system Perl 5.45.4 (perl5/perl) and DateTime's full 1.67 suite passes on that oracle. The focused test fails on both PerlOnJava execution backends: JVM and interpreter.
This was observed during CPAN release acceptance run 20261009-194921-60036.
Impact
The failure is in DateTime's pure-Perl subtraction path. DateTime currently has about 950 unique runtime reverse dependants (558 with recent CPAN releases), including Monitoring-Sneck, Travel-Status-MOTIS, BarefootJS, App-ElasticSearch-Utilities, Test2-Harness-UI, and Dist-Zilla.
Other DateTime failures in this acceptance run involve goto from a sort comparator and are tracked separately in #1634; this issue is only for nanosecond normalization.
- 主要语言
- Perl
- 星标
- 64
- 派生
- 7
- 平均合并
- 5 小时 7 分钟
- 30 天内合并 PR
- 201
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