Details

Perl 5.14 started treating Unicode variants of digits as part of the \d character class, but added a /a modifier to indicate you really only want ASCII matches. Pretty much everywhere Bugzilla uses it, we explicitly only want ASCII digits.

This is a very comprehensive patch attacking every \d regexp in Bugzilla.

This patch was written by GPT-5.3-Codex, and manually reviewed by me. Most of the changes it made make sense to me (and I removed the few that didn't, which included a few minor code correctness cleanups that I liked but were out-of-scope for this patch) and it found several places I certainly would have missed had I done it manually.

It had the following to say about the changes it made:

This patch performs a broad Perl 5.14 compatibility hardening pass for regex digit handling across the Bugzilla codebase by making digit matches ASCII-explicit where needed (primarily by adding /a or using (?a:...)), so numeric IDs, dates, routes, and parser patterns no longer depend on Unicode digit semantics; the work spans core modules, CGI/scripts, extensions, and QA tests, and multiple files under extensions and qa.

This depends on #168 landing first (which is also included in this branch), and will be much easier to review after that lands and main gets merged into this PR.

Additional info

• bug#1851421

Test Plan

?? This certainly needs testing. I'm not quite sure how. A comprehensive test would be time consuming and hard to accomplish without lots of random data. If we want to do thorough testing for this it's probably better to push it off and not include it in the Bugzilla 5.9.2 release.