Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: e1cdfab158f3a6a858185c77afdf85f65d14b349
      
https://github.com/WebKit/WebKit/commit/e1cdfab158f3a6a858185c77afdf85f65d14b349
  Author: Kai Tamkun <[email protected]>
  Date:   2026-05-22 (Fri, 22 May 2026)

  Changed paths:
    A JSTests/stress/regexp-duplicate-named-captures-indices.js
    M Source/JavaScriptCore/runtime/RegExpMatchesArray.cpp

  Log Message:
  -----------
  YARR Interpreter Omits Named Group from `indices.groups` via Unconditional 
Tracking-Slot Reset on Backtrack
https://bugs.webkit.org/show_bug.cgi?id=312688
rdar://175122294

Reviewed by Yusuke Suzuki.

This patch adjusts createRegExpMatchesArray so that if captureIndex is 0,
the named capture is set to undefined instead of being omitted from `indices`.
Thanks to Junyoung Park (@candymate) of KAIST Hacking Lab for the fix.

Test: JSTests/stress/regexp-duplicate-named-captures-indices.js

* JSTests/stress/regexp-duplicate-named-captures-indices.js: Added.
(const.m):
(z):
* Source/JavaScriptCore/runtime/RegExpMatchesArray.h:
(JSC::createRegExpMatchesArray):

Canonical link: https://commits.webkit.org/313762@main



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