[webkit-changes] [WebKit/WebKit] 81ec83: CrashOnOverflow in CharacterClassConstructor::comp...

[Michael Saboff]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 81ec83aef725e14600ce22c49ff71ac2c12e31a4
      https://github.com/WebKit/WebKit/commit/81ec83aef725e14600ce22c49ff71ac2c12e31a4
  Author: Michael Saboff <msaboff at apple.com>
  Date:   2023-11-03 (Fri, 03 Nov 2023)

  Changed paths:
    M JSTests/stress/regexp-vflag-property-of-strings.js
    M Source/JavaScriptCore/yarr/YarrPattern.cpp

  Log Message:
  -----------
  CrashOnOverflow in CharacterClassConstructor::compareUTF32Strings
https://bugs.webkit.org/show_bug.cgi?id=260173
rdar://113872060

Reviewed by Ryosuke Niwa.

Fixed and simplified the the sort comparison function compareUTF32Strings() to properly handle
zero length strings.

Added relevant tests.

* JSTests/stress/regexp-vflag-property-of-strings.js:
* Source/JavaScriptCore/yarr/YarrPattern.cpp:
(JSC::Yarr::CharacterClassConstructor::compareUTF32Strings):

Originally-landed-as: 265870.381 at safari-7616-branch (b5b70c4574a7). rdar://117809500
Canonical link: https://commits.webkit.org/270215@main