[Webkit-unassigned] [Bug 246274] String.prototype.replace should not take fast path if the pattern is RegExp Object and the lastIndex is not numeric
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Thu Oct 13 03:07:42 PDT 2022
https://bugs.webkit.org/show_bug.cgi?id=246274
Karl Dubost <karlcow at apple.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |BrowserCompat
CC| |karlcow at apple.com
--- Comment #1 from Karl Dubost <karlcow at apple.com> ---
Modified to run in the browser console.
```
for (let i = 0; i < 3000; ++i) {
let r = /abcd/;
regexLastIndex = {};
regexLastIndex.toString = function () {
console.log(i)
return "1";
};
r.lastIndex = regexLastIndex;
"test".replace(r, "cons")
}
```
Safari result is random
Both Firefox and Chrome print until 2999.
Tested on macOS 13.0
---
Safari Technology Preview 155 18615.1.7.1
Firefox Nightly 107.0a1 10722.10.4
Google Chrome Canary 108.0.5355.0 5355.0
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