A needle identical to the haystack won't be found by this function. Luckily it is unused except in `testb3`. Patch forthcoming
Pull request: https://github.com/WebKit/WebKit/pull/13710
Committed 264088@main (d565c2070f7a): <https://commits.webkit.org/264088@main> Reviewed commits have been landed. Closing PR #13710 and removing active labels.
<rdar://problem/109377322>