Created attachment 463263 [details] Reduced test case Reproduction case attached. Just set the two breakpoints mentioned in the comments, one of which is conditional, and then press the button and step over code.
<rdar://problem/101604843>
Pull request: https://github.com/WebKit/WebKit/pull/13556
Committed 264160@main (5b1242114ff5): <https://commits.webkit.org/264160@main> Reviewed commits have been landed. Closing PR #13556 and removing active labels.