The test stress/proxy-helper-this.js.default fails when built with cloop enabled because returnEarlyFromInfiniteLoopsForFuzzing is not implemented. It's not a perfect solution, but we've dealt with this in the past (e.g. bug #216406) by sabotaging the test whenever JIT is disabled.
Pull request: https://github.com/WebKit/WebKit/pull/15029
Committed 265323@main (ab5348ee83f6): <https://commits.webkit.org/265323@main> Reviewed commits have been landed. Closing PR #15029 and removing active labels.
<rdar://problem/111049127>