This instruction's current implementation triggers assertion failures in both LLInt and air backends. Patch forthcoming
Pull request: https://github.com/WebKit/WebKit/pull/9538
Committed 259958@main (6055ee639258): <https://commits.webkit.org/259958@main> Reviewed commits have been landed. Closing PR #9538 and removing active labels.
<rdar://problem/105127438>