Fixes an issue where catch clauses may not return undefined if the catch block is empty., instead rpotentially returning lingering values from the try block which may be used erroneously.
Pull request: https://github.com/WebKit/WebKit/pull/3484
Committed 253605@main (507c4b0c74e7): <https://commits.webkit.org/253605@main> Reviewed commits have been landed. Closing PR #3484 and removing active labels.
<rdar://problem/98900407>