The problem is that changes introduced by r264813 sets `LD_LIBRARY_PATH` wrongly. This can cause a variety of issues depending on configuration fo the remote runner.
Created attachment 406021 [details] Patch
Comment on attachment 406021 [details] Patch Win failure is very likely unrelated, since this change is Linux specific. Thank you for the review!
Committed r265312: <https://trac.webkit.org/changeset/265312> All reviewed patches have been landed. Closing bug and clearing flags on attachment 406021 [details].
<rdar://problem/66600583>