The original PR (https://bugs.webkit.org/show_bug.cgi?id=275820) was reverted (https://bugs.webkit.org/show_bug.cgi?id=276430). This bugzilla will track a new fix once the assert in 276430 is understood.
<rdar://problem/131476542>
*** Bug 276436 has been marked as a duplicate of this bug. ***
Pull request: https://github.com/WebKit/WebKit/pull/30776
Committed 281012@main (731007338146): <https://commits.webkit.org/281012@main> Reviewed commits have been landed. Closing PR #30776 and removing active labels.
Committed 280938.56@integration/ci/131476542_7310073381_safari-7619-branch (0673ab801c31): <https://commits.webkit.org/280938.56@integration/ci/131476542_7310073381_safari-7619-branch> Reviewed commits have been landed. Closing PR #1397 and removing active labels.