When loading layout test results, if the response from the server is anything other than JSON (JSON parse fails), there is currently no error handling. This causes the spinner animation to continue infinitely.
<rdar://problem/113770542>
Committed 266831@main (f92c0d78c636): <https://commits.webkit.org/266831@main> Reviewed commits have been landed. Closing PR #16620 and removing active labels.