223973 2021-03-30 17:52:05 -0700 [ macOS Debug ] imported/w3c/web-platform-tests/xhr/xhr-timeout-longtask.any.worker.html is a flakey text failure 2021-05-05 07:17:52 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified NEW InRadar P2 Normal --- 1 jenner webkit-unassigned webkit-bot-watchers-bugzilla webkit-bug-importer youennf oldest_to_newest 1745431 0 jenner 2021-03-30 17:52:05 -0700 imported/w3c/web-platform-tests/xhr/xhr-timeout-longtask.any.worker.html is a flakey text failure in macOS Debug. Most recently, the failures have been more common in BigSur on Apple Silicon Macs. However, the test has been flakey for a while, and has occurred in BigSur Debug on Intel, as well as in Catalina egpu process. HISTORY URL: https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fxhr%2Fxhr-timeout-longtask.any.worker.html&platform=mac TEXT DIFF: -PASS Long tasks should not trigger load timeout +FAIL Long tasks should not trigger load timeout assert_unreached: [object XMLHttpRequestProgressEvent] Reached unreachable code 1745433 1 jenner 2021-03-30 17:52:53 -0700 Test is extremely flakey on Apple Silicon, and even more so on Intel. I did attempt to reproduce it, but was unable to on my Intel Mac. I would try on an Apple Silicon Mac, but I don't have access to such a machine. 1745435 2 webkit-bug-importer 2021-03-30 17:54:26 -0700 <rdar://problem/76030809> 1745442 3 jenner 2021-03-30 18:24:53 -0700 Updated test expectations to Pass Failure here: https://trac.webkit.org/changeset/275252/webkit 1756934 4 youennf 2021-05-05 07:17:52 -0700 It might be that the load does not complete in 100 ms as the debug bot is slow, there is only 50ms to do this before hitting the timeout. We could try reducing load delay to 10 ms, but I am not sure 140ms will be sufficient anyway in debug. I think we can either skip the test in Debug or leave it as Pass/Failure. Pass/Failure is probably good enough.