288546 2025-02-25 16:11:17 -0800 REGRESSION (289984@main): imported/w3c/web-platform-tests/fullscreen/api/element-ready-allowed.html is a flak failure 2026-10-30 04:26:11 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified NEW InRadar P2 Normal --- 276855 1 rackler webkit-unassigned aboya fred.wang ntim webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 2098017 0 rackler 2025-02-25 16:11:17 -0800 Description: imported/w3c/web-platform-tests/fullscreen/api/element-ready-allowed.html The test was modified to implement fullscreen rendering update step at 289984@main and then began to flaky fail. This issue can be bisected to 289984@main by checking out the commit and then using the command: run-webkit-tests --debug --no-retry --force --exit-after-n-failures 1 --iterations=1000 imported/w3c/web-platform-tests/fullscreen/api/element-ready-allowed.html History: https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Ffullscreen%2Fapi%2Felement-ready-allowed.html&platform=mac Diff: @@ -1,3 +1,3 @@ -PASS Element ready check with enabled flag not set +FAIL Element ready check with enabled flag not set assert_unreached: document fullscreenchange event Reached unreachable code 2098018 1 webkit-bug-importer 2025-02-25 16:11:28 -0800 <rdar://problem/145613235> 2098022 2 ews-feeder 2025-02-25 16:20:26 -0800 Test gardening commit 291070@main (a2e746459bda): <https://commits.webkit.org/291070@main> Reviewed commits have been landed. Closing PR #41344 and removing active labels. 2175462 3 aboya 2026-01-27 09:27:13 -0800 This is also flaky in GTK and WPE with the same exact output and regression profile, so it's definitely a cross-platform bug. Updating expectations... The bot wpe-release completed 980 runs on the interval [302277@main-306273@main] Frecuency of results for test: imported/w3c/web-platform-tests/fullscreen/api/element-ready-allowed.html 695 times [70.9%] -> NOERROR 170 times [17.3%] -> TEXT PASS 115 times [11.7%] -> TEXT Of those 980 runs it didn't match the expectation 285 times [29.1%] Details of the type and frequency of unmatched expectations: 170 times [17.3%] -> TEXT PASS (Expected: PASS) 115 times [11.7%] -> TEXT (Expected: PASS) Flakiness factor: 43.6% - This test was flaky on 43.6% of the 980 runs analyzed, either giving different results within a single run, or a different result than in the previous run.