308586 2026-02-24 14:35:14 -0800 [macOS] imported/w3c/web-platform-tests/fullscreen/rendering/fullscreen-pseudo-class.html is a flaky text failure 2026-11-01 07:24:47 -0800 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified REOPENED InRadar P2 Normal --- 276855 1 d_delatoba mwyrzykowski ahmad.saleem792 annevk fred.wang ntim webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 2184567 0 d_delatoba 2026-02-24 14:35:14 -0800 imported/w3c/web-platform-tests/fullscreen/rendering/fullscreen-pseudo-class.html is a flaky text failure on macOS HISTORY: https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Ffullscreen%2Frendering%2Ffullscreen-pseudo-class.html DIFF: --- /Volumes/Data/Builds/Mac/Production/TestBuild308142@main/layout-test-results/imported/w3c/web-platform-tests/fullscreen/rendering/fullscreen-pseudo-class-expected.txt +++ /Volumes/Data/Builds/Mac/Production/TestBuild308142@main/layout-test-results/imported/w3c/web-platform-tests/fullscreen/rendering/fullscreen-pseudo-class-actual.txt @@ -1,3 +1,5 @@ -PASS :fullscreen pseudo-class +Harness Error (TIMEOUT), message = null +TIMEOUT :fullscreen pseudo-class Test timed out + DIFF URL: https://build.webkit.org/results/Apple-Tahoe-Release-AppleSilicon-WK2-Tests/308141%40main%20(1951)/imported/w3c/web-platform-tests/fullscreen/rendering/fullscreen-pseudo-class-pretty-diff.html REPRODUCTION: I was able to reproduce this failure on macOS Tahoe 26.2 arm64 release with the following: run-webkit-tests --no-retry --force --expect-pass --iterations 50 imported/w3c/web-platform-tests/fullscreen/rendering/fullscreen-pseudo-class.html I am going to mark expectations as pass fail while this pends investigation. 2184568 1 webkit-bug-importer 2026-02-24 14:35:20 -0800 <rdar://problem/171112681> 2184573 2 d_delatoba 2026-02-24 14:46:48 -0800 Pull request: https://github.com/WebKit/WebKit/pull/59367 2184574 3 ews-feeder 2026-02-24 14:49:42 -0800 Test gardening commit 308151@main (d8ad0835333d): <https://commits.webkit.org/308151@main> Reviewed commits have been landed. Closing PR #59367 and removing active labels. 2184586 4 d_delatoba 2026-02-24 15:13:22 -0800 It appears the timeout message in the text diff is caused by fullscreen-pseudo-class.html:20-21 where we have the following sequential awaits: await trusted_request(outer); await fullScreenChange(); await trusted_request(outer) requests the full screen change (trusted-click.js:30 requestFullscreen()) then await fullScreenChange() registers the fullscreen change listener(trusted-click.js:41). I think what is happening here is requestFullscreen() completes before addEventListener ever runs causing the listener to wait forever. The fix would be to use Promise.all() to register the listener before the request is made: await Promise.all([fullScreenChange(), trusted_request(outer)]); I'll put this fix up as a PR. 2184587 5 d_delatoba 2026-02-24 15:17:34 -0800 Pull request: https://github.com/WebKit/WebKit/pull/59368 2185578 6 ews-feeder 2026-02-27 10:34:00 -0800 Committed 308351@main (9dbb511485aa): <https://commits.webkit.org/308351@main> Reviewed commits have been landed. Closing PR #59368 and removing active labels. 2185625 7 mwyrzykowski 2026-02-27 12:15:16 -0800 Re-opening for pull request https://github.com/WebKit/WebKit/pull/59602 2266050 8 fred.wang 2026-10-19 08:30:54 -0700 Still seems marked as flaky failure: https://searchfox.org/wubkat/rev/4419a857fd628dde9bc8e2cbc8625be40f46ca70/LayoutTests/platform/mac-wk2/TestExpectations#2273 I see some recent failure on https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Ffullscreen%2Frendering%2Ffullscreen-pseudo-class.html so this may still be valid. 2272658 9 annevk 2026-11-01 07:24:47 -0800 I wonder if this became flaky again because we overwrote https://github.com/web-platform-tests/wpt/pull/58261 with https://github.com/WebKit/WebKit/commit/e14f9e6ad8ace60d9039f9ebd4264e350e712bcb ?