Bug 315618

Summary: [macOS release] imported/w3c/web-platform-tests/resize-observer/callback-cross-realm-report-exception.html is a flaky text failure.
Product: WebKit Reporter: Diego De La Toba <d_delatoba>
Component: Layout and RenderingAssignee: Diego De La Toba <d_delatoba>
Status: NEW    
Severity: Normal CC: bfulgham, kiet.ho, simon.fraser, webkit-bot-watchers-bugzilla, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   

Diego De La Toba
Reported 2026-05-26 16:45:13 PDT
imported/w3c/web-platform-tests/resize-observer/callback-cross-realm-report-exception.html is a flaky text failure on macOS release. HISTORY: https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fresize-observer%2Fcallback-cross-realm-report-exception.html DIFF: --- /Volumes/Data/worker/Apple-Tahoe-Release-AppleSilicon-WK2-Tests/build/layout-test-results/imported/w3c/web-platform-tests/resize-observer/callback-cross-realm-report-exception-expected.txt +++ /Volumes/Data/worker/Apple-Tahoe-Release-AppleSilicon-WK2-Tests/build/layout-test-results/imported/w3c/web-platform-tests/resize-observer/callback-cross-realm-report-exception-actual.txt @@ -1,4 +1,4 @@ -PASS ResizeObserver reports the exception from its callback in the callback's global object +FAIL ResizeObserver reports the exception from its callback in the callback's global object assert_array_equals: lengths differ, expected array ["frame1"] length 1, got [] length 0 DIFF URL: https://build.webkit.org/results/Apple-Tahoe-Release-AppleSilicon-WK2-Tests/313921@main%20(4194)/imported/w3c/web-platform-tests/resize-observer/callback-cross-realm-report-exception-pretty-diff.html REPRODUCTION: I was able to reproduce this on macOS with the following: run-webkit-tests --no-build --no-retry --no-show-results --exit-after-n-failures=1 --expect-pass --iterations=100 --force -f --release imported/w3c/web-platform-tests/resize-observer/callback-cross-realm-report-exception.html I am going to mark expectations as pass fail while this pends investigation.
Attachments
Radar WebKit Bug Importer
Comment 1 2026-05-26 16:45:21 PDT
Diego De La Toba
Comment 2 2026-05-26 17:05:48 PDT
Test gardening pull request: https://github.com/WebKit/WebKit/pull/65732
EWS
Comment 3 2026-05-26 17:08:52 PDT
Test gardening commit 313926@main (eabd72e8e02f): <https://commits.webkit.org/313926@main> Reviewed commits have been landed. Closing PR #65732 and removing active labels.
Diego De La Toba
Comment 4 2026-05-26 17:15:12 PDT
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