230485 2021-09-20 10:25:13 -0700 Regression (r282341?): [ iOS macOS wk2] imported/w3c/web-platform-tests/webrtc/RTCSctpTransport-events.html is a flaky failure 2021-09-20 16:43:55 -0700 1 1 1 Unclassified WebKit WebRTC WebKit Nightly Build Unspecified Unspecified NEW InRadar P2 Normal --- 1 ayumi_kojima webkit-unassigned koivisto simon.fraser webkit-bot-watchers-bugzilla webkit-bug-importer youennf oldest_to_newest 1795141 0 ayumi_kojima 2021-09-20 10:25:13 -0700 imported/w3c/web-platform-tests/webrtc/RTCSctpTransport-events.html Is flaky failing on iOS and macOS wk2. History: https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fwebrtc%2FRTCSctpTransport-events.html According to the history, it looks like the test first failed at r282059. Result page: https://build.webkit.org/results/Apple-BigSur-Release-AppleSilicon-WK2-Tests/r282745%20(4008)/results.html Diff: --- /Volumes/Data/worker/bigsur-release-applesilicon-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/webrtc/RTCSctpTransport-events-expected.txt +++ /Volumes/Data/worker/bigsur-release-applesilicon-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/webrtc/RTCSctpTransport-events-actual.txt @@ -1,4 +1,6 @@ + +Harness Error (TIMEOUT), message = null PASS SctpTransport objects are created at appropriate times -PASS SctpTransport reaches connected and closed state +TIMEOUT SctpTransport reaches connected and closed state Test timed out 1795142 1 webkit-bug-importer 2021-09-20 10:25:45 -0700 <rdar://problem/83312654> 1795145 2 ayumi_kojima 2021-09-20 10:30:49 -0700 Updated test expectations: https://trac.webkit.org/changeset/282757/webkit 1795312 3 ayumi_kojima 2021-09-20 15:25:00 -0700 I was able to reproduce the failure at TOT using run-webkit-tests --force --iterations 50 --exit-after-n-failures 1 imported/w3c/web-platform-tests/webrtc/RTCSctpTransport-events.html With older revisions (r282000-r282103) though, the test failed but with a different diff: --- /Volumes/Data/Builds/GoldenGate/test-282103/layout-test-results/imported/w3c/web-platform-tests/webrtc/RTCSctpTransport-events-expected.txt +++ /Volumes/Data/Builds/GoldenGate/test-282103/layout-test-results/imported/w3c/web-platform-tests/webrtc/RTCSctpTransport-events-actual.txt @@ -1,4 +1,6 @@ -PASS SctpTransport objects are created at appropriate times -PASS SctpTransport reaches connected and closed state +Harness Error (FAIL), message = Unhandled rejection: undefined is not an object (evaluating 'transport.state') +FAIL SctpTransport objects are created at appropriate times assert_equals: expected (undefined) undefined but got (object) null +FAIL SctpTransport reaches connected and closed state promise_test: Unhandled rejection with value: object "TypeError: undefined is not an object (evaluating 'transport.state')" + The test failed at the oldest revision available (r281695) with the same diff above. 1795348 4 ayumi_kojima 2021-09-20 16:38:40 -0700 It appears that it started at https://trac.webkit.org/changeset/282341/webkit I was able to reproduce the failure at r282341 and newer revision and the test passed at r282340: Diff: --- /Volumes/Data/worker/bigsur-release-applesilicon-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/webrtc/RTCSctpTransport-events-expected.txt +++ /Volumes/Data/worker/bigsur-release-applesilicon-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/webrtc/RTCSctpTransport-events-actual.txt @@ -1,4 +1,6 @@ + +Harness Error (TIMEOUT), message = null PASS SctpTransport objects are created at appropriate times -PASS SctpTransport reaches connected and closed state +TIMEOUT SctpTransport reaches connected and closed state Test timed out Weird thing is that r282059 failed with the same diff above on the testing machine, but I could not reproduce the same failure locally. 1795352 5 simon.fraser 2021-09-20 16:43:55 -0700 Seems unlikely that the cssom-view tests would cause an unrelated test to fail.