[Webkit-unassigned] [Bug 198081] New: [Mac] Layout Test imported/w3c/web-platform-tests/html/semantics/embedded-content/media-elements/track/track-element/track-remove-track.html is a flaky failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=198081

            Bug ID: 198081
           Summary: [Mac] Layout Test
                    imported/w3c/web-platform-tests/html/semantics/embedde
                    d-content/media-elements/track/track-element/track-rem
                    ove-track.html is a flaky failure
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sroberts at apple.com

The following layout test is failing on Mac Release and Debug WK1 and WK2

imported/w3c/web-platform-tests/html/semantics/embedded-content/media-elements/track/track-element/track-remove-track.html

Probable cause:

Test appears to have been flaky for a very long time. Dashboard shows flaky failures on every queue for Debug runs and Release WK1. Release runs for WK2 are showing up recently, but local testing shows the same Harness Error (TIMEOUT) for all Mac test platforms

Reproduced with the old revision I could spade.

run-webkit-tests imported/w3c/web-platform-tests/html/semantics/embedded-content/media-elements/track/track-element/track-remove-track.html --iter 100 -f -1

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fsemantics%2Fembedded-content%2Fmedia-elements%2Ftrack%2Ftrack-element%2Ftrack-remove-track.html

Diff:

--- /Volumes/Data/slave/mojave-release-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/html/semantics/embedded-content/media-elements/track/track-element/track-remove-track-expected.txt
+++ /Volumes/Data/slave/mojave-release-tests-wk1/build/layout-test-results/imported/w3c/web-platform-tests/html/semantics/embedded-content/media-elements/track/track-element/track-remove-track-actual.txt
@@ -1,3 +1,5 @@

-PASS Tests that the 'removetrack' event is fired when an out-of-band TextTrack is removed. 
+Harness Error (TIMEOUT), message = null

+TIMEOUT Tests that the 'removetrack' event is fired when an out-of-band TextTrack is removed. Test timed out
+

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