[Webkit-unassigned] [Bug 184011] New: Layout Test imported/mozilla/css-animations/test_animation-cancel.html is a flaky failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=184011

            Bug ID: 184011
           Summary: Layout Test
                    imported/mozilla/css-animations/test_animation-cancel.
                    html is a flaky failure
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Animations
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ryanhaddad at apple.com
                CC: dino at apple.com

The following layout test is flaky on iOS and macOS.

imported/mozilla/css-animations/test_animation-cancel.html

Probable cause:

The test has been flaky since it was imported as part of https://trac.webkit.org/changeset/229809/webkit. The test has failed at least once on release, but it is very flaky on debug bots.

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=imported%2Fmozilla%2Fcss-animations%2Ftest_animation-cancel.html

--- /Volumes/Data/slave/highsierra-debug-tests-wk1/build/layout-test-results/imported/mozilla/css-animations/test_animation-cancel-expected.txt
+++ /Volumes/Data/slave/highsierra-debug-tests-wk1/build/layout-test-results/imported/mozilla/css-animations/test_animation-cancel-actual.txt
@@ -6,6 +6,6 @@
 PASS After cancelling an animation, updating animation properties doesn't make it live again 
 PASS After cancelling an animation, updating animation-play-state doesn't make it live again 
 PASS Setting animation-name to 'none' cancels the animation 
-PASS Setting display:none on an element cancel its animations 
+FAIL Setting display:none on an element cancel its animations assert_equals: expected "idle" but got "running"
 PASS Setting display:none on an ancestor element cancels animations on descendants

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