Bug 267095 – animations/animation-followed-by-transition.html is a flaky failure

• Component: Animations
• Status: NEW

[Fujii Hironori]

History:

  https://results.webkit.org/?suite=layout-tests&test=animations%2Fanimation-followed-by-transition.html

Buildbot: builder Apple-Ventura-Release-WK1-Tests build 4387 : 269160@main
https://build.webkit.org/#/builders/702/builds/4387

https://build.webkit.org/results/Apple-Ventura-Release-WK1-Tests/269160@main%20(4387)/animations/animation-followed-by-transition-diff.txt

--- /Volumes/Data/worker/Apple-Ventura-Release-WK1-Tests/build/layout-test-results/animations/animation-followed-by-transition-expected.txt
+++ /Volumes/Data/worker/Apple-Ventura-Release-WK1-Tests/build/layout-test-results/animations/animation-followed-by-transition-actual.txt
@@ -1,5 +1,4 @@
 Should see animationend followed by transitionend.
 
 animationend
-transitionend


Buildbot: builder Apple-Ventura-Release-WK2-Tests build 4461 : 271369@main
https://build.webkit.org/#/builders/708/builds/4461

[Fujii Hironori]

GTK port is marking animations/animation-followed-by-transition.html flaky, but it's not flaky these days on the buildbot.
https://github.com/WebKit/WebKit/blob/7d47c1f87098be0b3c687e5ae1aa27b0c5b54428/LayoutTests/platform/gtk/TestExpectations#L2513

[Radar WebKit Bug Importer]

<rdar://problem/120860460>

[Antoine Quint]

Seems more prevalent on WK1 but does happen with WK2.

[Antoine Quint]

First occurence I find is a test run for 269701@main. Haven't found a failure on an Apple Silicon bot.

[Antoine Quint]

I'm not able to reproduce the failure when running the test in isolation.

[Antoine Quint]

Trying to reproduce the failure with a similar test run as a failing bot failed. I'm not sure how to reproduce this as it stands.