Created attachment 392286 [details] accelerated-animation-slot-invalidation-diff webanimations/accelerated-animation-slot-invalidation.html Description: This test is flaky failing on Catalina. The oldest failure that I see is on r257025, but I am not able to locate a diff for that failure. History: https://results.webkit.org/?suite=layout-tests&test=webanimations%2Faccelerated-animation-slot-invalidation.html&platform=mac&version_name=Catalina&style=debug&style=release Diff: https://build.webkit.org/results/Apple-Catalina-Debug-WK1-Tests/r257778%20(2849)/webanimations/accelerated-animation-slot-invalidation-diff.png
<rdar://problem/59999868>
<rdar://problem/60000347>
I have marked this as failing the image test while this issue is investigated. https://trac.webkit.org/changeset/257782/webkit
<rdar://problem/60000486>
I can reproduce this issue on r257778 by running the command below. run-webkit-tests --iterations 2000 --exit-after-n-failures 3 --force webanimations/accelerated-animation-slot-invalidation.html [1/2000] webanimations/accelerated-animation-slot-invalidation.html failed unexpectedly (com.apple.WebKit.Networking.Development crashed [pid=92312]) [2/2000] webanimations/accelerated-animation-slot-invalidation.html failed unexpectedly (com.apple.WebKit.Networking.Development crashed [pid=92565]) [3/2000] webanimations/accelerated-animation-slot-invalidation.html failed unexpectedly (com.apple.WebKit.Networking.Development crashed [pid=92742]) Exiting early after 3 failures. 3 tests run. 0 tests ran as expected, 3 didn't (1997 didn't run):
when using the same command, I can see that the issue starts between r257759 & r257747. r257759: [1/1000] webanimations/accelerated-animation-slot-invalidation.html failed unexpectedly (com.apple.WebKit.Networking.Development crashed [pid=39617]) [2/1000] webanimations/accelerated-animation-slot-invalidation.html failed unexpectedly (com.apple.WebKit.Networking.Development crashed [pid=39633]) [3/1000] webanimations/accelerated-animation-slot-invalidation.html failed unexpectedly (com.apple.WebKit.Networking.Development crashed [pid=39649]) Exiting early after 3 failures. 3 tests run. 0 tests ran as expected, 3 didn't (997 didn't run): r257747: All 1000 tests ran as expected.
Correction. I was not able to reproduce the failures, I could not locate a diff on the results page and did not get a crash log locally. There does appear to be an issue that's likely related to r257756.
Marking as invalid and creating a new bug, if needed