Bug 208450

Summary: [ Mac ] webanimations/accelerated-animation-renderer-change.html is flaky failing.
Product: WebKit Reporter: Jason Lawrence <Lawrence.j>
Component: AnimationsAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: dino, webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Mac   
OS: macOS 10.14   
Attachments:
Description Flags
accelerated-animation-renderer-change-diff none

Description Jason Lawrence 2020-03-02 09:27:00 PST 
Created attachment 392146 [details]
accelerated-animation-renderer-change-diff

webanimations/accelerated-animation-renderer-change.html

Description:
This test is flaky failing on Mac. The diffs appear to vary and the flaky failures are visible throughout the available history.

History:
https://results.webkit.org/?suite=layout-tests&test=webanimations%2Faccelerated-animation-renderer-change.html&limit=50000&platform=mac

Diff:
https://build.webkit.org/results/Apple-Catalina-Debug-WK1-Tests/r257654%20(2783)/webanimations/accelerated-animation-renderer-change-diff.png
Comment 1 Radar WebKit Bug Importer 2020-03-02 09:27:31 PST 
<rdar://problem/59953656>
Comment 2 Jason Lawrence 2020-03-02 09:45:30 PST 
I have marked this test as failing on images while this issue is investigated. 
https://trac.webkit.org/changeset/257717/webkit
Comment 3 Jason Lawrence 2020-03-02 09:47:44 PST 
I can reproduce this issue with r257710 by running the command below.
run-webkit-tests --iterations 2000 --exit-after-n-failures 1 --no-retry --force -f --debug -1 webanimations/accelerated-animation-renderer-change.html
[372/2000] webanimations/accelerated-animation-renderer-change.html failed unexpectedly (reference mismatch)
Exiting early after 1 failures. 369 tests run.
368 tests ran as expected, 1 didn't (1631 didn't run):