Bug 227237

Summary: [BigSur Wk1] imported/w3c/web-platform-tests/css/css-will-change/will-change* tests are flaky failing
Product: WebKit Reporter: Amir Mark Jr <amir_mark>
Component: New BugsAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
See Also: https://bugs.webkit.org/show_bug.cgi?id=226307
https://bugs.webkit.org/show_bug.cgi?id=225704
Attachments:
Description Flags
will-change-stacking-context-opacity-1-diff
none
will-change-stacking-context-filter-1-diff
none
will-change-fixpos-cb-filter-1-diff none

Comment 1 Radar WebKit Bug Importer 2021-06-21 14:51:06 PDT
<rdar://problem/79581733>
Comment 2 Amir Mark Jr 2021-06-21 14:54:01 PDT
Created attachment 431912 [details]
will-change-stacking-context-opacity-1-diff
Comment 3 Amir Mark Jr 2021-06-21 14:54:31 PDT
Created attachment 431913 [details]
will-change-stacking-context-filter-1-diff
Comment 4 Amir Mark Jr 2021-06-21 14:55:15 PDT
Created attachment 431914 [details]
will-change-fixpos-cb-filter-1-diff
Comment 5 Amir Mark Jr 2021-06-21 15:02:48 PDT
It appears these tests have been flaky since being introduced around r277375, not a clear regression point.
Comment 6 Amir Mark Jr 2021-06-21 17:06:07 PDT
Updated test expectations:

https://trac.webkit.org/changeset/279092/webkit
Comment 7 Ryan Haddad 2021-06-28 13:52:14 PDT
Looking at the results in https://build.webkit.org/results/Apple-BigSur-Release-WK1-Tests/r279076%20(3548)/results.html, the "actual" image is all gray or white.