Bug 228528

Summary: [BigSur wk2 Debug arm64] fast/text/emoji-overlap.html is a flaky image-only failure
Product: WebKit Reporter: Eric Hutchison <ehutchison>
Component: TextAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: ap, ehutchison, mmaxfield, webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
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Description Eric Hutchison 2021-07-27 17:04:34 PDT 
Created attachment 434387 [details]
Image Diff

fast/text/emoji-overlap.html 

is a flaky image-only failure on BigSur wk2 Debug arm64.

History: https://results.webkit.org/?platform=ios&platform=mac&suite=layout-tests&test=fast%2Ftext%2Femoji-overlap.html

Diff: attached, https://build.webkit.org/results/Apple-BigSur-Debug-AppleSilicon-WK2-Tests/r280280%20(2256)/fast/text/emoji-overlap-diffs.html

Unable to reproduce on r280344 or 276875 using run-webkit-tests --debug --iterations 500 --exit-after-n-failures 1 --clobber-old-results -f fast/text/emoji-overlap.html and run-webkit-tests -f --debug --iterations 500 --exit-after-n-failures 1 --clobber-old-results -f fast/text/emoji-overlap.html. Also, unable to reproduce using a test list with run-webkit-tests --iterations 5 --debug --clobber-old-results --child processes 1 --test-list=
Comment 1 Radar WebKit Bug Importer 2021-07-27 17:05:33 PDT 
<rdar://problem/81190011>
Comment 2 Eric Hutchison 2021-07-27 17:13:03 PDT 
Updated test expectations on https://trac.webkit.org/changeset/280363/webkit
Comment 3 Myles C. Maxfield 2021-08-27 17:22:07 PDT 
Even the non-emoji text is present in the diff 🤔