Bug 223292

Summary: [ macOS wk2 ARM64 ] fast/table/multiple-captions-crash4.html is a flakey Image failure
Product: WebKit Reporter: Robert Jenner <jenner>
Component: TextAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: ap, mmaxfield, ryanhaddad, simon.fraser, webkit-bot-watchers-bugzilla, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
See Also: https://bugs.webkit.org/show_bug.cgi?id=223206
Attachments:
Description Flags
Diff files for image failure none

Description Robert Jenner 2021-03-16 17:54:28 PDT 
fast/table/multiple-captions-crash4.html

is a flakey Image failure in macOS wk 2 in Apple Silicon only.

HISTORY URL:
https://results.webkit.org/?suite=layout-tests&test=fast%2Ftable%2Fmultiple-captions-crash4.html&architecture=arm64

Image Diff files have been attached to this bug.
Comment 1 Robert Jenner 2021-03-16 17:57:01 PDT 
Created attachment 423420 [details]
Diff files for image failure

Attaching Diff files of flakey image failure.
Comment 2 Robert Jenner 2021-03-16 18:03:03 PDT 
Updated test expectations here to Pass ImageOnlyFailure while test is being reviewed:
https://trac.webkit.org/changeset/274544/webkit
Comment 3 Robert Jenner 2021-03-16 18:03:28 PDT 
The failures are only occurring on Apple Silicon Macs, and as such I cannot reproduce them because I do not have access to one.
Comment 4 Radar WebKit Bug Importer 2021-03-16 18:06:47 PDT 
<rdar://problem/75504326>
Comment 5 Alexey Proskuryakov 2021-03-17 11:16:03 PDT 
The diff is about text antialiasing in unstyled text that just says "Passes if it doesn't crash!"

This seems like it may be a systemic issue, possibly a preceding test leaking rendering state, or a timing issue when switching between modes.

Other than that, why is a "pass if no crash" test even a reftest?