Bug 218456

Summary:	REGRESSION (r269245): 3 LFC tests asserting in WebCore::Layout::LayoutContext::verifyAndOutputMismatchingLayoutTree
Product:	WebKit	Reporter:	Ryan Haddad <ryanhaddad>
Component:	Layout and Rendering	Assignee:	zalan <zalan>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	bfulgham, simon.fraser, tsavell, 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=218420

Description Ryan Haddad 2020-11-02 13:12:56 PST

The following tests are consistently failing an assertion on debug macOS bots:

fast/layoutformattingcontext/table-cell-baseline-offset-simple.html
fast/layoutformattingcontext/table-cell-baseline-offset-simple2.html
fast/layoutformattingcontext/table-with-margin-content-simple.html

https://results.webkit.org/?suite=layout-tests&suite=layout-tests&suite=layout-tests&test=fast%2Flayoutformattingcontext%2Ftable-cell-baseline-offset-simple.html&test=fast%2Flayoutformattingcontext%2Ftable-cell-baseline-offset-simple2.html&test=fast%2Flayoutformattingcontext%2Ftable-with-margin-content-simple.html

https://build.webkit.org/results/Apple-Mojave-Debug-WK2-Tests/r269247%20(12863)/fast/layoutformattingcontext/table-cell-baseline-offset-simple-stderr.txt
https://build.webkit.org/results/Apple-Mojave-Debug-WK2-Tests/r269247%20(12863)/fast/layoutformattingcontext/table-cell-baseline-offset-simple2-stderr.txt
https://build.webkit.org/results/Apple-Mojave-Debug-WK2-Tests/r269247%20(12863)/fast/layoutformattingcontext/table-with-margin-content-simple-stderr.txt

Comment 1 Radar WebKit Bug Importer 2020-11-02 13:13:46 PST

<rdar://problem/70963336>

Comment 2 zalan 2020-11-02 13:28:35 PST

Looking into it.

Comment 3 zalan 2020-11-02 14:07:48 PST

https://trac.webkit.org/changeset/269274

Comment 4 Alexey Proskuryakov 2020-11-02 15:57:05 PST

*** Bug 218460 has been marked as a duplicate of this bug. ***