[Webkit-unassigned] [Bug 211258] [WinCairo][WebKit2] Flaky crash in WebCore::Layout::ContainerBox::firstChild while running some of fast/layoutformattingcontext tests

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=211258

--- Comment #2 from Fujii Hironori <Hironori.Fujii at sony.com> ---
Created attachment 398140

  --> https://bugs.webkit.org/attachment.cgi?id=398140&action=review

a screenshot of the debugger

a WeakPtr m_rootContainer of layoutState was null in Painter::paint.
Was it destructed?

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