[Webkit-unassigned] [Bug 279588] New: [CSS anchor positioning] WebProcess crash when popover uses anchoring

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=279588

            Bug ID: 279588
           Summary: [CSS anchor positioning] WebProcess crash when popover
                    uses anchoring
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: plampe at igalia.com
                CC: david_choi5 at apple.com, koivisto at iki.fi

Created attachment 472535

  --> https://bugs.webkit.org/attachment.cgi?id=472535&action=review

small repro demo

The problem is that element.renderer() is nullptr in the Source/WebCore/style/StyleTreeResolver.cpp:1340

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