[Webkit-unassigned] [Bug 93903] New: Crash in RenderTableCell::borderTop() due to custom scrollbars after r124168

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=93903

           Summary: Crash in RenderTableCell::borderTop() due to custom
                    scrollbars after r124168
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tables
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jchaffraix at webkit.org
                CC: tony at chromium.org, simon.fraser at apple.com


https://trac.webkit.org/changeset/124168 changed the code scrollbar creation code to run out of styleDidChange instead of layout.

This means that we can now be potentially detached (the first time styleDidChange is called) when we create our scrollbars, which the old code didn't expect.

This is causing crashes in some renderer assuming that they are inserted in the tree when we request layout information (like RenderTableCell::borderLeft).

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