[Webkit-unassigned] [Bug 22572] New: AccessibleBase.cpp should null-check the results of documentFrameView() calls

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=22572

           Summary: AccessibleBase.cpp should null-check the results of
                    documentFrameView() calls
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: eric at webkit.org


AccessibleBase.cpp should null-check the results of documentFrameView() calls

        Calling accLocation() when documentFrameView() could return NULL was
the
        cause of the current #1 crasher in Chromium renderer processes.
        I don't expect this crash may even be possible in Win Safari.  But
given
        that documentFrameView() clearly can return null (see implementation)
        it makes sense IMO to add these preventative checks.
        In our tree we've fixed the crash by checking mainFrame()->frameView()
        before ever calling this AX code.

It's possible this code is causing crashes for win safari like it was for
Chrome, I don't have access to any win safari crash logs to confirm or deny.


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