[Webkit-unassigned] [Bug 122600] New: [ATK] Missing checks in returnIfWebKitAccessibleIsInvalid

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=122600

           Summary: [ATK] Missing checks in
                    returnIfWebKitAccessibleIsInvalid
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Accessibility
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mario at webkit.org
                CC: cfleizach at apple.com,
                    webkit-bug-importer at group.apple.com


Besides checking if an ATK wrapper has been detached to determine whether it's invalid or not, we also need to check if the coreObject's document is null, since that might have been invalidated even before we called any function of the ATK API.

Actually, this additional check can save us from calling updateBackingStore, so bonus points

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