[Webkit-unassigned] [Bug 31681] New: [Qt] QtInstance problem

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=31681

           Summary: [Qt] QtInstance problem
           Product: WebKit
           Version: 420+
          Platform: PC
        OS/Version: Windows XP
            Status: UNCONFIRMED
          Severity: Major
          Priority: P2
         Component: WebKit Qt
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: yoann.lopes at nokia.com


Created an attachment (id=43519)
 --> (https://bugs.webkit.org/attachment.cgi?id=43519)
Bug example

A bug occurs when a new Object is made available to javascript
(addToJavascriptWindowObject) and when this new object is at the same address
in memory than a previously deleted object (which one was also made available
to javascript at some point).

In that case, a javascript exception is raised saying that you are trying to
access a deleted object, when actually the object that you are trying to access
is not deleted. (It just raises that exception because the new object occupies
a memory address that has been previously marked as deleted).

Bug spotted using Qt 4.5.1

I attach to this report a small example illustrating the bug.

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