[webkit-qt] QtWebkit 2.3.3 crash when document.all is compared to null in javascript

Florentin BADEA florentin_badea at yahoo.com
Mon May 19 05:50:06 PDT 2014


I am using qtwebkit 2.3.3 built from git against qt 4.8.5 (Windows 7 and Visual Studio 2008). I get a crash with the release version (works in debug) using the previewer example from Qt and loading a simple webpage like this:

    <script language="javascript" type="text/javascript">
        var isDocAllNull = document.all == null;
    Test page with document.all compared to null.

The problem does not appear in the older Qt 4.8.5.
I am able to reproduce this error in Qt 5.1.1 (also using the Previewer example).
The problem is fixed in Qt 5.2.1.

I would need a patch for qtwebkit 2.3.3 if anyone can help. Some suggestions on how to debug this (considering that the error does not occur in debug mode) would also be very helpful.

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