QT5 GUI application is crashing in release mode

[Raveendra]

I've built a QT5 GUI application using Visual studio 2012 and Qt 5.1rc SDK with help of qt-visual studio addon.
It is building fine with both release and debug mode.

When i tried to run the debug mode binary it runs fine.
But when i'm trying to run the release mode binary , its crashing .
When i tried to debug the application call stack show something similar to this .

Qt5WebKit.dll()!56e3c23()
Qt5WebKit.dll()!56c3456()
Qt5WebKit.dll()!56d34d4()
......
.....
....
.....
msvcr100.dll()!malloc(unsigned int size)Line 91*

Why I'm seeing this crash only for release mode binary ?
What would have made this crash ? How to troubleshoot this problem ?

Plz help me out

[sierdzio]

Check whether you are not going over array limits (past it's size), or trying to access a deleted object. Debug mode is a bit more relaxed about those things and can allow you to do some things that are forbidden in release.

[Raveendra]

Further investigation i found Qwebview->SetHTML() function is causing the crash in my app.
i also found the bug in the beelow link
https://bugs.webkit.org/show_bug.cgi?id=90008
is this issue is fixed ?