Bug Info:
=========
VM crash while dragging internal frame for resize with GTK LAF in swingset2 demo.

JDK Info:
=========
java version "1.6.0-ea"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.6.0-ea-b52)
Java HotSpot(TM) Server VM (build 1.6.0-ea-b52, mixed mode)

Steps to Reproduce:
===================
1. Install 64 bit JDK bundle.

2. Use the following command and launch the application
${JAVA_HOME}/bin/java -jar ${JAVA_HOME}/demo/jfc/SwingSet2Demo/*.jar

3. Select either GTK LookAndFeel.

4. Click on minimize button on any one internal frame and then restore.

5. Drag the restore frame for resize the window.

Expected Result:
=================
The internal frame should resize.

Actual Result:
==============
VM crashes and application has been closed.

Please check the attached error log file.