Fix exception with message "Widget disposed too early"

[Henrik Heimbuerger]

Task created from Mylyn.

-- Error Details --
Date: Wed Aug 27 08:25:00 CEST 2008
Message: Widget disposed too early!
Severity: Error
Plugin: org.eclipse.ui.workbench
Session Data:
eclipse.buildId=unknown
java.version=1.6.0_05
java.vendor=Sun Microsystems Inc.
BootLoader? constants: OS=win32, ARCH=x86, WS=win32, NL=en_US
Framework arguments: -application JACAVI.application
Command-line arguments: -application JACAVI.application -data F:\Projekte\JaCaVi\SVN-Sandbox\src\JACAVI/runtime-workspace-JACAVI -dev file:F:/Entwicklung/Eclipse-Workspace/.metadata/.plugins/org.eclipse.pde.core/[shared] JaCaVi (accelerated)/dev.properties -os win32 -ws win32 -arch x86

Exception Stack Trace:
java.lang.RuntimeException?: Widget disposed too early!
at org.eclipse.ui.internal.WorkbenchPartReference?$1.widgetDisposed(WorkbenchPartReference?.java:171)
at org.eclipse.swt.widgets.TypedListener?.handleEvent(TypedListener?.java:117)
at org.eclipse.swt.widgets.EventTable?.sendEvent(EventTable?.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1027)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1008)
at org.eclipse.swt.widgets.Widget.release(Widget.java:804)
at org.eclipse.swt.widgets.Composite.releaseChildren(Composite.java:755)
at org.eclipse.swt.widgets.Widget.release(Widget.java:807)
at org.eclipse.swt.widgets.Composite.releaseChildren(Composite.java:755)
at org.eclipse.swt.widgets.Widget.release(Widget.java:807)
at org.eclipse.swt.widgets.Composite.releaseChildren(Composite.java:755)
at org.eclipse.swt.widgets.Canvas.releaseChildren(Canvas.java:174)
at org.eclipse.swt.widgets.Decorations.releaseChildren(Decorations.java:771)
at org.eclipse.swt.widgets.Shell.releaseChildren(Shell.java:1211)
at org.eclipse.swt.widgets.Widget.release(Widget.java:807)
at org.eclipse.swt.widgets.Widget.dispose(Widget.java:441)
at org.eclipse.swt.widgets.Decorations.dispose(Decorations.java:446)
at org.eclipse.swt.widgets.Shell.dispose(Shell.java:674)
at org.eclipse.swt.widgets.Display.release(Display.java:3472)
at org.eclipse.swt.graphics.Device.dispose(Device.java:261)
at de.jacavi.rcp.Application.start(Application.java:31)
at org.eclipse.equinox.internal.app.EclipseAppHandle?.run(EclipseAppHandle?.java:193)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher?.runApplication(EclipseAppLauncher?.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher?.start(EclipseAppLauncher?.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter?.run(EclipseStarter?.java:382)
at org.eclipse.core.runtime.adaptor.EclipseStarter?.run(EclipseStarter?.java:179)
at sun.reflect.NativeMethodAccessorImpl?.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl?.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl?.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
at org.eclipse.equinox.launcher.Main.run(Main.java:1236)
at org.eclipse.equinox.launcher.Main.main(Main.java:1212)