java.lang.RuntimeException Widget disposed too early!

課題

プラグイン開発中に直面している課題。<事象>
ランタイムEclipse終了のタイミングで掲題のエラーを吐く<原因>
不明
http://dev.eclipse.org/mhonarc/lists/pde-dev/msg01274.html

Looks like a workbench part is being disposed while it is being created.
The workbench logs an error for this. I do not know why this is happening
to you. See the code in WorkbenchPartReference:

// Add a dispose listener to the part. This dispose listener does nothing
but log an exception
// if the part's widgets get disposed unexpectedly. The workbench part
reference is the only
// object that should dispose this control, and it will remove the
listener before it does so.
getPane().getControl().addDisposeListener(prematureDisposeListener);

This is platform UI code. Perhaps you could post this question on a
newsgroup, or set a breakpoint in the dispose listener to see who is
disposing the control.