Bug 44827 [Viewers] StructuredViewer's UpdateItemSafeRunnable holds onto last selected element-memory leak
I have a TableViewer that normally displays a list of objects. I clear the list by calling TableViewer.setInput(null). I found that if I initially have a list of objects, select an object, then setInput(null) the TableViewer is still holding onto an instance of the object I last selected. More specifically, it looks like StructuredViewer's UpdateItemSafeRunnable is holding onto the object. The UpdateItemSafeRunnable object should be cleared out after its use.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/StructuredViewer.java
*
 * @param listener a double-click listener
 */
public void addDoubleClickListener(IDoubleClickListener listener) {
	doubleClickListeners.add(listener);
}
/**
 * Adds a listener for selection-open in this viewer.
 * Has no effect if an identical listener is already registered.
 *
 * @param listener a double-click listener
 */
public void addOpenListener(IOpenListener listener) {
	openListeners.add(listener);
}
/* (non-Javadoc)
 * Method declared on IPostSelectionProvider.
 */
public void addPostSelectionChangedListener(ISelectionChangedListener listener) {
	postSelectionChangedListeners.add(listener);
}
/**
 * Adds support for dragging items out of this viewer via
 * a user drag-and-drop operation.
 *
 * @param operations a bitwise OR of the supported drag and drop operation
 *  types (<code>DROP_COPY</code>, <code>DROP_LINK</code>, and <code>DROP_MOVE</code>)
 * @param transferTypes the transfer types that are supported by the drag operation
 * @param listener the callback that will be invoked to set the drag
 *  data and to cleanup after the drag and drop operation finishes