Bug 30412 ClassCastException selecting package in java browsing perspective
Build: I20030122 I have the java browsing perspective open. I selected a package in the packages view, and there was an error trying to open the type browsing view. I can't seem to reproduce it, but hopefully the stack trace will be useful. The result was that the types view could not be initialized (the view contained an error message saying it could not be created.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/browsing/JavaBrowsingPart.java
void setSelection(ISelection selection, boolean reveal) {
		if (selection != null && selection.equals(fViewer.getSelection()))
			return;
		fProcessSelectionEvents= false;
		fViewer.setSelection(selection, reveal);
		fProcessSelectionEvents= true;
	}
	/**
	 * Tries to find the given element in a workingcopy.
	 */
	protected static IJavaElement getWorkingCopy(IJavaElement input) {
		try {
			if (input instanceof ICompilationUnit)
				return ((ICompilationUnit)input).findSharedWorkingCopy(JavaUI.getBufferFactory());
			else
				return EditorUtility.getWorkingCopy(input, false);
		} catch (JavaModelException ex) {
		}
		return null;
	}
	/**
	 * Returns the original element from which the specified working copy
	 * element was created from. This is a handle only method, the
	 * returned element may or may not exist.
	 * 
	 * @param	workingCopy the element for which to get the original
	 * @return the original Java element or <code>null</code> if this is not a working copy element
	 */
	protected static IJavaElement getOriginal(IJavaElement workingCopy) {