Bug 318645 Duplicate menu contributions after editor switching
Build Identifier: Build id: I20100630-1856 Steps to reproduce: 1. Open a Java file 2. Make sure the 'Source' menu is okay 3. Open a text file 4. Switch back to the Java file 5. Open the 'Source' menu again: all contributions are duplicated Additional switching back and forth will add even more duplicates to the 'Source' menu. Reproducible: Always
bundles/org.eclipse.e4.ui.workbench.swt/src/org/eclipse/e4/ui/workbench/swt/modeling/MenuServiceFilter.java
showRenderedMenu(event, menu, menuModel);
			break;
		case SWT.Hide:
			trace("handlerRenderedMenu.Hide", menu, menuModel);
			
			break;
		case SWT.Dispose:
			trace("handlerRenderedMenu.Dispose", menu, menuModel);
			cleanUp(menu);
			break;
		}
	}
	public void showRenderedMenu(final Event event, final Menu menu,
			final MRenderedMenu menuModel) {
		if (!(menuModel.getContributionManager() instanceof MenuManager)) {
			return;
		}
		MenuManager manager = (MenuManager) menuModel.getContributionManager();
		Method handleAboutToShow = getAboutToShow();
		try {
			handleAboutToShow.invoke(manager);
		} catch (IllegalArgumentException e) {
			
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			
			e.printStackTrace();