Bug 320790 NPE in ContributionsAnalyzer
This is the I20100723-2001 build and I somehow managed to get into a state where all context menus result in this NPE! java.lang.NullPointerException at org.eclipse.e4.ui.internal.workbench.ContributionsAnalyzer.gatherMenuContributions(ContributionsAnalyzer.java:97) at org.eclipse.e4.ui.workbench.swt.modeling.MenuServiceFilter.showMenu(MenuServiceFilter.java:134) at org.eclipse.e4.ui.workbench.swt.modeling.MenuServiceFilter.handleMenu(MenuServiceFilter.java:117) at org.eclipse.e4.ui.workbench.swt.modeling.MenuServiceFilter.handleEvent(MenuServiceFilter.java:103) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1031) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:3775) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1367) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1390) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1371) at org.eclipse.swt.widgets.Menu.menuWillOpen(Menu.java:689) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5030) at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method) at org.eclipse.swt.widgets.Display.applicationNextEventMatchingMask(Display.java:4483) at org.eclipse.swt.widgets.Display.applicationProc(Display.java:4739) at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method) at org.eclipse.swt.internal.cocoa.NSApplication.nextEventMatchingMask(NSApplication.java:85) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3271)
bundles/org.eclipse.e4.ui.workbench.swt/src/org/eclipse/e4/ui/workbench/swt/modeling/MenuServiceFilter.java
if (!item.isToBeRendered() || !item.isVisible()
				|| item.getWidget() == null) {
			return;
		}
		ParameterizedCommand cmd = item.getWbCommand();
		if (cmd == null) {
			return;
		}
		final IEclipseContext lclContext = modelService
				.getContainingContext(item);
		EHandlerService service = lclContext.get(EHandlerService.class);
		item.setEnabled(service.canExecute(cmd));
	}
	private void unrender(final List<MMenuElement> menuModel) {
		trace("unrender", null, null);
		for (MMenuElement element : menuModel) {
			renderer.removeGui(element);
		}
	}
	private void removeMenuContributions(final MMenu menuModel,
			final ArrayList<MMenuElement> menuContributionsToRemove) {
		for (MMenuElement item : menuContributionsToRemove) {
			trace("removeMenuContributions " + item,
					(Widget) menuModel.getWidget(), menuModel);
			menuModel.getChildren().remove(item);
		}
	}
	private void handlerRenderedMenu(final Event event, final Menu menu,
			final MRenderedMenu menuModel) {