Bug 327026 [Compatibility] NPE thrown when reopening an editor after moving a view into the shared area
1. Open an editor. 2. Move the 'Problems' view into the shared area. 3. Close the 'Problems' view. 4. Close the editor. 5. Reopen the same file from step 1. 6. An NPE is thrown. java.lang.NullPointerException at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.getParentWithContext(PartServiceImpl.java:224) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.internalFixContext(PartServiceImpl.java:272) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.bringToTop(PartServiceImpl.java:248) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:742) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:795) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2206) at org.eclipse.ui.internal.WorkbenchPage.access$14(WorkbenchPage.java:2173) at org.eclipse.ui.internal.WorkbenchPage$6.run(WorkbenchPage.java:2155) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2151) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2135) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2126) at org.eclipse.ui.ide.IDE.openEditor(IDE.java:651) at org.eclipse.ui.ide.IDE.openEditor(IDE.java:610) at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:354) at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:164) at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:219)
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/PartServiceImpl.java
if (oldSelected instanceof MPlaceholder) {
					oldSelected = ((MPlaceholder) oldSelected).getRef();
				}
				Object selected = event.getProperty(UIEvents.EventTags.NEW_VALUE);
				if (selected instanceof MPlaceholder) {
					selected = ((MPlaceholder) selected).getRef();
				}
				MPart oldSelectedPart = oldSelected instanceof MPart ? (MPart) oldSelected : null;
				MPart selectedPart = selected instanceof MPart ? (MPart) selected : null;
				if (oldSelectedPart != null && getParts().contains(selectedPart)) {
					firePartHidden(oldSelectedPart);
				}
				if (selectedPart != null && selectedPart.isToBeRendered()
						&& getParts().contains(selectedPart)) {
					firePartVisible(selectedPart);
					firePartBroughtToTop(selectedPart);
				}
			}
		}
	};
	private MApplication application;
	/**
	 * Might be null if this part service is created for the application
	 */
	private MWindow workbenchWindow;
	@Inject
	private IPresentationEngine engine;
	@Inject
	private EModelService modelService;
	@Inject