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Bug 395386

Summary:	NPE in org.eclipse.ui.internal.views.properties.tabbed.view.OverridableTabListContentProvider.init()
Product:	[Eclipse Project] Platform	Reporter:	Leopoldo (Polo) Miranda <polomm>
Component:	UI	Assignee:	Platform UI Triaged <platform-ui-triaged>
Status:	CLOSED DUPLICATE	QA Contact:
Severity:	normal
Priority:	P3	CC:	piotr.aniola, pwebster, sptaszkiewicz, zhoujunj
Version:	4.2.1	Keywords:	helpwanted
Target Milestone:	---
Hardware:	PC
OS:	Windows 7
Whiteboard:	candidate43

Description Leopoldo (Polo) Miranda

2012-11-29 12:54:59 EST

A NPE occurs in  org.eclipse.ui.internal.views.properties.tabbed.view.OverridableTabListContentProvider.init() when a web page is opened in my editor,if and only if, editor view is closed with no changes.

This is the stack trace

java.lang.NullPointerException
    at org.eclipse.ui.internal.views.properties.tabbed.view.OverridableTabListContentProvider.init(Unknown Source)
    at org.eclipse.ui.internal.views.properties.tabbed.view.OverridableTabListContentProvider.inputChanged(Unknown Source)
    at org.eclipse.jface.viewers.ContentViewer.handleDispose(Unknown Source)
    at org.eclipse.jface.viewers.StructuredViewer.handleDispose(Unknown Source)
    at org.eclipse.jface.viewers.ContentViewer$2.widgetDisposed(Unknown Source)
    at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
    at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.release(Unknown Source)
    at org.eclipse.swt.widgets.Widget.dispose(Unknown Source)
    at org.eclipse.ui.internal.views.properties.tabbed.view.TabbedPropertyComposite.dispose(Unknown Source)
    at org.eclipse.ui.part.PageBookView.removePage(Unknown Source)
    at org.eclipse.ui.part.PageBookView.partClosed(Unknown Source)
    at org.eclipse.ui.views.properties.PropertySheet.partClosed(Unknown Source)
    at org.eclipse.ui.part.PageBookView$4.partClosed(Unknown Source)
    at org.eclipse.ui.internal.WorkbenchPage$18.run(Unknown Source)
    at org.eclipse.core.runtime.SafeRunner.run(Unknown Source)
    at org.eclipse.ui.internal.WorkbenchPage.firePartClosed(Unknown Source)
    at org.eclipse.ui.internal.e4.compatibility.CompatibilityPart$1.handleEvent(Unknown Source)
    at org.eclipse.e4.ui.services.internal.events.UIEventHandler$1.run(Unknown Source)
    at org.eclipse.swt.widgets.Synchronizer.syncExec(Unknown Source)
    at org.eclipse.ui.internal.UISynchronizer.syncExec(Unknown Source)
    at org.eclipse.swt.widgets.Display.syncExec(Unknown Source)
    at org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(Unknown Source)
    at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(Unknown Source)
    at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(Unknown Source)
    at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(Unknown Source)
    at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(Unknown Source)
    at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(Unknown Source)
    at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(Unknown Source)
    at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(Unknown Source)
    at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(Unknown Source)
    at org.eclipse.equinox.internal.event.EventComponent.sendEvent(Unknown Source)
    at org.eclipse.e4.ui.services.internal.events.EventBroker.send(Unknown Source)
    at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(Unknown Source)
    at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(Unknown Source)
    at org.eclipse.e4.ui.model.application.ui.impl.UIElementImpl.setWidget(Unknown Source)
    at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.unbindWidget(Unknown Source)
    at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.disposeWidget(Unknown Source)
    at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer.disposeWidget(Unknown Source)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeRemoveGui(Unknown Source)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$3(Unknown Source)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$8.run(Unknown Source)
    at org.eclipse.core.runtime.SafeRunner.run(Unknown Source)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.removeGui(Unknown Source)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$1.handleEvent(Unknown Source)
    at org.eclipse.e4.ui.services.internal.events.UIEventHandler$1.run(Unknown Source)
    at org.eclipse.swt.widgets.Synchronizer.syncExec(Unknown Source)
    at org.eclipse.ui.internal.UISynchronizer.syncExec(Unknown Source)
    at org.eclipse.swt.widgets.Display.syncExec(Unknown Source)
    at org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(Unknown Source)
    at org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(Unknown Source)
    at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(Unknown Source)
    at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(Unknown Source)
    at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(Unknown Source)
    at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(Unknown Source)
    at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(Unknown Source)
    at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(Unknown Source)
    at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(Unknown Source)
    at org.eclipse.equinox.internal.event.EventComponent.sendEvent(Unknown Source)
    at org.eclipse.e4.ui.services.internal.events.EventBroker.send(Unknown Source)
    at org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(Unknown Source)
    at org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(Unknown Source)
    at org.eclipse.e4.ui.model.application.ui.impl.UIElementImpl.setToBeRendered(Unknown Source)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.hidePart(Unknown Source)
    at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.hidePart(Unknown Source)
    at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer.closePart(Unknown Source)
    at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer.access$9(Unknown Source)
    at org.eclipse.e4.ui.workbench.renderers.swt.StackRenderer$10.close(Unknown Source)
    at org.eclipse.swt.custom.CTabFolder.onMouse(Unknown Source)
    at org.eclipse.swt.custom.CTabFolder$1.handleEvent(Unknown Source)
    at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(Unknown Source)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Unknown Source)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(Unknown Source)
    at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(Unknown Source)
    at org.eclipse.ui.internal.Workbench$5.run(Unknown Source)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Unknown Source)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Unknown Source)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(Unknown Source)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(Unknown Source)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(Unknown Source)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(Unknown Source)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(Unknown Source)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(Unknown Source)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Unknown Source)
    at org.eclipse.equinox.launcher.Main.basicRun(Unknown Source)
    at org.eclipse.equinox.launcher.Main.run(Unknown Source)
    at org.eclipse.equinox.launcher.Main.main(Unknown Source)

Also, this problem is already reported in this forum http://www.eclipse.org/forums/index.php/m/946612/

Finally, I'm not seeing this problem on Linux platform (just windows 7).

Comment 1 Leopoldo (Polo) Miranda

2012-12-05 10:12:28 EST

Hello,

Is there a chance I get this problem fixed in Eclipse 4.2.2 ?

Thanks in advanced, Polo.

Comment 2 Paul Webster

2012-12-05 10:32:42 EST

If someone provides a solution that's not risky, then it could be considered for 4.2.2

PW

Comment 3 Leopoldo (Polo) Miranda

2012-12-19 12:05:53 EST

Hello eclipse folks,

anyone that can help on this problem ?

I'd very much appreciate your help,
Polo.

Comment 4 Paul Webster

2012-12-20 10:20:50 EST

(In reply to comment #3)
> Hello eclipse folks,
> 
> anyone that can help on this problem ?

See comment #2

PW

Comment 5 Piotr Aniola

2013-05-16 11:15:26 EDT

Hello, Leopoldo,

can you please provide me with a sample project that reproduces this issue?
This should be an easy fix.

Comment 6 Leopoldo (Polo) Miranda

2013-10-03 17:52:58 EDT

Hi Piotr,

During 2nd round or test, we're not seeing this problem any more.  Closing as invalid.

Comment 7 Leopoldo (Polo) Miranda

2013-10-03 17:53:36 EDT

See my previous comment.

Comment 8 Leopoldo (Polo) Miranda

2013-10-03 17:54:55 EDT

Comment 9 zhou jun

2014-12-01 21:28:46 EST

I have report this bug in the IBM EclipseCriticalBugList https://bugs.ottawa.ibm.com/show_bug.cgi?id=130633 

some other people also find the problem https://www.eclipse.org/forums/index.php/m/946612/

Comment 10 Wojciech Sudol

2014-12-05 05:54:42 EST

Steps to reproduce the issue:
1. Import org.eclipse.ui.examples.views.properties.tabbed.article project (http://git.eclipse.org/c/platform/eclipse.platform.ui.git/tree/examples/org.eclipse.ui.examples.views.properties.tabbed.article).
2. Open its configuration file (plugin.xml).
3. In the "Extensions" tab modify the org.eclipse.ui.views.properties.tabbed.propertyContributor extension point by setting "overridableTabListContentProvider" to "true".
4. Run Eclipse with the plugin.
5. If the "Tabbed Properties Example View" is open, close it.
6. Open "Properties" view.
7. Open any other view, and move it somewhere, so the "Properties" view is visible. This is necessary to ensure that a next view will open in a stack different than the one where "Properties" view is open.
8. Open "Tabbed Properties Example View".
9. Close the view.

This bug is most likely a symptom of bug 411704. Initial fix for bug 411704 fixes this issue as well.

Comment 11 Wojciech Sudol

2015-01-27 09:14:57 EST

After fixing bug 411704 I cannot reproduce this issue. Thus I mark this bug as a duplicate.

*** This bug has been marked as a duplicate of bug 411704 ***