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Bug 427924

Summary:	[Contexts] NullPointerException in WorkbenchPage.getViewStack()
Product:	[Eclipse Project] Platform	Reporter:	Paul Webster <pwebster>
Component:	UI	Assignee:	Paul Elder <pelder.eclipse>
Status:	VERIFIED FIXED	QA Contact:
Severity:	critical
Priority:	P3	CC:	daniel_megert, dreyer.ray, emoffatt, francesco.damore, kon, malaperle, marek.jagielski, pawel.1.piech, pwebster, srikanth_sankaran, stephan.herrmann, swanj, tom.kuo, Udo.Walker
Version:	4.3	Flags:	daniel_megert: pmc_approved+ pwebster: review+
Target Milestone:	4.3.2
Hardware:	PC
OS:	Linux
Whiteboard:
Bug Depends on:	398433
Bug Blocks:

Description Paul Webster

2014-02-11 11:57:17 EST

To consider the backport to 4.3.2

+++ This bug was initially created as a clone of Bug #398433 +++

BuildId: I20130108-0800

I'm getting plenty of these exceptions in my log:

java.lang.NullPointerException
	at org.eclipse.ui.internal.WorkbenchPage.getViewStack(WorkbenchPage.java:3973)
	at org.eclipse.debug.internal.ui.views.ViewContextService$ViewBinding.checkZOrder(ViewContextService.java:517)
	at org.eclipse.debug.internal.ui.views.ViewContextService$DebugContextViewBindings.doActivation(ViewContextService.java:264)
	at org.eclipse.debug.internal.ui.views.ViewContextService$DebugContextViewBindings.activateChain(ViewContextService.java:235)
	at org.eclipse.debug.internal.ui.views.ViewContextService.activateChain(ViewContextService.java:1011)
	at org.eclipse.debug.internal.ui.views.ViewContextService.contextActivated(ViewContextService.java:838)
	at org.eclipse.debug.internal.ui.views.ViewContextService.contextManagerChanged(ViewContextService.java:1085)
	at org.eclipse.core.commands.contexts.ContextManager.fireContextManagerChanged(ContextManager.java:165)
	at org.eclipse.core.commands.contexts.ContextManager.setActiveContextIds(ContextManager.java:295)
	at org.eclipse.e4.ui.internal.services.ContextContextService.getActiveContextIds(ContextContextService.java:179)
	at org.eclipse.ui.internal.contexts.ContextService.getActiveContextIds(ContextService.java:273)
	at org.eclipse.ui.internal.contexts.ActiveContextSourceProvider.getCurrentState(ActiveContextSourceProvider.java:68)
	at org.eclipse.ui.internal.contexts.ActiveContextSourceProvider.contextManagerChanged(ActiveContextSourceProvider.java:50)
	at org.eclipse.core.commands.contexts.ContextManager.fireContextManagerChanged(ContextManager.java:165)
	at org.eclipse.core.commands.contexts.ContextManager.addActiveContext(ContextManager.java:109)
	at org.eclipse.ui.internal.contexts.ContextAuthority.updateContext(ContextAuthority.java:756)
	at org.eclipse.ui.internal.contexts.ContextAuthority.activateContext(ContextAuthority.java:173)
	at org.eclipse.ui.internal.contexts.ContextService.activateContext(ContextService.java:174)
	at org.eclipse.ui.internal.contexts.ContextService.activateContext(ContextService.java:104)
	at org.eclipse.debug.internal.ui.contexts.DebugModelContextBindingManager.activateContext(DebugModelContextBindingManager.java:269)
	at org.eclipse.debug.internal.ui.contexts.DebugModelContextBindingManager.activateModel(DebugModelContextBindingManager.java:256)
	at org.eclipse.debug.internal.ui.contexts.DebugModelContextBindingManager.activated(DebugModelContextBindingManager.java:227)
	at org.eclipse.debug.internal.ui.contexts.DebugModelContextBindingManager.debugContextChanged(DebugModelContextBindingManager.java:190)
	at org.eclipse.debug.internal.ui.contexts.DebugWindowContextService$1.run(DebugWindowContextService.java:211)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.debug.internal.ui.contexts.DebugWindowContextService.notify(DebugWindowContextService.java:209)
	at org.eclipse.debug.internal.ui.contexts.DebugWindowContextService.notify(DebugWindowContextService.java:184)
	at org.eclipse.debug.internal.ui.contexts.DebugWindowContextService.debugContextChanged(DebugWindowContextService.java:407)
	at org.eclipse.debug.ui.contexts.AbstractDebugContextProvider$1.run(AbstractDebugContextProvider.java:79)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.debug.ui.contexts.AbstractDebugContextProvider.fire(AbstractDebugContextProvider.java:77)
	at org.eclipse.debug.internal.ui.views.launch.LaunchView$ContextProviderProxy.debugContextChanged(LaunchView.java:506)
	at org.eclipse.debug.ui.contexts.AbstractDebugContextProvider$1.run(AbstractDebugContextProvider.java:79)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.debug.ui.contexts.AbstractDebugContextProvider.fire(AbstractDebugContextProvider.java:77)
	at org.eclipse.debug.internal.ui.views.launch.LaunchView$TreeViewerContextProvider.activate(LaunchView.java:371)
	at org.eclipse.debug.internal.ui.views.launch.LaunchView$1.selectionChanged(LaunchView.java:468)
	at org.eclipse.jface.viewers.Viewer$2.run(Viewer.java:164)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)
	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
	at org.eclipse.jface.viewers.Viewer.fireSelectionChanged(Viewer.java:162)
	at org.eclipse.jface.viewers.StructuredViewer.updateSelection(StructuredViewer.java:2188)
	at org.eclipse.jface.viewers.StructuredViewer.setSelection(StructuredViewer.java:1725)
	at org.eclipse.jface.viewers.TreeViewer.setSelection(TreeViewer.java:1139)
	at org.eclipse.debug.internal.ui.viewers.model.InternalTreeModelViewer.trySelection(InternalTreeModelViewer.java:1047)
	at org.eclipse.debug.internal.ui.viewers.model.TreeModelContentProvider.handleSelect(TreeModelContentProvider.java:1521)
	at org.eclipse.debug.internal.ui.viewers.model.TreeModelContentProvider.updateNodes(TreeModelContentProvider.java:1173)
	at org.eclipse.debug.internal.ui.viewers.model.TreeModelContentProvider.updateNodes(TreeModelContentProvider.java:1178)
	at org.eclipse.debug.internal.ui.viewers.model.TreeModelContentProvider.updateNodes(TreeModelContentProvider.java:1178)
	at org.eclipse.debug.internal.ui.viewers.model.TreeModelContentProvider.updateNodes(TreeModelContentProvider.java:1178)
	at org.eclipse.debug.internal.ui.viewers.model.TreeModelContentProvider.updateNodes(TreeModelContentProvider.java:1178)
	at org.eclipse.debug.internal.ui.viewers.model.TreeModelContentProvider.updateModel(TreeModelContentProvider.java:437)
	at org.eclipse.debug.internal.ui.viewers.model.TreeModelContentProvider.doModelChanged(TreeModelContentProvider.java:407)
	at org.eclipse.debug.internal.ui.viewers.model.TreeModelContentProvider.access$0(TreeModelContentProvider.java:401)
	at org.eclipse.debug.internal.ui.viewers.model.TreeModelContentProvider$2.run(TreeModelContentProvider.java:389)
	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3680)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3329)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1049)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:939)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:79)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:587)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:542)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1443)


No idea what triggers it, and at first sight it doesn't seem to do harm.
OTOH, I'm also observing that the key bindings for F5-F8 at some point stop working, no idea if there could possibly be a connection between them two?

Comment 1 Paul Elder

2014-02-11 12:28:55 EST

Fix backport pushed to Gerrit as:

https://git.eclipse.org/r/21825

Comment 2 Dani Megert

2014-02-12 04:04:51 EST

Submitted with http://git.eclipse.org/c/platform/eclipse.platform.ui.git/commit/?id=1a26077d10229de80817654c07e49a298085bf75

Comment 3 Stephan Herrmann

2014-02-12 14:58:18 EST

Thanks, once more!

Comment 4 Paul Webster

2014-02-13 09:26:38 EST

In 4.3.2.M20140212-0800

PW