Bug 265995 - NPE in SimpleLookupTable.get()
Summary: NPE in SimpleLookupTable.get()
Status: VERIFIED DUPLICATE of bug 244762
Alias: None
Product: JDT
Classification: Eclipse Project
Component: Core (show other bugs)
Version: 3.4   Edit
Hardware: PC Linux
: P3 normal (vote)
Target Milestone: 3.5 M6   Edit
Assignee: JDT-Core-Inbox CLA
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Blocks:
 
Reported: 2009-02-24 13:40 EST by Robert Konigsberg CLA
Modified: 2009-03-11 04:40 EDT (History)
3 users (show)

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Description Robert Konigsberg CLA 2009-02-24 13:40:37 EST 
Build ID: I20080617-2000

Steps To Reproduce:
Unsure at this point in time how to reproduce this in a small test case, but it happened during an Open Type Heirarchy operation.

!ENTRY org.eclipse.jdt.ui 4 10001 2009-02-24 11:29:44.493
!MESSAGE Internal Error
!STACK 0
java.lang.reflect.InvocationTargetException
    at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:403)
    at org.eclipse.jface.window.ApplicationWindow$1.run(ApplicationWindow.java:758)
    at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
    at org.eclipse.jface.window.ApplicationWindow.run(ApplicationWindow.java:755)
    at org.eclipse.ui.internal.WorkbenchWindow.run(WorkbenchWindow.java:2483)
    at org.eclipse.jdt.internal.ui.typehierarchy.TypeHierarchyLifeCycle.ensureRefreshedTypeHierarchy(TypeHierarchyLifeCycle.java:107)
    at org.eclipse.jdt.internal.ui.typehierarchy.TypeHierarchyViewPart.updateInput(TypeHierarchyViewPart.java:525)
    at org.eclipse.jdt.internal.ui.typehierarchy.TypeHierarchyViewPart.setInputElement(TypeHierarchyViewPart.java:488)
    at org.eclipse.jdt.internal.ui.util.OpenTypeHierarchyUtil.openInViewPart(OpenTypeHierarchyUtil.java:95)
    at org.eclipse.jdt.internal.ui.util.OpenTypeHierarchyUtil.open(OpenTypeHierarchyUtil.java:72)
    at org.eclipse.jdt.ui.actions.OpenTypeHierarchyAction.run(OpenTypeHierarchyAction.java:229)
    at org.eclipse.jdt.ui.actions.OpenTypeHierarchyAction.run(OpenTypeHierarchyAction.java:179)
    at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:278)
    at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:250)
    at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
    at org.eclipse.ui.commands.ActionHandler.execute(ActionHandler.java:185)
    at org.eclipse.ui.internal.handlers.LegacyHandlerWrapper.execute(LegacyHandlerWrapper.java:109)
    at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)
    at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
    at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169)
    at org.eclipse.ui.internal.keys.WorkbenchKeyboard.executeCommand(WorkbenchKeyboard.java:471)
    at org.eclipse.ui.internal.keys.WorkbenchKeyboard.press(WorkbenchKeyboard.java:822)
    at org.eclipse.ui.internal.keys.WorkbenchKeyboard.processKeyEvent(WorkbenchKeyboard.java:880)
    at org.eclipse.ui.internal.keys.WorkbenchKeyboard.filterKeySequenceBindings(WorkbenchKeyboard.java:569)
    at org.eclipse.ui.internal.keys.WorkbenchKeyboard.access$3(WorkbenchKeyboard.java:511)
    at org.eclipse.ui.internal.keys.WorkbenchKeyboard$KeyDownFilter.handleEvent(WorkbenchKeyboard.java:126)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1436)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1157)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1182)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1167)
    at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1194)
    at org.eclipse.swt.widgets.Widget.gtk_key_press_event(Widget.java:698)
    at org.eclipse.swt.widgets.Control.gtk_key_press_event(Control.java:2761)
    at org.eclipse.swt.widgets.Composite.gtk_key_press_event(Composite.java:702)
    at org.eclipse.swt.widgets.Widget.windowProc(Widget.java:1543)
    at org.eclipse.swt.widgets.Control.windowProc(Control.java:4502)
    at org.eclipse.swt.widgets.Display.windowProc(Display.java:4099)
    at org.eclipse.swt.internal.gtk.OS._gtk_main_do_event(Native Method)
    at org.eclipse.swt.internal.gtk.OS.gtk_main_do_event(OS.java:5783)
    at org.eclipse.swt.widgets.Display.eventProc(Display.java:1177)
    at org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(Native Method)
    at org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(OS.java:1541)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3031)
    at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2382)
    at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2346)
    at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2198)
    at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:493)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:488)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)
    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:382)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1236)
Caused by: java.lang.NullPointerException
    at org.eclipse.jdt.internal.compiler.util.SimpleLookupTable.get(SimpleLookupTable.java:68)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createParameterizedType(LookupEnvironment.java:859)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.getTypeFromTypeSignature(LookupEnvironment.java:1283)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.createFields(BinaryTypeBinding.java:356)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.cachePartsFrom(BinaryTypeBinding.java:332)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createBinaryTypeFrom(LookupEnvironment.java:719)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createBinaryTypeFrom(LookupEnvironment.java:699)
    at org.eclipse.jdt.internal.core.hierarchy.HierarchyResolver.accept(HierarchyResolver.java:108)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:102)
    at org.eclipse.jdt.internal.compiler.lookup.UnresolvedReferenceBinding.resolve(UnresolvedReferenceBinding.java:49)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.resolveType(BinaryTypeBinding.java:101)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.enclosingType(BinaryTypeBinding.java:638)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.<init>(BinaryTypeBinding.java:190)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createBinaryTypeFrom(LookupEnvironment.java:702)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.cacheBinaryType(LookupEnvironment.java:172)
    at org.eclipse.jdt.internal.core.hierarchy.HierarchyResolver.resolve(HierarchyResolver.java:706)
    at org.eclipse.jdt.internal.core.hierarchy.IndexBasedHierarchyBuilder.buildForProject(IndexBasedHierarchyBuilder.java:226)
    at org.eclipse.jdt.internal.core.hierarchy.IndexBasedHierarchyBuilder.buildFromPotentialSubtypes(IndexBasedHierarchyBuilder.java:328)
    at org.eclipse.jdt.internal.core.hierarchy.IndexBasedHierarchyBuilder.build(IndexBasedHierarchyBuilder.java:131)
    at org.eclipse.jdt.internal.core.hierarchy.TypeHierarchy.compute(TypeHierarchy.java:300)
    at org.eclipse.jdt.internal.core.hierarchy.TypeHierarchy.refresh(TypeHierarchy.java:1241)
    at org.eclipse.jdt.internal.core.CreateTypeHierarchyOperation.executeOperation(CreateTypeHierarchyOperation.java:90)
    at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:709)
    at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:770)
    at org.eclipse.jdt.internal.core.BinaryType.newTypeHierarchy(BinaryType.java:863)
    at org.eclipse.jdt.internal.core.BinaryType.newTypeHierarchy(BinaryType.java:882)
    at org.eclipse.jdt.internal.core.BinaryType.newTypeHierarchy(BinaryType.java:852)
    at org.eclipse.jdt.internal.ui.typehierarchy.TypeHierarchyLifeCycle.createTypeHierarchy(TypeHierarchyLifeCycle.java:118)
    at org.eclipse.jdt.internal.ui.typehierarchy.TypeHierarchyLifeCycle.doHierarchyRefresh(TypeHierarchyLifeCycle.java:157)
    at org.eclipse.jdt.internal.ui.typehierarchy.TypeHierarchyLifeCycle$1.run(TypeHierarchyLifeCycle.java:98)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)
Root exception:
java.lang.NullPointerException
    at org.eclipse.jdt.internal.compiler.util.SimpleLookupTable.get(SimpleLookupTable.java:68)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createParameterizedType(LookupEnvironment.java:859)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.getTypeFromTypeSignature(LookupEnvironment.java:1283)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.createFields(BinaryTypeBinding.java:356)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.cachePartsFrom(BinaryTypeBinding.java:332)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createBinaryTypeFrom(LookupEnvironment.java:719)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createBinaryTypeFrom(LookupEnvironment.java:699)
    at org.eclipse.jdt.internal.core.hierarchy.HierarchyResolver.accept(HierarchyResolver.java:108)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:102)
    at org.eclipse.jdt.internal.compiler.lookup.UnresolvedReferenceBinding.resolve(UnresolvedReferenceBinding.java:49)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.resolveType(BinaryTypeBinding.java:101)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.enclosingType(BinaryTypeBinding.java:638)
    at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.<init>(BinaryTypeBinding.java:190)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createBinaryTypeFrom(LookupEnvironment.java:702)
    at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.cacheBinaryType(LookupEnvironment.java:172)
    at org.eclipse.jdt.internal.core.hierarchy.HierarchyResolver.resolve(HierarchyResolver.java:706)
    at org.eclipse.jdt.internal.core.hierarchy.IndexBasedHierarchyBuilder.buildForProject(IndexBasedHierarchyBuilder.java:226)
    at org.eclipse.jdt.internal.core.hierarchy.IndexBasedHierarchyBuilder.buildFromPotentialSubtypes(IndexBasedHierarchyBuilder.java:328)
    at org.eclipse.jdt.internal.core.hierarchy.IndexBasedHierarchyBuilder.build(IndexBasedHierarchyBuilder.java:131)
    at org.eclipse.jdt.internal.core.hierarchy.TypeHierarchy.compute(TypeHierarchy.java:300)
    at org.eclipse.jdt.internal.core.hierarchy.TypeHierarchy.refresh(TypeHierarchy.java:1241)
    at org.eclipse.jdt.internal.core.CreateTypeHierarchyOperation.executeOperation(CreateTypeHierarchyOperation.java:90)
    at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:709)
    at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:770)
    at org.eclipse.jdt.internal.core.BinaryType.newTypeHierarchy(BinaryType.java:863)
    at org.eclipse.jdt.internal.core.BinaryType.newTypeHierarchy(BinaryType.java:882)
    at org.eclipse.jdt.internal.core.BinaryType.newTypeHierarchy(BinaryType.java:852)
    at org.eclipse.jdt.internal.ui.typehierarchy.TypeHierarchyLifeCycle.createTypeHierarchy(TypeHierarchyLifeCycle.java:118)
    at org.eclipse.jdt.internal.ui.typehierarchy.TypeHierarchyLifeCycle.doHierarchyRefresh(TypeHierarchyLifeCycle.java:157)
    at org.eclipse.jdt.internal.ui.typehierarchy.TypeHierarchyLifeCycle$1.run(TypeHierarchyLifeCycle.java:98)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)



More information:

The NPE occured at this line
	int index = (key.hashCode() & 0x7FFFFFFF) % length;

which suggests that key, the parameter to the supplied method is null.

Looking up the call stack

	ParameterizedTypeBinding[] cachedInfo = (ParameterizedTypeBinding[])this.uniqueParameterizedTypeBindings.get(genericType);

means genericType is null

and it's defined here, on line 1276 of LookupEnvironment.java:

ReferenceBinding memberType = parameterizedType.genericType().getMemberType(memberName);

So you know, I am not the one reporting this bug, I'm reporting it on behalf of a colleague. How can we begin to debug this issue for you? Creating a small use case is probably not an ideal way to solve the problem.
Comment 1 Olivier Thomann CLA 2009-02-24 13:59:59 EST 
Looks like a dup of bug 244762.
Could you please try the upcoming 3.4.2 release?

*** This bug has been marked as a duplicate of bug 244762 ***
Comment 2 Jim McMaster CLA 2009-02-24 14:36:50 EST 
I am the one who originally reported this to Rob.  I was trying to "Create Type Hierarchy" on an interface.  There was a progress indicator in the status bar at the bottom of the screen.  That went to 79% (can't remember where I saw that number), then stopped making progress.  There was a busy cursor, which remained for several minutes, and eclipse was totally hung.  I could clear the hang by clicking the stop button next to the progress bar.

Eventually, the task ends with the stack trace Rob posted.  If there is any more doagnostic information I can provide, please let me know.
Comment 3 Frederic Fusier CLA 2009-03-09 14:14:40 EDT 
(In reply to comment #2)
> I am the one who originally reported this to Rob.  I was trying to "Create Type
> Hierarchy" on an interface.  There was a progress indicator in the status bar
> at the bottom of the screen.  That went to 79% (can't remember where I saw that
> number), then stopped making progress.  There was a busy cursor, which remained
> for several minutes, and eclipse was totally hung.  I could clear the hang by
> clicking the stop button next to the progress bar.
> 
> Eventually, the task ends with the stack trace Rob posted.  If there is any
> more doagnostic information I can provide, please let me know.
> 
We just wanted to know whether it was possible to verify if you can reproduce the stack trace while using 3.4.2 or not.

As said in comment 1, due to identical stack trace, there's a strong chance that your problem is a duplicate of bug 244762 which has been fixed in 3.4.2. So, you should not get this issue again while using this latest 3.4 update...
Comment 4 Frederic Fusier CLA 2009-03-11 04:40:20 EDT 
I'd rather have the confirmation from reporter but until then, as the stack traces are identical, we can consider this verified for 3.5M6...