#1000223
  • Created on
    2011-01-11 04:00
  • Reported by
    David Bernard
  • Status
    Invalid
  • Priority
    Highest (1)
  • Assigned to
    David Bernard
  • Milestone
    Backlog
  • Plan Level
    -
  • Permission type
    None
  • Due Date
    -

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NPE at scala.tools.eclipse.text.scala.ScalaCompletionProposalComputer

scala: 2.8.1

after typing ":" (auto content assist activated), the following execeptionis raised

java.lang.NullPointerException
  at scala.tools.eclipse.text.scala.ScalaCompletionProposalComputer.computeCompletionProposals(ScalaCompletionProposalComputer.scala:26)
  at org.eclipse.jdt.internal.ui.text.java.CompletionProposalComputerDescriptor.computeCompletionProposals(CompletionProposalComputerDescriptor.java:316)
  at org.eclipse.jdt.internal.ui.text.java.CompletionProposalCategory.computeCompletionProposals(CompletionProposalCategory.java:264)
  at org.eclipse.jdt.internal.ui.text.java.ContentAssistProcessor.collectProposals(ContentAssistProcessor.java:286)
  at org.eclipse.jdt.internal.ui.text.java.ContentAssistProcessor.computeCompletionProposals(ContentAssistProcessor.java:246)
  at org.eclipse.jface.text.contentassist.ContentAssistant.computeCompletionProposals(ContentAssistant.java:1834)
  at org.eclipse.jface.text.contentassist.CompletionProposalPopup.computeProposals(CompletionProposalPopup.java:556)
  at org.eclipse.jface.text.contentassist.CompletionProposalPopup.access$16(CompletionProposalPopup.java:553)
  at org.eclipse.jface.text.contentassist.CompletionProposalPopup$2.run(CompletionProposalPopup.java:488)
  at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
  at org.eclipse.jface.text.contentassist.CompletionProposalPopup.showProposals(CompletionProposalPopup.java:482)
  at org.eclipse.jface.text.contentassist.ContentAssistant$2.run(ContentAssistant.java:376)
  at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
  at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134)
  at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3515)
  at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3164)
  at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
  at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
  at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
  at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
  at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
  at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
  at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
  at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115)
  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:369)
  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:619)
  at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)
  at org.eclipse.equinox.launcher.Main.run(Main.java:1407)
  at org.eclipse.equinox.launcher.Main.main(Main.java:1383)
User picture
  on 2011-01-11 04:00 *
By David Bernard
Priority changed from Normal (3) to Highest (1)
User picture
  on 2011-02-14 10:24 *
By dleppik
I'm seeing this as well, as soon as I type a "." in the first code line of a script. I have to quit when it appears, since it piles up dozens of error alerts. I have just installed all the Scala plug-ins including Weaving, Source, and Refactoring (just to be safe; I installed and uninstalled the plugins about a year ago.)

Eclipse (Mac OS X):
Version: 3.5.2.R35x_v20100210-0800-9hEiFzmFst-TiEn9hNYgDWg1XN8ulH_JvCNGB
Build id: M20100211-1343
Scala Library for Eclipse: 2.8.1.final-p0002

Looking at the logs, the first error I get isn't reported:


!MESSAGE Failure in presentation compiler
!STACK 0
scala.tools.nsc.MissingRequirementError: object scala not found.
        at scala.tools.nsc.symtab.Definitions$definitions$.getModuleOrClass(Definitions.scala:517)
        at scala.tools.nsc.symtab.Definitions$definitions$.ScalaPackage(Definitions.scala:37)
        at scala.tools.nsc.symtab.Definitions$definitions$.ScalaPackageClass(Definitions.scala:38)
        at scala.tools.nsc.symtab.Definitions$definitions$.UnitClass(Definitions.scala:83)
        at scala.tools.nsc.symtab.Definitions$definitions$.init(Definitions.scala:789)
        at scala.tools.nsc.Global$Run.<init>(Global.scala:604)
        at scala.tools.nsc.interactive.Global$TyperRun.<init>(Global.scala:557)
        at scala.tools.eclipse.ScalaPresentationCompiler$EclipseTyperRun.<init>(ScalaPresentationCompiler.scala:123)
        at scala.tools.eclipse.ScalaPresentationCompiler.newTyperRun(ScalaPresentationCompiler.scala:167)
        at scala.tools.eclipse.ScalaPresentationCompiler.newTyperRun(ScalaPresentationCompiler.scala:25)
        at scala.tools.nsc.interactive.Global.reloadSources(Global.scala:355)
        at scala.tools.nsc.interactive.Global.typedTree(Global.scala:385)
        at scala.tools.nsc.interactive.Global$$anonfun$getTypedTree$1.apply(Global.scala:397)
        at scala.tools.nsc.interactive.Global$$anonfun$getTypedTree$1.apply(Global.scala:397)
        at scala.tools.nsc.interactive.Global$$anonfun$respond$1.apply(Global.scala:324)
        at scala.tools.nsc.interactive.Global$$anonfun$respond$1.apply(Global.scala:324)
        at scala.tools.nsc.interactive.Global.respondGradually(Global.scala:331)
        at scala.tools.nsc.interactive.Global.respond(Global.scala:324)
        at scala.tools.nsc.interactive.Global.getTypedTree(Global.scala:397)
        at scala.tools.nsc.interactive.CompilerControl$$anon$3.apply$mcV$sp(CompilerControl.scala:112)
        at scala.tools.nsc.interactive.Global.pollForWork(Global.scala:163)
        at scala.tools.nsc.interactive.Global$$anon$3.run(Global.scala:222)


Then I get some NPEs (I'm just showing one, the traces are similar):

java.lang.NullPointerException
        at scala.tools.eclipse.markoccurrences.ScalaOccurrencesFinder.findOccurrences(ScalaOccurrencesFinder.scala:18)
        at scala.tools.eclipse.ScalaSourceFileEditor.getAnnotations(ScalaSourceFileEditor.scala:111)
        at scala.tools.eclipse.ScalaSourceFileEditor.updateOccurrenceAnnotations(ScalaSourceFileEditor.scala:99)
        at scala.tools.eclipse.ScalaSourceFileEditor$$anon$1.selectionChanged(ScalaSourceFileEditor.scala:135)
        at org.eclipse.ui.internal.AbstractSelectionService.firePostSelection(AbstractSelectionService.java:179)
        at org.eclipse.ui.internal.AbstractSelectionService.setActivePart(AbstractSelectionService.java:289)
        at org.eclipse.ui.internal.WorkbenchPagePartList.fireActivePartChanged(WorkbenchPagePartList.java:60)
        at org.eclipse.ui.internal.PartList.setActivePart(PartList.java:136)
        at org.eclipse.ui.internal.WorkbenchPage.setActivePart(WorkbenchPage.java:3531)
        at org.eclipse.ui.internal.WorkbenchPage.activate(WorkbenchPage.java:614)
        at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2869)
        at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2762)
        at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2754)
        at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2705)
        at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
        at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2701)
        at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2685)
        at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2668)
        at org.eclipse.ui.ide.IDE.openEditorOnFileStore(IDE.java:1151)
        at org.eclipse.ui.internal.ide.actions.OpenLocalFileAction.run(OpenLocalFileAction.java:107)
        at org.eclipse.ui.internal.ide.actions.OpenLocalFileAction.run(OpenLocalFileAction.java:76)
        at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:251)
        at org.eclipse.ui.internal.WWinPluginAction.runWithEvent(WWinPluginAction.java:229)
        at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
        at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
        at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
        at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
        at org.eclipse.swt.widgets.Display.sendEvent(Display.java:3543)
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1250)
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1273)
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1258)
        at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1079)
        at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3441)
        at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3100)
        at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2405)
        at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)
        at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
        at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
        at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
        at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)
        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:194)
        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:368)
        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:559)
        at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
        at org.eclipse.equinox.launcher.Main.run(Main.java:1311)


Followed by:

!MESSAGE The 'org.eclipse.jdt.ui.JavaAllCompletionProposalComputer' proposal computer from the 'org.eclipse.jdt.ui' plug-in did not complete normally. The extension has thrown a runtime exception.
!STACK 0
java.lang.ArrayIndexOutOfBoundsException
        at org.eclipse.jdt.internal.ui.javaeditor.DocumentAdapter.getChar(DocumentAdapter.java:360)
        at scala.tools.eclipse.ScalaWordFinder$$anon$2.apply(ScalaWordFinder.scala:26)
        at scala.tools.eclipse.ScalaWordFinder$$anon$2.apply(ScalaWordFinder.scala:25)
        at scala.tools.eclipse.ScalaWordFinder$.findCompletionPoint(ScalaWordFinder.scala:93)
        at scala.tools.eclipse.ScalaWordFinder$.findCompletionPoint(ScalaWordFinder.scala:83)
        at scala.tools.eclipse.javaelements.ScalaCompletionEngine$$anonfun$complete$1.apply(ScalaCompletionEngine.scala:73)
        at scala.tools.eclipse.javaelements.ScalaCompletionEngine$$anonfun$complete$1.apply(ScalaCompletionEngine.scala:41)
        at scala.tools.eclipse.util.Cached$$anonfun$apply$1.apply$mcV$sp(Cached.scala:22)
        at scala.tools.eclipse.util.Cached$$anonfun$apply$1.apply(Cached.scala:21)
        at scala.tools.eclipse.util.Cached$$anonfun$apply$1.apply(Cached.scala:21)
        at scala.tools.eclipse.util.Cached$class.locked(Cached.scala:83)
        at scala.tools.eclipse.util.Cached$class.apply(Cached.scala:20)
        at scala.tools.eclipse.ScalaPresentationCompiler$CachedCompilerResult.apply(ScalaPresentationCompiler.scala:64)
        at scala.tools.eclipse.ScalaPresentationCompiler.withCompilerResult(ScalaPresentationCompiler.scala:99)
        at scala.tools.eclipse.ScalaProject$$anonfun$withCompilerResult$1.apply(ScalaProject.scala:367)
        at scala.tools.eclipse.ScalaProject$$anonfun$withCompilerResult$1.apply(ScalaProject.scala:366)
        at scala.tools.eclipse.util.Cached$$anonfun$apply$1.apply$mcV$sp(Cached.scala:22)
        at scala.tools.eclipse.util.Cached$$anonfun$apply$1.apply(Cached.scala:21)
        at scala.tools.eclipse.util.Cached$$anonfun$apply$1.apply(Cached.scala:21)
        at scala.tools.eclipse.util.Cached$class.locked(Cached.scala:83)
        at scala.tools.eclipse.util.Cached$class.apply(Cached.scala:20)
        at scala.tools.eclipse.ScalaProject$$anon$1.apply(ScalaProject.scala:40)
        at scala.tools.eclipse.ScalaProject.withPresentationCompiler(ScalaProject.scala:362)
        at scala.tools.eclipse.ScalaProject.withCompilerResult(ScalaProject.scala:366)
        at scala.tools.eclipse.javaelements.ScalaCompilationUnit$class.withCompilerResult(ScalaCompilationUnit.scala:58)
        at scala.tools.eclipse.javaelements.ScalaSourceFile.withCompilerResult(ScalaSourceFile.scala:40)
        at scala.tools.eclipse.javaelements.ScalaCompletionEngine.complete(ScalaCompletionEngine.scala:41)
        at scala.tools.eclipse.javaelements.ScalaCompilationUnit$class.codeComplete(ScalaCompilationUnit.scala:162)
        at scala.tools.eclipse.javaelements.ScalaSourceFile.codeComplete(ScalaSourceFile.scala:40)
        at org.eclipse.jdt.internal.core.CompilationUnit.codeComplete(CompilationUnit.java:357)
        at org.eclipse.jdt.internal.core.CompilationUnit.codeComplete(CompilationUnit.java:345)
        at org.eclipse.jdt.internal.ui.text.java.JavaCompletionProposalComputer.internalComputeCompletionProposals(JavaCompletionProposalComputer.java:242)
        at org.eclipse.jdt.internal.ui.text.java.JavaCompletionProposalComputer.computeCompletionProposals(JavaCompletionProposalComputer.java:204)
        at org.eclipse.jdt.internal.ui.text.java.JavaTypeCompletionProposalComputer.computeCompletionProposals(JavaTypeCompletionProposalComputer.java:58)
        at org.eclipse.jdt.internal.ui.text.java.CompletionProposalComputerDescriptor.computeCompletionProposals(CompletionProposalComputerDescriptor.java:316)
        at org.eclipse.jdt.internal.ui.text.java.CompletionProposalCategory.computeCompletionProposals(CompletionProposalCategory.java:264)
        at org.eclipse.jdt.internal.ui.text.java.ContentAssistProcessor.collectProposals(ContentAssistProcessor.java:286)
        at org.eclipse.jdt.internal.ui.text.java.ContentAssistProcessor.computeCompletionProposals(ContentAssistProcessor.java:246)
        at org.eclipse.jface.text.contentassist.ContentAssistant.computeCompletionProposals(ContentAssistant.java:1832)
        at org.eclipse.jface.text.contentassist.CompletionProposalPopup.computeProposals(CompletionProposalPopup.java:556)
        at org.eclipse.jface.text.contentassist.CompletionProposalPopup.access$16(CompletionProposalPopup.java:553)
        at org.eclipse.jface.text.contentassist.CompletionProposalPopup$2.run(CompletionProposalPopup.java:488)
        at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
        at org.eclipse.jface.text.contentassist.CompletionProposalPopup.showProposals(CompletionProposalPopup.java:482)
        at org.eclipse.jface.text.contentassist.ContentAssistant$2.run(ContentAssistant.java:376)
        at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
        at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134)
        at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3405)
        at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3102)
        at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2405)
        at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)
        at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
        at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
        at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
        at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)
        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:194)
        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:368)
        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:559)
        at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
        at org.eclipse.equinox.launcher.Main.run(Main.java:1311)


And then similar bugs repeat forever.
User picture
  on 2011-02-14 11:50 *
By David Bernard
Hi,

Your stack/log is not related with the issue.

To fix your issue, I suggest you to use the update-site of wip_exp_backport (see http://download.scala-ide.org), from your stack I suppose you use the default one/master.

/davidB
User picture
User picture
User picture
  on 2012-01-26 07:27 *
By skyluc
Status changed from Accepted to Invalid
Closing as invalid.

I don't see any problem with 2.0.0-2.8 trying when using completion on ':'. This has likely been fixed during 2.0 development.

Please reopen with additional information if you still see the problem.