Community
Participate
Working Groups
The following incident was reported via the automated error reporting: code: 0 plugin: org.eclipse.ui_3.107.0.v20150507-1945 message: Unhandled event loop exception fingerprint: 0255b882 exception class: java.lang.NullPointerException exception message: - number of children: 0 java.lang.NullPointerException: null at sun.reflect.UnsafeFieldAccessorImpl.ensureObj(UnsafeFieldAccessorImpl.java:57) at sun.reflect.UnsafeObjectFieldAccessorImpl.get(UnsafeObjectFieldAccessorImpl.java:36) at java.lang.reflect.Field.get(Field.java:393) at org.eclipse.recommenders.completion.rcp.processable.ProcessableJavaMethodCompletionProposal.createRequiredTypeCompletionProposal(ProcessableJavaMethodCompletionProposal.java:72) at org.eclipse.jdt.internal.ui.text.java.AbstractJavaCompletionProposal.apply(AbstractJavaCompletionProposal.java:340) at org.eclipse.jdt.internal.ui.text.java.JavaMethodCompletionProposal.apply(JavaMethodCompletionProposal.java:58) at org.eclipse.jdt.internal.ui.text.java.AbstractJavaCompletionProposal.apply(AbstractJavaCompletionProposal.java:504) at org.eclipse.jdt.internal.ui.text.java.LazyJavaCompletionProposal.apply(LazyJavaCompletionProposal.java:489) at org.eclipse.jface.text.contentassist.CompletionProposalPopup.insertProposal(CompletionProposalPopup.java:963) at org.eclipse.jface.text.contentassist.CompletionProposalPopup.insertSelectedProposalWithMask(CompletionProposalPopup.java:914) at org.eclipse.jface.text.contentassist.CompletionProposalPopup.verifyKey(CompletionProposalPopup.java:1358) at org.eclipse.jface.text.contentassist.ContentAssistant$InternalListener.verifyKey(ContentAssistant.java:814) at org.eclipse.jface.text.TextViewer$VerifyKeyListenersManager.verifyKey(TextViewer.java:493) at org.eclipse.swt.custom.StyledTextListener.handleEvent(StyledTextListener.java:66) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4362) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1113) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1137) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1122) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:788) at org.eclipse.swt.custom.StyledText.handleKeyDown(StyledText.java:5990) at org.eclipse.swt.custom.StyledText$7.handleEvent(StyledText.java:5682) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4362) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1113) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1137) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1122) at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1164) at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1160) at org.eclipse.swt.widgets.Widget.wmChar(Widget.java:1581) at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:4781) at org.eclipse.swt.widgets.Canvas.WM_CHAR(Canvas.java:343) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4662) at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:339) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5050) at org.eclipse.swt.internal.win32.OS.DispatchMessageW(OS.java:-2) at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2549) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3767) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:654) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:598) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:139) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235) at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-2) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608) at org.eclipse.equinox.launcher.Main.run(Main.java:1515) at org.eclipse.equinox.launcher.Main.main(Main.java:1488) General Information: reported-by: anonymous-id: 05d5c818-330e-4d59-a550-a03894146d66 eclipse-build-id: 4.5.0.I20150603-2000 eclipse-product: org.eclipse.epp.package.java.product operating system: Windows7 6.1.0 (x86_64) - win32 jre-version: 1.8.0_45-b15 The following plug-ins were present on the execution stack (*): 1. org.eclipse.core.databinding.observable_1.5.0.v20150422-0725 2. org.eclipse.core.databinding_1.5.0.v20150422-0725 3. org.eclipse.core.runtime_3.11.0.v20150405-1723 4. org.eclipse.e4.ui.workbench_1.3.0.v20150531-1948 5. org.eclipse.e4.ui.workbench.swt_0.13.0.v20150504-0621 6. org.eclipse.equinox.app_1.3.300.v20150423-1356 7. org.eclipse.equinox.launcher_1.3.100.v20150511-1540 8. org.eclipse.jdt.ui_3.11.0.v20150527-0925 9. org.eclipse.jdt_3.11.0.v20150603-2000 10. org.eclipse.jface.text_3.10.0.v20150603-1752 11. org.eclipse.jface_3.11.0.v20150602-1400 12. org.eclipse.recommenders.completion.rcp_2.2.0.v20150609-1848 13. org.eclipse.swt_3.104.0.v20150528-0211 14. org.eclipse.ui_3.107.0.v20150507-1945 15. org.eclipse.ui.ide.application_1.1.0.v20150422-0725 16. org.eclipse.ui.ide_3.11.0.v20150510-1749 Please note that: * Messages, stacktraces, and nested status objects may be shortened. * Bug fields like status, resolution, and whiteboard are sent back to reporters. * The list of present bundles and their respective versions was calculated by package naming heuristics. This may or may not reflect reality. Other Resources: * Report: https://dev.eclipse.org/recommenders/committers/confess/#/problems/55ae36c5e4b0577cce8f4b90 * Manual: https://dev.eclipse.org/recommenders/community/confess/#/guide Thank you for your assistance. Your friendly error-reports-inbox. This bug was created on behalf of andreas.sewe@codetrails.com.
Looking at the code CompletionProposalCollector collector = (CompletionProposalCollector) JAVA_CONTENT_ASSIST_INVOCATION_CONTEXT_F_COLLECTOR.get(invocationContext); CompletionContext newCoreContext = (CompletionContext) COMPLETION_PROPOSAL_COLLECTOR_F_CONTEXT.get(collector); // line 72 it seems that collector is null. COMPLETION_PROPOSAL_COLLECTOR_F_CONTEXT cannot be null at this point, due to an earlier check. I wonder how this happens, as I haven't encountered this during any of my tests. It would be great if the original reporter could share with us how his or her Java > Editor > Content Assist > Advanced preferences look like (an attached screenshot would be fine).
Created attachment 270133 [details] Screenshot of content assist page, as requested.
(In reply to Gordan Krešić from comment #2) > Created attachment 270133 [details] > Screenshot of content assist page, as requested. Thanks. That is helpful. Do you know by any chance which plug-in contributes the icon-less "Basic Proposals" entry? This is the only entry that I don't have here myself and my be what causes things to de-rail. Also, could you please provide me with a list of installed features (About Eclipse > Installation Details > Configuration)? If you don't know what Basic Proposals is, I could try to track it down. But a reproducible scenario, i.e., a short piece of code where you trigger content assist and the NPE happens would be must helpful.
I tried to make a repro case, but couldn't. I noticed that upon Eclipse startup, everything works fine. It crashes later at some point, but couldn't pinpoint exactly when. What I did notice however is that it crashes when I ask for constructor proposals, e.g.: List<Foo> a; a = ArrayList<>(); If I place cursor between "ArrayList" and "<>" and ask for proposals, I either get this error or don't get proposals for class "ArrayList". If it provides any clue, after initial Eclipse honeymoon (when everything works) has passed, I don't even get proposals just for type (java.util.ArrayList), but just for constructors (java.util.ArrayList()) which doesn't work (choosing that proposal does nothing, just inserts newline in source). I'm not sure about "Basic proposals", but if I turn that off, I don't get contructors proposals (and maybe something else). I'm attaching configuration details.
Created attachment 271361 [details] Eclipse configuration details, as requested.
