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Here is the complete scenario of the bug: I launch Eclipse, content assist works fine; I want to create a LineBorder in my Swing project; I type LineBorder panelBorder = new Li and hit Ctrl+Space; No popup appears and in the status bar it writes in red "No completion available"; I try Ctrl+Space on the elements where content assist worked fine 2 secs earlier, it doesn't work anymore. I try the same thing on other project, on the same project after closing and reopening it, after cleaning it and content assist works just fine before I try using LineBorder constructor, then it crashes. What I tried: Reset to defaults in 'Preferences->Java->Editor->Content Assist->Advanced'; Check every single checkbox in the same menu; Create a new workspace and try it there; Delete .index files and 'savedIndexNames.txt' in .metadata/.plugins/org.eclipse.jdt.core; Check for the duplicate libraries. The version of Eclipse is Eclipse IDE for Java Developers (Juno) 4.2.0 Here is the stack trace that appears in the logs at .metadata folder that indicates there are problems concerning org.eclipse.jdt.internal.codeassist.InternalCompletionProposal.findConstructorParameterNames: org.eclipse.e4.core.di.InjectionException: org.eclipse.core.commands.ExecutionException: While executing the action, an exception occurred at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:63) at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:231) at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:212) at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:131) at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:171) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.executeCommand(KeyBindingDispatcher.java:277) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.press(KeyBindingDispatcher.java:496) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.processKeyEvent(KeyBindingDispatcher.java:547) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.filterKeySequenceBindings(KeyBindingDispatcher.java:368) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.access$0(KeyBindingDispatcher.java:314) at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher$KeyDownFilter.handleEvent(KeyBindingDispatcher.java:83) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1262) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1052) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062) at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1104) at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1100) at org.eclipse.swt.widgets.Widget.wmChar(Widget.java:1521) at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:4640) at org.eclipse.swt.widgets.Canvas.WM_CHAR(Canvas.java:345) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4528) at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4976) at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method) at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2546) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3756) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1053) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:942) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543) 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(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) 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:1438) at org.eclipse.equinox.launcher.Main.main(Main.java:1414) Caused by: org.eclipse.core.commands.ExecutionException: While executing the action, an exception occurred at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:124) at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:76) 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.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56) ... 48 more Caused by: java.lang.ArrayIndexOutOfBoundsException: 1 at org.eclipse.jdt.internal.codeassist.InternalCompletionProposal.findConstructorParameterNames(InternalCompletionProposal.java:257) at org.eclipse.jdt.internal.codeassist.InternalCompletionProposal.findParameterNames(InternalCompletionProposal.java:1456) at org.eclipse.jdt.ui.text.java.CompletionProposalLabelProvider.appendUnboundedParameterList(CompletionProposalLabelProvider.java:113) at org.eclipse.jdt.ui.text.java.CompletionProposalLabelProvider.createMethodProposalLabel(CompletionProposalLabelProvider.java:272) at org.eclipse.jdt.ui.text.java.CompletionProposalLabelProvider.createStyledLabel(CompletionProposalLabelProvider.java:570) at org.eclipse.jdt.internal.ui.text.java.LazyJavaCompletionProposal.computeDisplayString(LazyJavaCompletionProposal.java:262) at org.eclipse.jdt.internal.ui.text.java.LazyJavaCompletionProposal.getStyledDisplayString(LazyJavaCompletionProposal.java:238) at org.eclipse.jface.text.contentassist.CompletionProposalPopup.handleSetData(CompletionProposalPopup.java:841) at org.eclipse.jface.text.contentassist.CompletionProposalPopup.access$24(CompletionProposalPopup.java:831) at org.eclipse.jface.text.contentassist.CompletionProposalPopup$3.handleEvent(CompletionProposalPopup.java:593) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062) at org.eclipse.swt.widgets.Table.checkData(Table.java:1166) at org.eclipse.swt.widgets.Table.wmNotifyChild(Table.java:6749) at org.eclipse.swt.widgets.Control.wmNotify(Control.java:5534) at org.eclipse.swt.widgets.Composite.wmNotify(Composite.java:1896) at org.eclipse.swt.widgets.Control.WM_NOTIFY(Control.java:5086) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4584) at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1627) at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2069) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4989) at org.eclipse.swt.internal.win32.OS.CallWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.CallWindowProc(OS.java:2440) at org.eclipse.swt.widgets.Table.callWindowProc(Table.java:564) at org.eclipse.swt.widgets.Table.callWindowProc(Table.java:430) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Table.windowProc(Table.java:5913) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4976) at org.eclipse.swt.internal.win32.OS.CallWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.CallWindowProc(OS.java:2440) at org.eclipse.swt.widgets.Table.callWindowProc(Table.java:564) at org.eclipse.swt.widgets.Table.callWindowProc(Table.java:430) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Table.windowProc(Table.java:5913) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4976) at org.eclipse.swt.internal.win32.OS.CallWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.CallWindowProc(OS.java:2440) at org.eclipse.swt.widgets.Table.callWindowProc(Table.java:564) at org.eclipse.swt.widgets.Table.callWindowProc(Table.java:430) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623) at org.eclipse.swt.widgets.Table.windowProc(Table.java:5913) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4976) at org.eclipse.swt.internal.win32.OS.SendMessageW(Native Method) at org.eclipse.swt.internal.win32.OS.SendMessage(OS.java:3290) at org.eclipse.swt.widgets.Table.setItemCount(Table.java:4645) at org.eclipse.jface.text.contentassist.CompletionProposalPopup.setProposals(CompletionProposalPopup.java:1127) at org.eclipse.jface.text.contentassist.CompletionProposalPopup.access$7(CompletionProposalPopup.java:1105) at org.eclipse.jface.text.contentassist.CompletionProposalPopup$2.run(CompletionProposalPopup.java:509) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.jface.text.contentassist.CompletionProposalPopup.showProposals(CompletionProposalPopup.java:492) at org.eclipse.jface.text.contentassist.ContentAssistant.showPossibleCompletions(ContentAssistant.java:1665) at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor$AdaptedSourceViewer.doOperation(CompilationUnitEditor.java:183) at org.eclipse.ui.texteditor.ContentAssistAction$1.run(ContentAssistAction.java:82) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ui.texteditor.ContentAssistAction.run(ContentAssistAction.java:80) at org.eclipse.jface.action.Action.runWithEvent(Action.java:498) at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:119) ... 54 more
Anirban, please take a look at it. We need to evaluate how serious the issue is and whether it's a regression caused by any of our recent fixes.
This bug hasn't had any activity in quite some time. Maybe the problem got resolved, was a duplicate of something else, or became less pressing for some reason - or maybe it's still relevant but just hasn't been looked at yet. If you have further information on the current state of the bug, please add it. The information can be, for example, that the problem still occurs, that you still want the feature, that more information is needed, or that the bug is (for whatever reason) no longer relevant. -- The automated Eclipse Genie.
