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Bug 458525

Summary:	Eclipse shows exception while completion
Product:	[Eclipse Project] JDT	Reporter:	Mike Gostev <gostev>
Component:	Core	Assignee:	JDT-Core-Inbox <jdt-core-inbox>
Status:	CLOSED WONTFIX	QA Contact:	Jay Arthanareeswaran <jarthana>
Severity:	normal
Priority:	P3	CC:	jarthana
Version:	4.4.1
Target Milestone:	---
Hardware:	PC
OS:	Windows 7
Whiteboard:	stalebug

Description Mike Gostev

2015-01-27 09:11:54 EST

Eclipse Luna 4.4.1 with GWT plugin. JDK 1.8.0_25

Problematic line of code:
 @JoinColumn(name="parent_tag_id",foreignKey = @ForeignKey(name = "parent_tag_fk"))

I put cursor after "@ForeignKey" and press Ctrl-Space to insert correspondent import. The following exception occurs:

!ENTRY org.eclipse.jdt.ui 2 0 2015-01-27 13:52:26.678
!MESSAGE The 'org.eclipse.jdt.ui.TemplateProposalComputer' 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.ClassCastException: org.eclipse.jdt.internal.compiler.ast.MethodDeclaration cannot be cast to org.eclipse.jdt.internal.compiler.ast.TypeDeclaration
	at org.eclipse.jdt.internal.codeassist.complete.CompletionParser.consumeClassDeclaration(CompletionParser.java:2245)
	at org.eclipse.jdt.internal.compiler.parser.Parser.consumeRule(Parser.java:6169)
	at org.eclipse.jdt.internal.compiler.parser.Parser.parse(Parser.java:11035)
	at org.eclipse.jdt.internal.compiler.parser.Parser.parse(Parser.java:11283)
	at org.eclipse.jdt.internal.compiler.parser.Parser.parse(Parser.java:11240)
	at org.eclipse.jdt.internal.compiler.parser.Parser.dietParse(Parser.java:9660)
	at org.eclipse.jdt.internal.codeassist.complete.CompletionParser.dietParse(CompletionParser.java:4575)
	at org.eclipse.jdt.internal.codeassist.CompletionEngine.complete(CompletionEngine.java:1808)
	at org.eclipse.jdt.internal.core.Openable.codeComplete(Openable.java:131)
	at org.eclipse.jdt.internal.core.CompilationUnit.codeComplete(CompilationUnit.java:357)
	at org.eclipse.jdt.internal.core.CompilationUnit.codeComplete(CompilationUnit.java:351)
	at org.eclipse.jdt.internal.core.CompilationUnit.codeComplete(CompilationUnit.java:339)
	at org.eclipse.jdt.ui.text.java.JavaContentAssistInvocationContext.computeKeywordsAndContext(JavaContentAssistInvocationContext.java:298)
	at org.eclipse.jdt.ui.text.java.JavaContentAssistInvocationContext.getCoreContext(JavaContentAssistInvocationContext.java:174)
	at org.eclipse.jdt.internal.ui.text.java.TemplateCompletionProposalComputer.computeCompletionEngine(TemplateCompletionProposalComputer.java:69)
	at org.eclipse.jdt.internal.ui.text.java.AbstractTemplateCompletionProposalComputer.computeCompletionProposals(AbstractTemplateCompletionProposalComputer.java:61)
	at org.eclipse.jdt.internal.ui.text.java.CompletionProposalComputerDescriptor.computeCompletionProposals(CompletionProposalComputerDescriptor.java:333)
	at org.eclipse.jdt.internal.ui.text.java.CompletionProposalCategory.computeCompletionProposals(CompletionProposalCategory.java:337)
	at org.eclipse.jdt.internal.ui.text.java.ContentAssistProcessor.collectProposals(ContentAssistProcessor.java:325)
	at org.eclipse.jdt.internal.ui.text.java.ContentAssistProcessor.computeCompletionProposals(ContentAssistProcessor.java:282)
	at org.eclipse.jface.text.contentassist.ContentAssistant.computeCompletionProposals(ContentAssistant.java:1861)
	at org.eclipse.jface.text.contentassist.CompletionProposalPopup.computeProposals(CompletionProposalPopup.java:573)
	at org.eclipse.jface.text.contentassist.CompletionProposalPopup.access$16(CompletionProposalPopup.java:570)
	at org.eclipse.jface.text.contentassist.CompletionProposalPopup$2.run(CompletionProposalPopup.java:505)
	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
	at org.eclipse.jface.text.contentassist.CompletionProposalPopup.showProposals(CompletionProposalPopup.java:499)
	at org.eclipse.jface.text.contentassist.ContentAssistant.showPossibleCompletions(ContentAssistant.java:1687)
	at org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor$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:519)
	at org.eclipse.jface.commands.ActionHandler.execute(ActionHandler.java:122)
	at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:90)
	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:55)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:247)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:229)
	at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:132)
	at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:149)
	at org.eclipse.core.commands.Command.executeWithChecks(Command.java:499)
	at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
	at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:210)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.executeCommand(KeyBindingDispatcher.java:286)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.press(KeyBindingDispatcher.java:507)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.processKeyEvent(KeyBindingDispatcher.java:558)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.filterKeySequenceBindings(KeyBindingDispatcher.java:378)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.access$0(KeyBindingDispatcher.java:324)
	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher$KeyDownFilter.handleEvent(KeyBindingDispatcher.java:86)
	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:1060)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1085)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1070)
	at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1112)
	at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1108)
	at org.eclipse.swt.widgets.Widget.wmChar(Widget.java:1529)
	at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:4722)
	at org.eclipse.swt.widgets.Canvas.WM_CHAR(Canvas.java:343)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:4610)
	at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:339)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5023)
	at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
	at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2549)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3759)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)
	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(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:648)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1465)

Comment 1 Jay Arthanareeswaran

2015-02-04 10:34:34 EST

Reproduced on master. At the moment, we don't have a owner in the code assist area. So, it's unlikely we will get to this for Mars.

Comment 2 Jay Arthanareeswaran

2015-02-04 10:35:45 EST

(In reply to Jay Arthanareeswaran from comment #1)
> Reproduced on master. At the moment, we don't have a owner in the code
> assist area. So, it's unlikely we will get to this for Mars.

Of course, it's not nice to throw the exception, which should be addressed sooner.

Comment 3 Jay Arthanareeswaran

2015-06-30 05:12:40 EDT

I came back to this today and to my surprise, I can no longer reproduce this on master. I don't think I required to do anything special last time, but the import does appear now.

Mike, do you still see the problem on 4.5?

Comment 4 Eclipse Genie

2019-02-25 00:20:54 EST

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.