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Bug 343393 - [Xtext grammar quickfix] NPE for "create rule" quickfix
Summary: [Xtext grammar quickfix] NPE for "create rule" quickfix
Status: CLOSED FIXED
Alias: None
Product: TMF
Classification: Modeling
Component: Xtext (show other bugs)
Version: 2.0.0   Edit
Hardware: PC Mac OS X - Carbon (unsup.)
: P3 normal (vote)
Target Milestone: M7   Edit
Assignee: Project Inbox CLA
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Reported: 2011-04-20 08:44 EDT by Sven Efftinge CLA
Modified: 2017-09-19 18:06 EDT (History)
1 user (show)

See Also:
sven.efftinge: indigo+

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Description Sven Efftinge CLA 2011-04-20 08:44:01 EDT 
In the following grammar :

grammar org.xtext.lwc.instances.Instances with org.eclipse.xtext.xbase.Xbase

generate instances "http://www.xtext.org/lwc/instances/Instances"

Instance :
	imports+=Import*
	expression+=XExpression;


I tried to use quickfix to create a rule 'Import'.
But I got the following NPE:

java.lang.NullPointerException
at org.eclipse.xtext.ui.editor.quickfix.XtextQuickAssistProcessor.computeQuickAssistProposals(XtextQuickAssistProcessor.java:100)
at org.eclipse.jface.text.quickassist.QuickAssistAssistant$ContentAssistProcessor.computeCompletionProposals(QuickAssistAssistant.java:73)
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.showPossibleCompletions(ContentAssistant.java:1660)
at org.eclipse.jface.text.quickassist.QuickAssistAssistant.showPossibleQuickAssists(QuickAssistAssistant.java:126)
at org.eclipse.jface.text.source.SourceViewer.doOperation(SourceViewer.java:926)
at org.eclipse.jface.text.source.projection.ProjectionViewer.doOperation(ProjectionViewer.java:1534)
at org.eclipse.ui.texteditor.TextOperationAction$1.run(TextOperationAction.java:131)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.texteditor.TextOperationAction.run(TextOperationAction.java:129)
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)
Comment 1 Sebastian Zarnekow CLA 2011-04-20 09:55:53 EDT 
Added some NPE guards though I could not reproduce the exception. Hope that helps ...
Comment 2 Karsten Thoms CLA 2017-09-19 17:55:28 EDT 
Closing all bugs that were set to RESOLVED before Neon.0
Comment 3 Karsten Thoms CLA 2017-09-19 18:06:16 EDT 
Closing all bugs that were set to RESOLVED before Neon.0