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Bug 372108

Summary:	[GEF] NPE in TargetingTool.updateTargetUnderMouse
Product:	[Tools] GEF	Reporter:	Justin Dolezy <justin>
Component:	GEF-Legacy GEF (MVC)	Assignee:	Alexander Nyßen <nyssen>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	P3	CC:	nyssen
Version:	unspecified
Target Milestone:	3.8.0 (Juno)
Hardware:	All
OS:	All
Whiteboard:

Description Justin Dolezy

2012-02-21 07:23:45 EST

Build Identifier: 20110615-0604

Not sure how this gets triggered, have had several customer-submitted error reports with the following stack trace:

Caused by: java.lang.NullPointerException
	at org.eclipse.gef.tools.TargetingTool.updateTargetUnderMouse(TargetingTool.java:424)
	at org.eclipse.gef.tools.CreationTool.handleMove(CreationTool.java:249)
	at org.eclipse.gef.tools.TargetingTool.handleAutoexpose(TargetingTool.java:184)
	at org.eclipse.gef.tools.TargetingTool.doAutoexpose(TargetingTool.java:94)
	at org.eclipse.gef.tools.TargetingTool$QueuedAutoexpose.run(TargetingTool.java:319)
	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134)
	... 22 more

Looks like getCurrentViewer() is returning null.

Reproducible: Sometimes

Steps to Reproduce:
Not sure how to reproduce this, unfortunately.

Comment 1 Alexander Nyßen

2012-03-11 14:52:58 EDT

Ok, I made the implementation of updateTargetUnderMouse robust against
getCurrentViewer() returning null. Pushed changes to master. Resolving as fixed in 3.8M6