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Bug 341225

Summary:	NPE when undoing link creation
Product:	[Modeling] GMF-Runtime	Reporter:	Christian Waniek <chris.waniek>
Component:	General	Assignee:	Project Inbox <gmf-runtime-inbox>
Status:	NEW ---	QA Contact:
Severity:	normal
Priority:	P3
Version:	2.3.0
Target Milestone:	---
Hardware:	PC
OS:	Windows 7
Whiteboard:

Description Christian Waniek

2011-03-29 08:47:22 EDT

I found this bug in the component diagrams of the uml2 tools (HEAD).

* Create two classes or components.
* Create an association between them
* Try to remove the association by pressing Ctrl-Z (the undo menu item is disabled)

I got the Error: Abnormal Workbench Condition
with the following Stacktrace

java.lang.NullPointerException
at org.eclipse.gmf.runtime.diagram.core.commands.SetConnectionEndsCommand.getAffectedFiles(SetConnectionEndsCommand.java:56)
at org.eclipse.gmf.runtime.common.core.command.CompositeCommand.getAffectedFiles(CompositeCommand.java:791)
at org.eclipse.gmf.runtime.common.core.command.CompositeCommand.getAffectedFiles(CompositeCommand.java:791)
at org.eclipse.gmf.runtime.common.core.internal.command.FileModificationApprover.approveFileModification(FileModificationApprover.java:88)
at org.eclipse.gmf.runtime.common.core.internal.command.FileModificationApprover.proceedUndoing(FileModificationApprover.java:73)
at org.eclipse.core.commands.operations.DefaultOperationHistory.getUndoApproval(DefaultOperationHistory.java:822)
at org.eclipse.core.commands.operations.DefaultOperationHistory.doUndo(DefaultOperationHistory.java:411)
at org.eclipse.core.commands.operations.DefaultOperationHistory.undo(DefaultOperationHistory.java:1280)
at org.eclipse.ui.operations.UndoActionHandler.runCommand(UndoActionHandler.java:78)
[..]