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Steps to reproduce: - Create a UML model with Statemachine diagram - Create 2 states and a transition between them - The xtext editor pops up, but an exception is raised immediately An internal error occurred during: "XtextReconcilerJob". java.lang.NullPointerException at org.eclipse.xtext.util.EmfStructureComparator.internalIsSameStructure(EmfStructureComparator.java:50) at org.eclipse.xtext.util.EmfStructureComparator.isSameStructure(EmfStructureComparator.java:45) at org.eclipse.xtext.ui.editor.reconciler.XtextReconcilerDebugger.assertResouceParsedCorrectly(XtextReconcilerDebugger.java:84) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler.doRun(XtextReconciler.java:367) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler.access$2(XtextReconciler.java:350) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler$1.process(XtextReconciler.java:294) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler$1.process(XtextReconciler.java:1) at org.eclipse.xtext.util.concurrent.IUnitOfWork$Void.exec(IUnitOfWork.java:36) at org.eclipse.xtext.util.concurrent.AbstractReadWriteAcces.modify(AbstractReadWriteAcces.java:81) at org.eclipse.xtext.ui.editor.model.XtextDocument$XtextDocumentLocker.modify(XtextDocument.java:219) at org.eclipse.xtext.ui.editor.model.XtextDocument.internalModify(XtextDocument.java:103) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler.run(XtextReconciler.java:291) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53) Version: Kepler SR1, papyrus kepler nightly build. Papyrus UML (Incubation) 0.10.1.v201310220453 org.eclipse.papyrus.sdk.feature.feature.group Eclipse Modeling Project
I cannot reproduce the issue on the current nightly build. Do you have a more detailed error log?
(In reply to Camille Letavernier from comment #1) > I cannot reproduce the issue on the current nightly build. I can (kepler nightly build, that is)… > Do you have a more detailed error log? No, there's nothing else in the log file :-( Version of my xtext plugins 2.4.3v201309030823 and Guava 11.0.2v201303041515 (if that would be useful)
Same error here with version 4.3.0.5fc19. Error shown in error log is the following: eclipse.buildId=4.3.0.5fc19 java.version=1.7.0_45 java.vendor=Oracle Corporation BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=fr_FR Command-line arguments: -os linux -ws gtk -arch x86_64 Erreur Fri Dec 13 11:42:25 CET 2013 Une erreur interne s'est produite pendant : "XtextReconcilerJob". java.lang.NullPointerException at org.eclipse.xtext.util.EmfStructureComparator.internalIsSameStructure(EmfStructureComparator.java:50) at org.eclipse.xtext.util.EmfStructureComparator.isSameStructure(EmfStructureComparator.java:45) at org.eclipse.xtext.ui.editor.reconciler.XtextReconcilerDebugger.assertResouceParsedCorrectly(XtextReconcilerDebugger.java:84) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler.doRun(XtextReconciler.java:367) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler.access$2(XtextReconciler.java:350) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler$1.process(XtextReconciler.java:294) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler$1.process(XtextReconciler.java:1) at org.eclipse.xtext.util.concurrent.IUnitOfWork$Void.exec(IUnitOfWork.java:36) at org.eclipse.xtext.util.concurrent.AbstractReadWriteAcces.modify(AbstractReadWriteAcces.java:81) at org.eclipse.xtext.ui.editor.model.XtextDocument$XtextDocumentLocker.modify(XtextDocument.java:219) at org.eclipse.xtext.ui.editor.model.XtextDocument.internalModify(XtextDocument.java:103) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler.run(XtextReconciler.java:291) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
Note that the exact same error occurs when first naming a state (or renaming it using F2), when we clear the whole text in box (see error below). This makes me think the error is not linked to transition, but to empty textboxes, as the transition textbox is empty at creation, unlike states. java.lang.NullPointerException at org.eclipse.xtext.util.EmfStructureComparator.internalIsSameStructure(EmfStructureComparator.java:50) at org.eclipse.xtext.util.EmfStructureComparator.isSameStructure(EmfStructureComparator.java:45) at org.eclipse.xtext.ui.editor.reconciler.XtextReconcilerDebugger.assertResouceParsedCorrectly(XtextReconcilerDebugger.java:84) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler.doRun(XtextReconciler.java:367) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler.access$2(XtextReconciler.java:350) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler$1.process(XtextReconciler.java:294) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler$1.process(XtextReconciler.java:1) at org.eclipse.xtext.util.concurrent.IUnitOfWork$Void.exec(IUnitOfWork.java:36) at org.eclipse.xtext.util.concurrent.AbstractReadWriteAcces.modify(AbstractReadWriteAcces.java:81) at org.eclipse.xtext.ui.editor.model.XtextDocument$XtextDocumentLocker.modify(XtextDocument.java:219) at org.eclipse.xtext.ui.editor.model.XtextDocument.internalModify(XtextDocument.java:103) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler.run(XtextReconciler.java:291) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
New Gerrit change created: https://git.eclipse.org/r/129788
(In reply to Eclipse Genie from comment #5) > New Gerrit change created: https://git.eclipse.org/r/129788 Sorry, I used the wrong bug for this gerrit...
