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I saw this error in the Eclipse log. During semantic highlighting another resource is loaded which is out of sync. This results in a refresh and an assertion error. I have never seen this error in earlier versions of Xtext (or EMF?) at org.eclipse.core.runtime.Assert.isLegal(Assert.java:63) at org.eclipse.core.internal.jobs.ThreadJob.illegalPush(ThreadJob.java:134) at org.eclipse.core.internal.jobs.ThreadJob.push(ThreadJob.java:333) at org.eclipse.core.internal.jobs.ImplicitJobs.begin(ImplicitJobs.java:85) at org.eclipse.core.internal.jobs.JobManager.beginRule(JobManager.java:286) at org.eclipse.core.internal.resources.WorkManager.checkIn(WorkManager.java:118) at org.eclipse.core.internal.resources.Workspace.prepareOperation(Workspace.java:2282) at org.eclipse.core.internal.resources.Resource.refreshLocal(Resource.java:1691) at org.eclipse.core.internal.resources.File.refreshLocal(File.java:333) at org.eclipse.emf.ecore.resource.impl.PlatformResourceURIHandlerImpl$WorkbenchHelper.createPlatformResourceInputStream(PlatformResourceURIHandlerImpl.java:205) at org.eclipse.emf.ecore.resource.impl.PlatformResourceURIHandlerImpl.createInputStream(PlatformResourceURIHandlerImpl.java:525) at org.eclipse.xtext.resource.ExternalContentSupport$ExternalContentAwareURIHandler.createInputStream(ExternalContentSupport.java:69) at org.eclipse.emf.ecore.resource.impl.ExtensibleURIConverterImpl.createInputStream(ExtensibleURIConverterImpl.java:360) at org.eclipse.xtext.resource.XtextResourceSet$1.createInputStream(XtextResourceSet.java:262) at org.eclipse.emf.ecore.resource.impl.ResourceImpl.load(ResourceImpl.java:1269) at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.demandLoad(ResourceSetImpl.java:259) at com.sigasi.hdt.shared.InterceptingResourceSet.demandLoadHelper(InterceptingResourceSet.java:21) at org.eclipse.xtext.resource.XtextResourceSet.getResource(XtextResourceSet.java:211) at org.eclipse.xtext.resource.SynchronizedXtextResourceSet.getResource(SynchronizedXtextResourceSet.java:24) at com.sigasi.hdt.shared.InterceptingResourceSet.getResource(InterceptingResourceSet.java:26) at org.eclipse.emf.ecore.resource.impl.ResourceSetImpl.getEObject(ResourceSetImpl.java:220) at org.eclipse.emf.ecore.util.EcoreUtil.resolve(EcoreUtil.java:199) at org.eclipse.emf.ecore.util.EcoreUtil.resolve(EcoreUtil.java:259) at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eResolveProxy(BasicEObjectImpl.java:1473) at com.sigasi.hdt.vhdl.vhdl.impl.IdentifierPathElementImpl.getIdentifier(IdentifierPathElementImpl.java:69) at com.sigasi.hdt.vhdl.vhdl.impl.IdentifierPathElementImpl.eGet(IdentifierPathElementImpl.java:108) at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:1011) at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:1003) at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eGet(BasicEObjectImpl.java:998) at com.sigasi.hdt.vhdl.ui.editor.VhdlSemanticHighlightingCalculator.a(VhdlSemanticHighlightingCalculator.java:17) at com.sigasi.hdt.vhdl.ui.editor.VhdlSemanticHighlightingCalculator.provideHighlightingFor(VhdlSemanticHighlightingCalculator.java:50) at org.eclipse.xtext.ui.editor.syntaxcoloring.MergingHighlightedPositionAcceptor.provideHighlightingFor(MergingHighlightedPositionAcceptor.java:51) at org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingReconciler.reconcilePositions(HighlightingReconciler.java:138) at org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingReconciler.modelChanged(HighlightingReconciler.java:346) at org.eclipse.xtext.ui.editor.model.XtextDocument.notifyModelListeners(XtextDocument.java:182) at org.eclipse.xtext.ui.editor.model.XtextDocument$XtextDocumentLocker.modify(XtextDocument.java:432) at org.eclipse.xtext.ui.editor.model.XtextDocument.internalModify(XtextDocument.java:131) at org.eclipse.xtext.ui.editor.DirtyStateEditorSupport$UpdateEditorStateJob.unloadAffectedResourcesAndReparseDocument(DirtyStateEditorSupport.java:179) at org.eclipse.xtext.ui.editor.DirtyStateEditorSupport$UpdateEditorStateJob.run(DirtyStateEditorSupport.java:158) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Could be caused by a new default (?) setting in Eclipse which triggers automatic refresh on access.
You don't happen to have a pattern that allows to reproduce this? Some step by step list?
(In reply to Sebastian Zarnekow from comment #2) > You don't happen to have a pattern that allows to reproduce this? Some step > by step list? This stacktrace was automatically collected at a client, we don't know how he triggered this. The 'refreshLocal' is triggered when when a file was changed outside of eclipse & eclipse itself hasn't refreshed yet. So I would assume that to trigger the bug you would have to open the file, change a dependent file outside of eclipse (without automatic refresh) & then modify the file. I don't understand why the 'refreshLocal' fails though, maybe something else happened concurrently. Either way, I really dislike the behavior of 'PlatformResourceURIHandlerImpl$WorkbenchHelper.createPlatformResourceInputStream' it shouldn't refresh the resource at all.
