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It should be documented whether null is a valid param and if so, that the result is well defined, e.g. invalid references are considered to be not assignable. java.lang.NullPointerException at org.eclipse.xtend.core.macro.declaration.TypeReferenceImpl.isAssignableFrom(TypeReferenceImpl.java:149) at annotations.EMFVisitableProcessor$6.apply(EMFVisitable.xtend:125) at annotations.EMFVisitableProcessor$6.apply(EMFVisitable.xtend:29) at org.eclipse.xtext.xbase.lib.internal.BooleanFunctionDelegate.apply(BooleanFunctionDelegate.java:40) at com.google.common.collect.Iterators$7.computeNext(Iterators.java:645) at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:141) at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:136) at com.google.common.collect.Iterators$7.computeNext(Iterators.java:643) at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:141) at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:136) at com.google.common.collect.Sets.newLinkedHashSet(Sets.java:267) at org.eclipse.xtext.xbase.lib.IterableExtensions.toSet(IterableExtensions.java:693) at annotations.EMFVisitableProcessor.getInheritorsDeclaredIn(EMFVisitable.xtend:126) at annotations.EMFVisitableProcessor.access$2(EMFVisitable.xtend:123) at annotations.EMFVisitableProcessor$3.apply(EMFVisitable.xtend:49) at annotations.EMFVisitableProcessor$3.apply(EMFVisitable.xtend:29) at org.eclipse.xtext.xbase.lib.IterableExtensions.forEach(IterableExtensions.java:399) at annotations.EMFVisitableProcessor.doTransform(EMFVisitable.xtend:48) at org.eclipse.xtend.core.macro.AnnotationProcessor$2.run(AnnotationProcessor.java:131) at org.eclipse.xtend.core.macro.AnnotationProcessor.runWithCancelIndiciator(AnnotationProcessor.java:187) at org.eclipse.xtend.core.macro.AnnotationProcessor.inferencePhase(AnnotationProcessor.java:134) at org.eclipse.xtend.core.jvmmodel.XtendJvmModelInferrer.infer(XtendJvmModelInferrer.java:225) at org.eclipse.xtext.xbase.jvmmodel.JvmModelAssociator.installDerivedState(JvmModelAssociator.java:293) at org.eclipse.xtext.resource.DerivedStateAwareResource.installDerivedState(DerivedStateAwareResource.java:145) at org.eclipse.xtext.xbase.resource.BatchLinkableResource.getContents(BatchLinkableResource.java:124) at org.eclipse.xtend.ide.highlighting.XtendHighlightingCalculator.doProvideHighlightingFor(XtendHighlightingCalculator.java:102) at org.eclipse.xtext.xbase.ui.highlighting.XbaseHighlightingCalculator.provideHighlightingFor(XbaseHighlightingCalculator.java:98) at org.eclipse.xtext.ui.editor.syntaxcoloring.MergingHighlightedPositionAcceptor.provideHighlightingFor(MergingHighlightedPositionAcceptor.java:51) at org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingReconciler.reconcilePositions(HighlightingReconciler.java:92) at org.eclipse.xtext.ui.editor.syntaxcoloring.HighlightingReconciler.modelChanged(HighlightingReconciler.java:292) at org.eclipse.xtext.ui.editor.model.XtextDocument.notifyModelListeners(XtextDocument.java:126) at org.eclipse.xtext.ui.editor.model.XtextDocument$XtextDocumentLocker.afterModify(XtextDocument.java:180) at org.eclipse.xtext.ui.editor.model.XtextDocument$XtextDocumentLocker.afterModify(XtextDocument.java:1) at org.eclipse.xtext.util.concurrent.AbstractReadWriteAcces.modify(AbstractReadWriteAcces.java:61) at org.eclipse.xtext.ui.editor.model.XtextDocument$XtextDocumentLocker.modify(XtextDocument.java:192) at org.eclipse.xtext.ui.editor.model.XtextDocument$XtextDocumentLocker.process(XtextDocument.java:232) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler$DocumentListener.performNecessaryUpdates(XtextReconciler.java:81) at org.eclipse.xtext.ui.editor.model.XtextDocument.updateContentBeforeRead(XtextDocument.java:143) at org.eclipse.xtext.ui.editor.model.XtextDocument$XtextDocumentLocker.beforeReadOnly(XtextDocument.java:163) at org.eclipse.xtext.ui.editor.model.XtextDocument$XtextDocumentLocker.beforeReadOnly(XtextDocument.java:1) at org.eclipse.xtext.util.concurrent.AbstractReadWriteAcces.readOnly(AbstractReadWriteAcces.java:31) at org.eclipse.xtext.ui.editor.model.XtextDocument$XtextDocumentLocker.readOnly(XtextDocument.java:218) at org.eclipse.xtext.ui.editor.model.XtextDocument.readOnly(XtextDocument.java:79) at org.eclipse.xtext.ui.editor.occurrences.DefaultOccurrenceComputer.createAnnotationMap(DefaultOccurrenceComputer.java:81) at org.eclipse.xtext.ui.editor.occurrences.OccurrenceMarker$MarkOccurrenceJob.run(OccurrenceMarker.java:122) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
