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java.lang.NullPointerException at io.sarl.lang.actionprototype.DefaultActionPrototypeProvider.buildParameter(DefaultActionPrototypeProvider.java:91) at io.sarl.lang.actionprototype.DefaultActionPrototypeProvider.buildSignaturesForArgDefaultValues(DefaultActionPrototypeProvider.java:163) at io.sarl.lang.actionprototype.DefaultActionPrototypeProvider.createPrototype(DefaultActionPrototypeProvider.java:228) at io.sarl.lang.actionprototype.DefaultActionPrototypeProvider.createPrototypeFromSarlModel(DefaultActionPrototypeProvider.java:257) at io.sarl.lang.jvmmodel.SARLJvmModelInferrer.transform(SARLJvmModelInferrer.java:1247) at org.eclipse.xtend.core.jvmmodel.XtendJvmModelInferrer.transform(XtendJvmModelInferrer.java:565) at io.sarl.lang.jvmmodel.SARLJvmModelInferrer.transform(SARLJvmModelInferrer.java:1064) at io.sarl.lang.jvmmodel.SARLJvmModelInferrer.appendAOPMembers(SARLJvmModelInferrer.java:1876) at io.sarl.lang.jvmmodel.SARLJvmModelInferrer.initialize(SARLJvmModelInferrer.java:670) at io.sarl.lang.jvmmodel.SARLJvmModelInferrer$2.run(SARLJvmModelInferrer.java:400) at org.eclipse.xtend.core.jvmmodel.XtendJvmModelInferrer$3.run(XtendJvmModelInferrer.java:217) at org.eclipse.xtext.xbase.resource.BatchLinkableResource.ensureJvmMembersInitialized(BatchLinkableResource.java:231) at org.eclipse.xtext.xbase.jvmmodel.JvmModelAssociator.getOrInstall(JvmModelAssociator.java:112) at org.eclipse.xtext.xbase.jvmmodel.JvmModelAssociator.getLogicalContainerMapping(JvmModelAssociator.java:127) at org.eclipse.xtext.xbase.jvmmodel.JvmModelAssociator.getAssociatedExpression(JvmModelAssociator.java:134) at org.eclipse.xtext.xbase.typesystem.internal.LogicalContainerAwareReentrantTypeResolver.recordExpressions(LogicalContainerAwareReentrantTypeResolver.java:414) at org.eclipse.xtext.xbase.typesystem.internal.LogicalContainerAwareReentrantTypeResolver.prepare(LogicalContainerAwareReentrantTypeResolver.java:408) at org.eclipse.xtext.xbase.typesystem.internal.LogicalContainerAwareReentrantTypeResolver.computeTypes(LogicalContainerAwareReentrantTypeResolver.java:696) at org.eclipse.xtend.core.typesystem.XtendReentrantTypeResolver.computeTypes(XtendReentrantTypeResolver.java:382) at org.eclipse.xtext.xbase.typesystem.internal.DefaultReentrantTypeResolver.resolve(DefaultReentrantTypeResolver.java:163) at org.eclipse.xtext.xbase.typesystem.internal.DefaultReentrantTypeResolver.reentrantResolve(DefaultReentrantTypeResolver.java:139) at org.eclipse.xtext.xbase.typesystem.internal.CompoundReentrantTypeResolver.reentrantResolve(CompoundReentrantTypeResolver.java:79) at org.eclipse.xtext.xbase.typesystem.internal.CachingBatchTypeResolver$LazyResolvedTypes.resolveTypes(CachingBatchTypeResolver.java:80) at org.eclipse.xtext.xbase.typesystem.internal.CachingBatchTypeResolver$2.process(CachingBatchTypeResolver.java:57) at org.eclipse.xtext.xbase.typesystem.internal.CachingBatchTypeResolver$2.process(CachingBatchTypeResolver.java:1) at org.eclipse.xtext.util.concurrent.IUnitOfWork$Void.exec(IUnitOfWork.java:37) at org.eclipse.xtext.util.OnChangeEvictingCache.execWithoutCacheClear(OnChangeEvictingCache.java:129) at org.eclipse.xtext.xbase.typesystem.internal.CachingBatchTypeResolver.doResolveTypes(CachingBatchTypeResolver.java:53) at org.eclipse.xtext.xbase.typesystem.internal.AbstractBatchTypeResolver.resolveTypes(AbstractBatchTypeResolver.java:69) at org.eclipse.xtext.xbase.resource.BatchLinkingService.resolveBatched(BatchLinkingService.java:71) at org.eclipse.xtext.xbase.resource.BatchLinkableResource.resolveLazyCrossReferences(BatchLinkableResource.java:165) at org.eclipse.xtext.EcoreUtil2.resolveLazyCrossReferences(EcoreUtil2.java:498) at org.eclipse.xtext.ui.editor.reconciler.XtextDocumentReconcileStrategy.postParse(XtextDocumentReconcileStrategy.java:175) at org.eclipse.xtext.ui.editor.reconciler.XtextDocumentReconcileStrategy.doReconcile(XtextDocumentReconcileStrategy.java:153) at org.eclipse.xtext.ui.editor.reconciler.XtextDocumentReconcileStrategy.reconcile(XtextDocumentReconcileStrategy.java:67) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler.doRun(XtextReconciler.java:442) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler.access$3(XtextReconciler.java:422) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler$1.process(XtextReconciler.java:363) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler$1.process(XtextReconciler.java:1) at org.eclipse.xtext.util.concurrent.IUnitOfWork$Void.exec(IUnitOfWork.java:37) at org.eclipse.xtext.resource.OutdatedStateManager.exec(OutdatedStateManager.java:98) at org.eclipse.xtext.ui.editor.model.XtextDocument$XtextDocumentLocker.modify(XtextDocument.java:428) at org.eclipse.xtext.ui.editor.model.XtextDocument.internalModify(XtextDocument.java:162) at org.eclipse.xtext.ui.editor.reconciler.XtextReconciler.run(XtextReconciler.java:360) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)