Got java.lang.IllegalArgumentException with plugin running in MPS

[fcampagne]

java.lang.IllegalArgumentException: Argument for @NotNull parameter 'description' of com/intellij/psi/impl/source/tree/Factory.createErrorElement must not be null at com.intellij.psi.impl.source.tree.Factory.$$$reportNull$$$0(Factory.java) at com.intellij.psi.impl.source.tree.Factory.createErrorElement(Factory.java) at com.intellij.lang.impl.PsiBuilderImpl.createComposite(PsiBuilderImpl.java:1274) at com.intellij.lang.impl.PsiBuilderImpl.bind(PsiBuilderImpl.java:1203) at com.intellij.lang.impl.PsiBuilderImpl.buildTree(PsiBuilderImpl.java:919) at com.intellij.lang.impl.PsiBuilderImpl.getTreeBuilt(PsiBuilderImpl.java:905) at lv.kid.vermut.intellij.yaml.parser.YamlPsiParser.parse(YamlPsiParser.java:50) at com.intellij.psi.tree.ILazyParseableElementType.doParseContents(ILazyParseableElementType.java:75) at com.intellij.psi.tree.IFileElementType.parseContents(IFileElementType.java:53) at com.intellij.psi.impl.source.tree.LazyParseableElement.lambda$ensureParsed$0(LazyParseableElement.java:206) at com.intellij.psi.impl.DebugUtil.performPsiModification(DebugUtil.java:553) at com.intellij.psi.impl.source.tree.LazyParseableElement.ensureParsed(LazyParseableElement.java:205) at com.intellij.psi.impl.source.tree.LazyParseableElement.getFirstChildNode(LazyParseableElement.java:254) at com.intellij.psi.impl.source.tree.LazyParseableElement.getFirstChildNode(LazyParseableElement.java:42) at com.intellij.psi.impl.source.tree.SharedImplUtil.getFirstChild(SharedImplUtil.java:51) at com.intellij.psi.impl.source.PsiFileImpl.getFirstChild(PsiFileImpl.java:725) at com.intellij.psi.PsiWalkingState$PsiTreeGuide.getFirstChild(PsiWalkingState.java:49) at com.intellij.psi.PsiWalkingState$PsiTreeGuide.getFirstChild(PsiWalkingState.java:31) at com.intellij.util.WalkingState.next(WalkingState.java:73) at com.intellij.util.WalkingState.walkChildren(WalkingState.java:61) at com.intellij.util.WalkingState.elementStarted(WalkingState.java:52) at com.intellij.psi.PsiWalkingState.elementStarted(PsiWalkingState.java:79) at com.intellij.psi.PsiRecursiveElementWalkingVisitor.visitElement(PsiRecursiveElementWalkingVisitor.java:48) at com.intellij.psi.util.PsiTreeUtil$4.visitElement(PsiTreeUtil.java:877) at com.intellij.psi.PsiElementVisitor.visitFile(PsiElementVisitor.java:34) at com.intellij.psi.PsiRecursiveElementWalkingVisitor.visitFile(PsiRecursiveElementWalkingVisitor.java:70) at com.intellij.extapi.psi.PsiFileBase.accept(PsiFileBase.java:70) at com.intellij.psi.util.PsiTreeUtil.processElements(PsiTreeUtil.java:872) at com.intellij.psi.util.PsiTreeUtil.findChildrenOfAnyType(PsiTreeUtil.java:333) at com.intellij.psi.util.PsiTreeUtil.findChildrenOfType(PsiTreeUtil.java:296) at lv.kid.vermut.intellij.yaml.editor.YamlFoldingBuilder.buildFoldRegions(YamlFoldingBuilder.java:31) at com.intellij.lang.folding.LanguageFolding.buildFoldingDescriptors(LanguageFolding.java:82) at com.intellij.codeInsight.folding.impl.FoldingUpdate.getFoldingsFor(FoldingUpdate.java:246) at com.intellij.codeInsight.folding.impl.FoldingUpdate.getFoldingsFor(FoldingUpdate.java:226) at com.intellij.codeInsight.folding.impl.CodeFoldingManagerImpl.buildInitialFoldings(CodeFoldingManagerImpl.java:192) at com.intellij.openapi.fileEditor.impl.text.PsiAwareTextEditorImpl.loadEditorInBackground(PsiAwareTextEditorImpl.java:50) at com.intellij.openapi.fileEditor.impl.text.AsyncEditorLoader.lambda$tryLoadEditor$4(AsyncEditorLoader.java:163) at com.intellij.psi.impl.PsiDocumentManagerBase.lambda$commitAndRunReadAction$4(PsiDocumentManagerBase.java:507) at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:974) at com.intellij.openapi.application.ReadAction.compute(ReadAction.java:57) at com.intellij.psi.impl.PsiDocumentManagerBase.commitAndRunReadAction(PsiDocumentManagerBase.java:505) at com.intellij.openapi.fileEditor.impl.text.AsyncEditorLoader.lambda$tryLoadEditor$5(AsyncEditorLoader.java:166) at com.intellij.openapi.progress.util.ProgressIndicatorUtils.lambda$runWithWriteActionPriority$1(ProgressIndicatorUtils.java:121) at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:164) at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:586) at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:532) at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:86) at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:151) at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runWithWriteActionPriority(ProgressIndicatorUtils.java:110) at com.intellij.openapi.fileEditor.impl.text.AsyncEditorLoader.tryLoadEditor(AsyncEditorLoader.java:165) at com.intellij.openapi.fileEditor.impl.text.AsyncEditorLoader.lambda$scheduleLoading$2(AsyncEditorLoader.java:122) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at com.intellij.util.concurrency.BoundedTaskExecutor.doRun(BoundedTaskExecutor.java:220) at com.intellij.util.concurrency.BoundedTaskExecutor.access$100(BoundedTaskExecutor.java:26) at com.intellij.util.concurrency.BoundedTaskExecutor$2.lambda$run$0(BoundedTaskExecutor.java:198) at com.intellij.util.ConcurrencyUtil.runUnderThreadName(ConcurrencyUtil.java:224) at com.intellij.util.concurrency.BoundedTaskExecutor$2.run(BoundedTaskExecutor.java:194) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)

[tom--]

java.lang.IllegalArgumentException: Argument for @NotNull parameter 'description' of com/intellij/psi/impl/source/tree/Factory.createErrorElement must not be null at com.intellij.psi.impl.source.tree.Factory.$$$reportNull$$$0(Factory.java) at com.intellij.psi.impl.source.tree.Factory.createErrorElement(Factory.java) at com.intellij.lang.impl.PsiBuilderImpl.createComposite(PsiBuilderImpl.java:1303) at com.intellij.lang.impl.PsiBuilderImpl.bind(PsiBuilderImpl.java:1232) at com.intellij.lang.impl.PsiBuilderImpl.buildTree(PsiBuilderImpl.java:938) at com.intellij.lang.impl.PsiBuilderImpl.getTreeBuilt(PsiBuilderImpl.java:924) at lv.kid.vermut.intellij.yaml.parser.YamlPsiParser.parse(YamlPsiParser.java:50) at com.intellij.psi.tree.ILazyParseableElementType.doParseContents(ILazyParseableElementType.java:75) at com.intellij.psi.tree.IFileElementType.parseContents(IFileElementType.java:53) at com.intellij.psi.impl.source.tree.LazyParseableElement.lambda$ensureParsed$0(LazyParseableElement.java:198) at com.intellij.psi.impl.DebugUtil.performPsiModification(DebugUtil.java:564) at com.intellij.psi.impl.source.tree.LazyParseableElement.ensureParsed(LazyParseableElement.java:197) at com.intellij.psi.impl.source.tree.LazyParseableElement.getFirstChildNode(LazyParseableElement.java:246) at com.intellij.psi.impl.source.tree.LazyParseableElement.getFirstChildNode(LazyParseableElement.java:40) at com.intellij.psi.impl.source.tree.SharedImplUtil.getFirstChild(SharedImplUtil.java:51) at com.intellij.psi.impl.source.PsiFileImpl.getFirstChild(PsiFileImpl.java:723) at com.intellij.codeInsight.daemon.impl.Divider.divideInsideAndOutsideInOneRoot(Divider.java:121) at com.intellij.codeInsight.daemon.impl.Divider.divideInsideAndOutsideInOneRoot(Divider.java:71) at com.intellij.codeInsight.daemon.impl.Divider.divideInsideAndOutsideAllRoots(Divider.java:58) at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.collectInformationWithProgress(GeneralHighlightingPass.java:179) at com.intellij.codeInsight.daemon.impl.ProgressableTextEditorHighlightingPass.doCollectInformation(ProgressableTextEditorHighlightingPass.java:84) at com.intellij.codeHighlighting.TextEditorHighlightingPass.collectInformation(TextEditorHighlightingPass.java:55) at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.lambda$null$1(PassExecutorService.java:429) at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1106) at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.lambda$doRun$2(PassExecutorService.java:422) at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:591) at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:537) at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:59) at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.doRun(PassExecutorService.java:421) at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.lambda$run$0(PassExecutorService.java:397) at com.intellij.openapi.application.impl.ReadMostlyRWLock.executeByImpatientReader(ReadMostlyRWLock.java:164) at com.intellij.openapi.application.impl.ApplicationImpl.executeByImpatientReader(ApplicationImpl.java:204) at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.run(PassExecutorService.java:395) at com.intellij.concurrency.JobLauncherImpl$VoidForkJoinTask$1.exec(JobLauncherImpl.java:161) at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020) at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656) at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594) at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)