Intellij not showing contents of certain folder in project view.

Intellij does not want to show the contents of a certain folder in my Grails application. It doesn't want to display the contents from a specific folder under my controller folder. If I want to open a file accessed from that root, I have to use file->open.

here is the idea.log for it:

2017-06-06 12:27:51,376 [ 582940]  ERROR - til.concurrency.QueueProcessor - java.lang.AssertionError
java.lang.RuntimeException: java.lang.AssertionError
    at com.intellij.ide.util.treeView.AbstractTreeUi$54$1.perform(AbstractTreeUi.java:3378)
    at com.intellij.ide.util.treeView.TreeRunnable.run(TreeRunnable.java:36)
    at com.intellij.ide.util.treeView.AbstractTreeBuilder$2.perform(AbstractTreeBuilder.java:467)
    at com.intellij.ide.util.treeView.TreeRunnable.run(TreeRunnable.java:36)
    at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:931)
    at com.intellij.ide.util.treeView.AbstractTreeBuilder.runBackgroundLoading(AbstractTreeBuilder.java:464)
    at com.intellij.ide.util.treeView.AbstractTreeUi$54.perform(AbstractTreeUi.java:3333)
    at com.intellij.ide.util.treeView.TreeRunnable.run(TreeRunnable.java:36)
    at com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:176)
    at com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:556)
    at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:501)
    at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:66)
    at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:163)
    at com.intellij.ide.util.treeView.AbstractTreeUi$55.perform(AbstractTreeUi.java:3395)
    at com.intellij.ide.util.treeView.TreeRunnable.run(TreeRunnable.java:36)
    at com.intellij.ide.util.treeView.AbstractTreeUi.lambda$new$0(AbstractTreeUi.java:98)
    at com.intellij.util.concurrency.QueueProcessor.lambda$null$0(QueueProcessor.java:106)
    at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:223)
    at com.intellij.util.concurrency.QueueProcessor.lambda$wrappingProcessor$1(QueueProcessor.java:106)
    at com.intellij.util.concurrency.QueueProcessor.lambda$null$2(QueueProcessor.java:203)
    at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:223)
    at com.intellij.util.concurrency.QueueProcessor.lambda$startProcessing$3(QueueProcessor.java:203)
    at com.intellij.openapi.application.impl.ApplicationImpl$2.run(ApplicationImpl.java:334)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.AssertionError
    at org.jetbrains.plugins.groovy.lang.psi.impl.statements.typedef.GrTypeDefinitionMembersCache.getTransformationResult(GrTypeDefinitionMembersCache.java:123)
    at org.jetbrains.plugins.groovy.lang.psi.impl.statements.typedef.GrTypeDefinitionMembersCache.getInnerClasses(GrTypeDefinitionMembersCache.java:78)
    at org.jetbrains.plugins.groovy.lang.psi.impl.statements.typedef.GrTypeDefinitionImpl.getInnerClasses(GrTypeDefinitionImpl.java:313)
    at org.jetbrains.plugins.groovy.lang.psi.util.GrClassImplUtil.findInnerClassByName(GrClassImplUtil.java:91)
    at org.jetbrains.plugins.groovy.lang.psi.impl.statements.typedef.GrTypeDefinitionImpl.findInnerClassByName(GrTypeDefinitionImpl.java:398)
    at org.jetbrains.plugins.groovy.lang.psi.impl.javaView.GroovyLightInnerClassFinder.findInnerLightClass(GroovyLightInnerClassFinder.kt:40)
    at org.jetbrains.plugins.groovy.lang.psi.impl.javaView.GroovyLightInnerClassFinder.findClasses(GroovyLightInnerClassFinder.kt:29)
    at com.intellij.psi.impl.JavaPsiFacadeImpl.findClasses(JavaPsiFacadeImpl.java:173)
    at com.intellij.psi.impl.file.PsiPackageImpl.getCachedClassesByName(PsiPackageImpl.java:210)
    at com.intellij.psi.impl.file.PsiPackageImpl.findClassByShortName(PsiPackageImpl.java:271)
    at com.intellij.psi.impl.file.PsiPackageImpl.processDeclarations(PsiPackageImpl.java:305)
    at org.jetbrains.plugins.groovy.lang.psi.impl.toplevel.imports.GrImportStatementImpl.processDeclarationsForMultipleElements(GrImportStatementImpl.java:241)
    at org.jetbrains.plugins.groovy.lang.psi.impl.toplevel.imports.GrImportStatementImpl.processDeclarations(GrImportStatementImpl.java:86)
    at org.jetbrains.plugins.groovy.lang.psi.impl.GroovyImportHelper.processImports(GroovyImportHelper.java:91)
    at org.jetbrains.plugins.groovy.lang.psi.impl.GroovyFileImpl.processImports(GroovyFileImpl.java:273)
    at org.jetbrains.plugins.groovy.lang.psi.impl.GroovyFileImpl.processDeclarationsNoGuess(GroovyFileImpl.java:226)
    at org.jetbrains.plugins.groovy.lang.psi.impl.GroovyFileImpl.processDeclarations(GroovyFileImpl.java:143)
    at org.jetbrains.plugins.groovy.lang.psi.util.PsiTreeUtilKt.treeWalkUp(psiTreeUtil.kt:62)
    at org.jetbrains.plugins.groovy.lang.psi.util.PsiTreeUtilKt.treeWalkUp$default(psiTreeUtil.kt:60)
    at org.jetbrains.plugins.groovy.lang.psi.util.PsiTreeUtilKt.treeWalkUp(psiTreeUtil.kt)
    at org.jetbrains.plugins.groovy.lang.psi.impl.types.GrCodeReferenceElementImpl$OurResolver._resolve(GrCodeReferenceElementImpl.java:338)
    at org.jetbrains.plugins.groovy.lang.psi.impl.types.GrCodeReferenceElementImpl$OurResolver.resolve(GrCodeReferenceElementImpl.java:272)
    at org.jetbrains.plugins.groovy.lang.psi.impl.types.GrCodeReferenceElementImpl$OurResolver.resolve(GrCodeReferenceElementImpl.java:266)
    at com.intellij.psi.impl.source.resolve.ResolveCache.lambda$resolve$0(ResolveCache.java:140)
    at com.intellij.openapi.util.RecursionManager$2.doPreventingRecursion(RecursionManager.java:112)
    at com.intellij.psi.impl.source.resolve.ResolveCache.resolve(ResolveCache.java:139)
    at com.intellij.psi.impl.source.resolve.ResolveCache.resolveWithCaching(ResolveCache.java:163)
    at com.intellij.psi.impl.source.resolve.ResolveCache.resolveWithCaching(ResolveCache.java:155)
    at org.jetbrains.plugins.groovy.lang.psi.impl.InferenceContext$1.multiResolve(InferenceContext.java:64)
    at org.jetbrains.plugins.groovy.lang.psi.impl.types.GrCodeReferenceElementImpl.multiResolve(GrCodeReferenceElementImpl.java:488)
    at org.jetbrains.plugins.groovy.lang.psi.GrReferenceElement.advancedResolve(GrReferenceElement.java:43)
    at org.jetbrains.plugins.groovy.lang.psi.impl.GrClassReferenceType.resolveGenerics(GrClassReferenceType.java:64)
    at org.jetbrains.plugins.groovy.lang.psi.impl.GrClassReferenceType.resolve(GrClassReferenceType.java:44)
    at com.intellij.psi.util.TypeConversionUtil$2.visitClassType(TypeConversionUtil.java:1266)
    at com.intellij.psi.util.TypeConversionUtil$2.visitClassType(TypeConversionUtil.java:1257)
    at com.intellij.psi.PsiClassType.accept(PsiClassType.java:230)
    at com.intellij.psi.util.TypeConversionUtil.erasure(TypeConversionUtil.java:1257)
    at com.intellij.psi.util.MethodSignatureUtil.calcErasedParameterTypes(MethodSignatureUtil.java:91)
    at com.intellij.psi.util.MethodSignatureBase.getErasedParameterTypes(MethodSignatureBase.java:82)
    at com.intellij.psi.util.MethodSignatureBase.hashCode(MethodSignatureBase.java:97)
    at com.intellij.psi.util.MethodSignatureUtil$2.computeHashCode(MethodSignatureUtil.java:52)
    at com.intellij.psi.util.MethodSignatureUtil$2.computeHashCode(MethodSignatureUtil.java:49)
    at gnu.trove.TObjectHash.insertionIndex(TObjectHash.java:224)
    at gnu.trove.THashSet.add(THashSet.java:137)
    at org.jetbrains.plugins.groovy.transformations.TransformationContextImpl.doAddMethod(TransformationContextImpl.java:195)
    at org.jetbrains.plugins.groovy.transformations.TransformationContextImpl.addMethod(TransformationContextImpl.java:208)
    at org.jetbrains.plugins.groovy.transformations.TransformationContext.addMethod(TransformationContext.java:93)
    at org.jetbrains.plugins.groovy.transformations.impl.DefaultTransformationSupport.applyTransformation(DefaultTransformationSupport.java:55)
    at org.jetbrains.plugins.groovy.transformations.TransformationUtilKt.transformDefinition(TransformationUtil.kt:44)
    at org.jetbrains.plugins.groovy.lang.psi.impl.statements.typedef.GrTypeDefinitionMembersCache.lambda$getTransformationResult$9(GrTypeDefinitionMembersCache.java:125)
    at com.intellij.psi.util.CachedValuesManager.lambda$getCachedValue$0(CachedValuesManager.java:141)
    at com.intellij.psi.impl.PsiCachedValueImpl.doCompute(PsiCachedValueImpl.java:49)
    at com.intellij.util.CachedValueBase.getValueWithLock(CachedValueBase.java:222)
    at com.intellij.psi.impl.PsiCachedValue.getValueWithLock(PsiCachedValue.java:60)
    at com.intellij.psi.impl.PsiCachedValueImpl.getValue(PsiCachedValueImpl.java:38)
    at com.intellij.util.CachedValuesManagerImpl.getCachedValue(CachedValuesManagerImpl.java:87)
    at com.intellij.psi.util.CachedValuesManager.getCachedValue(CachedValuesManager.java:140)
    at com.intellij.psi.util.CachedValuesManager.getCachedValue(CachedValuesManager.java:127)
    at org.jetbrains.plugins.groovy.lang.psi.impl.statements.typedef.GrTypeDefinitionMembersCache.getTransformationResult(GrTypeDefinitionMembersCache.java:124)
    at org.jetbrains.plugins.groovy.lang.psi.impl.statements.typedef.GrTypeDefinitionMembersCache.getFields(GrTypeDefinitionMembersCache.java:93)
    at org.jetbrains.plugins.groovy.lang.psi.impl.statements.typedef.GrTypeDefinitionImpl.getFields(GrTypeDefinitionImpl.java:283)
    at org.jetbrains.plugins.groovy.lang.psi.impl.statements.typedef.GrTypeDefinitionImpl.getFields(GrTypeDefinitionImpl.java:75)
    at org.jetbrains.plugins.groovy.lang.resolve.CollectClassMembersUtil.getFields(CollectClassMembersUtil.java:193)
    at org.jetbrains.plugins.groovy.lang.resolve.CollectClassMembersUtil.processClass(CollectClassMembersUtil.java:154)
    at org.jetbrains.plugins.groovy.lang.resolve.CollectClassMembersUtil.lambda$buildCache$0(CollectClassMembersUtil.java:131)
    at com.intellij.psi.impl.PsiCachedValueImpl.doCompute(PsiCachedValueImpl.java:49)
    at com.intellij.util.CachedValueBase.getValueWithLock(CachedValueBase.java:222)
    at com.intellij.psi.impl.PsiCachedValue.getValueWithLock(PsiCachedValue.java:60)
    at com.intellij.psi.impl.PsiCachedValueImpl.getValue(PsiCachedValueImpl.java:38)
    at com.intellij.util.CachedValuesManagerImpl.getCachedValue(CachedValuesManagerImpl.java:87)
    at org.jetbrains.plugins.groovy.lang.resolve.CollectClassMembersUtil.buildCache(CollectClassMembersUtil.java:126)
    at org.jetbrains.plugins.groovy.lang.resolve.CollectClassMembersUtil.getCachedMembers(CollectClassMembersUtil.java:89)
    at org.jetbrains.plugins.groovy.lang.resolve.CollectClassMembersUtil.getAllInnerClasses(CollectClassMembersUtil.java:114)
    at org.jetbrains.plugins.groovy.lang.psi.util.GrClassImplUtil.findInnerClassByName(GrClassImplUtil.java:97)
    at org.jetbrains.plugins.groovy.lang.psi.impl.statements.typedef.GrTypeDefinitionImpl.findInnerClassByName(GrTypeDefinitionImpl.java:398)
    at org.jetbrains.plugins.groovy.lang.psi.impl.types.GrCodeReferenceElementImpl$OurResolver.resolveClassOrPackagePreferInner(GrCodeReferenceElementImpl.java:401)
    at org.jetbrains.plugins.groovy.lang.psi.impl.types.GrCodeReferenceElementImpl$OurResolver._resolve(GrCodeReferenceElementImpl.java:314)
    at org.jetbrains.plugins.groovy.lang.psi.impl.types.GrCodeReferenceElementImpl$OurResolver.resolve(GrCodeReferenceElementImpl.java:272)
    at org.jetbrains.plugins.groovy.lang.psi.impl.types.GrCodeReferenceElementImpl$OurResolver.resolve(GrCodeReferenceElementImpl.java:266)
    at com.intellij.psi.impl.source.resolve.ResolveCache.lambda$resolve$0(ResolveCache.java:140)
    at com.intellij.openapi.util.RecursionManager$2.doPreventingRecursion(RecursionManager.java:112)
    at com.intellij.psi.impl.source.resolve.ResolveCache.resolve(ResolveCache.java:139)
    at com.intellij.psi.impl.source.resolve.ResolveCache.resolveWithCaching(ResolveCache.java:163)
    at com.intellij.psi.impl.source.resolve.ResolveCache.resolveWithCaching(ResolveCache.java:155)
    at org.jetbrains.plugins.groovy.lang.psi.impl.InferenceContext$1.multiResolve(InferenceContext.java:64)
    at org.jetbrains.plugins.groovy.lang.psi.impl.types.GrCodeReferenceElementImpl.multiResolve(GrCodeReferenceElementImpl.java:488)
    at org.jetbrains.plugins.groovy.lang.psi.GrReferenceElement.advancedResolve(GrReferenceElement.java:43)
    at org.jetbrains.plugins.groovy.lang.psi.GrReferenceElement.resolve(GrReferenceElement.java:38)
    at org.jetbrains.plugins.groovy.lang.psi.impl.toplevel.imports.GrImportStatementImpl.processSingleClassImport(GrImportStatementImpl.java:190)
    at org.jetbrains.plugins.groovy.lang.psi.impl.toplevel.imports.GrImportStatementImpl.processDeclarationsForSingleElement(GrImportStatementImpl.java:117)
    at org.jetbrains.plugins.groovy.lang.psi.impl.toplevel.imports.GrImportStatementImpl.processDeclarations(GrImportStatementImpl.java:89)
    at org.jetbrains.plugins.groovy.lang.psi.impl.GroovyImportHelper.processImports(GroovyImportHelper.java:91)
    at org.jetbrains.plugins.groovy.lang.psi.impl.GroovyFileImpl.processImports(GroovyFileImpl.java:273)
    at org.jetbrains.plugins.groovy.lang.psi.impl.GroovyFileImpl.processDeclarationsNoGuess(GroovyFileImpl.java:224)
    at org.jetbrains.plugins.groovy.lang.psi.impl.GroovyFileImpl.buildDeclarationCache(GroovyFileImpl.java:163)
    at org.jetbrains.plugins.groovy.lang.psi.impl.GroovyFileImpl.lambda$new$1(GroovyFileImpl.java:92)
    at com.intellij.psi.impl.PsiCachedValueImpl.doCompute(PsiCachedValueImpl.java:49)
    at com.intellij.util.CachedValueBase.getValueWithLock(CachedValueBase.java:222)
    at com.intellij.psi.impl.PsiCachedValue.getValueWithLock(PsiCachedValue.java:60)
    at com.intellij.psi.impl.PsiCachedValueImpl.getValue(PsiCachedValueImpl.java:38)
    at org.jetbrains.plugins.groovy.lang.psi.impl.GroovyFileImpl.processDeclarations(GroovyFileImpl.java:140)
    at org.jetbrains.plugins.groovy.lang.psi.util.PsiTreeUtilKt.treeWalkUp(psiTreeUtil.kt:62)
    at org.jetbrains.plugins.groovy.lang.psi.util.PsiTreeUtilKt.treeWalkUp$default(psiTreeUtil.kt:60)
    at org.jetbrains.plugins.groovy.lang.psi.util.PsiTreeUtilKt.treeWalkUp(psiTreeUtil.kt)
    at org.jetbrains.plugins.groovy.lang.psi.impl.types.GrCodeReferenceElementImpl$OurResolver._resolve(GrCodeReferenceElementImpl.java:338)
    at org.jetbrains.plugins.groovy.lang.psi.impl.types.GrCodeReferenceElementImpl$OurResolver.resolve(GrCodeReferenceElementImpl.java:272)
    at org.jetbrains.plugins.groovy.lang.psi.impl.types.GrCodeReferenceElementImpl$OurResolver.resolve(GrCodeReferenceElementImpl.java:266)
    at com.intellij.psi.impl.source.resolve.ResolveCache.lambda$resolve$0(ResolveCache.java:140)
    at com.intellij.openapi.util.RecursionManager$2.doPreventingRecursion(RecursionManager.java:112)
    at com.intellij.psi.impl.source.resolve.ResolveCache.resolve(ResolveCache.java:139)
    at com.intellij.psi.impl.source.resolve.ResolveCache.resolveWithCaching(ResolveCache.java:163)
    at com.intellij.psi.impl.source.resolve.ResolveCache.resolveWithCaching(ResolveCache.java:155)
    at org.jetbrains.plugins.groovy.lang.psi.impl.InferenceContext$1.multiResolve(InferenceContext.java:64)
    at org.jetbrains.plugins.groovy.lang.psi.impl.types.GrCodeReferenceElementImpl.multiResolve(GrCodeReferenceElementImpl.java:488)
    at org.jetbrains.plugins.groovy.lang.psi.GrReferenceElement.advancedResolve(GrReferenceElement.java:43)
    at org.jetbrains.plugins.groovy.lang.psi.GrReferenceElement.resolve(GrReferenceElement.java:38)
    at org.jetbrains.plugins.groovy.lang.psi.impl.auxiliary.modifiers.GrAnnotationCollector.findAnnotationCollector(GrAnnotationCollector.java:200)
    at org.jetbrains.plugins.groovy.lang.psi.impl.auxiliary.modifiers.GrAnnotationCollector.hasAliases(GrAnnotationCollector.java:62)
    at org.jetbrains.plugins.groovy.lang.psi.impl.auxiliary.modifiers.GrAnnotationCollector.getResolvedAnnotations(GrAnnotationCollector.java:43)
    at org.jetbrains.plugins.groovy.lang.psi.impl.auxiliary.modifiers.GrModifierListImpl.lambda$getAnnotations$2(GrModifierListImpl.java:284)
    at com.intellij.psi.util.CachedValuesManager.lambda$getCachedValue$0(CachedValuesManager.java:141)
    at com.intellij.psi.impl.PsiCachedValueImpl.doCompute(PsiCachedValueImpl.java:49)
    at com.intellij.util.CachedValueBase.getValueWithLock(CachedValueBase.java:222)
    at com.intellij.psi.impl.PsiCachedValue.getValueWithLock(PsiCachedValue.java:60)
    at com.intellij.psi.impl.PsiCachedValueImpl.getValue(PsiCachedValueImpl.java:38)
    at com.intellij.psi.util.CachedValuesManager.getCachedValue(CachedValuesManager.java:137)
    at com.intellij.psi.util.CachedValuesManager.getCachedValue(CachedValuesManager.java:127)
    at org.jetbrains.plugins.groovy.lang.psi.impl.auxiliary.modifiers.GrModifierListImpl.getAnnotations(GrModifierListImpl.java:283)
    at org.jetbrains.plugins.groovy.lang.psi.impl.auxiliary.modifiers.GrModifierListImpl.getAnnotations(GrModifierListImpl.java:56)
    at com.intellij.codeInsight.AnnotationUtil$1.create(AnnotationUtil.java:130)
    at com.intellij.codeInsight.AnnotationUtil$1.create(AnnotationUtil.java:124)
    at com.intellij.util.containers.FactoryMap.get(FactoryMap.java:57)
    at com.intellij.codeInsight.AnnotationUtil.findOwnAnnotation(AnnotationUtil.java:140)
    at com.intellij.codeInsight.AnnotationUtil.findAnnotation(AnnotationUtil.java:113)
    at com.intellij.codeInsight.AnnotationUtil.findAnnotation(AnnotationUtil.java:96)
    at com.intellij.codeInsight.AnnotationUtil.findAnnotation(AnnotationUtil.java:89)
    at com.intellij.psi.impl.PsiImplUtil.isDeprecatedByAnnotation(PsiImplUtil.java:456)
    at org.jetbrains.plugins.groovy.lang.psi.impl.statements.typedef.GrTypeDefinitionImpl.isDeprecated(GrTypeDefinitionImpl.java:537)
    at com.intellij.ide.projectView.impl.nodes.BasePsiMemberNode.isDeprecated(BasePsiMemberNode.java:48)
    at com.intellij.ide.projectView.impl.nodes.AbstractPsiBasedNode.a(AbstractPsiBasedNode.java:157)
    at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:926)
    at com.intellij.ide.projectView.impl.nodes.AbstractPsiBasedNode.update(AbstractPsiBasedNode.java:138)
    at com.intellij.ide.util.treeView.PresentableNodeDescriptor.getUpdatedPresentation(PresentableNodeDescriptor.java:88)
    at com.intellij.ide.util.treeView.PresentableNodeDescriptor.update(PresentableNodeDescriptor.java:41)
    at com.intellij.ide.util.treeView.AbstractTreeBuilder.updateNodeDescriptor(AbstractTreeBuilder.java:577)
    at com.intellij.ide.util.treeView.AbstractTreeUi$22.perform(AbstractTreeUi.java:924)
    at com.intellij.ide.util.treeView.TreeRunnable.run(TreeRunnable.java:36)
    at com.intellij.ide.util.treeView.AbstractTreeUi.execute(AbstractTreeUi.java:1826)
    at com.intellij.ide.util.treeView.AbstractTreeUi.update(AbstractTreeUi.java:920)
    at com.intellij.ide.util.treeView.AbstractTreeUi.update(AbstractTreeUi.java:846)
    at com.intellij.ide.util.treeView.AbstractTreeUi.access$1600(AbstractTreeUi.java:64)
    at com.intellij.ide.util.treeView.AbstractTreeUi$43$1.perform(AbstractTreeUi.java:2672)
    at com.intellij.ide.util.treeView.TreeRunnable.run(TreeRunnable.java:36)
    at com.intellij.ide.util.treeView.AbstractTreeUi.execute(AbstractTreeUi.java:1826)
    at com.intellij.ide.util.treeView.AbstractTreeUi.access$2500(AbstractTreeUi.java:64)
    at com.intellij.ide.util.treeView.AbstractTreeUi$43.perform(AbstractTreeUi.java:2669)
    at com.intellij.ide.util.treeView.TreeRunnable.run(TreeRunnable.java:36)
    at com.intellij.ide.util.treeView.AbstractTreeUi.execute(AbstractTreeUi.java:1826)
    at com.intellij.ide.util.treeView.AbstractTreeUi.access$2500(AbstractTreeUi.java:64)
    at com.intellij.ide.util.treeView.AbstractTreeUi$54$1.perform(AbstractTreeUi.java:3342)
    ... 27 more
2017-06-06 12:27:51,378 [ 582942]  ERROR - til.concurrency.QueueProcessor - IntelliJ IDEA 2017.1.2  Build #IU-171.4249.39
2017-06-06 12:27:51,378 [ 582942]  ERROR - til.concurrency.QueueProcessor - JDK: 1.8.0_112-release
2017-06-06 12:27:51,378 [ 582942]  ERROR - til.concurrency.QueueProcessor - VM: OpenJDK 64-Bit Server VM
2017-06-06 12:27:51,378 [ 582942]  ERROR - til.concurrency.QueueProcessor - Vendor: JetBrains s.r.o
2017-06-06 12:27:51,378 [ 582942]  ERROR - til.concurrency.QueueProcessor - OS: Windows 7
2017-06-06 12:27:51,378 [ 582942]  ERROR - til.concurrency.QueueProcessor - Last Action: CloseAllEditors