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java.lang.Throwable: 	at com.intellij.openapi.diagnostic.Logger.error(Logger.java:127)	at com.intellij.util.indexing.IndexAccessValidator.checkAccessingIndexDuringOtherIndexProcessing(IndexAccessValidator.java:37)	at com.intellij.psi.stubs.StubIndexImpl.a(StubIndexImpl.java:340)	at com.intellij.psi.stubs.StubIndexImpl.processElements(StubIndexImpl.java:316)	at com.intellij.psi.stubs.StubIndex.getElements(StubIndex.java:146)	at com.intellij.psi.stubs.StubIndex.getElements(StubIndex.java:135)	at com.jetbrains.php.PhpIndexImpl.getByName(PhpIndexImpl.java:548)	at com.jetbrains.php.PhpIndexImpl.getByFQN(PhpIndexImpl.java:528)	at com.jetbrains.php.PhpIndexImpl.getClassesByFQN(PhpIndexImpl.java:558)	at com.jetbrains.php.PhpIndexImpl.getAnyByFQN(PhpIndexImpl.java:574)	at com.jetbrains.php.PhpIndexImpl.getBySignatureInternal(PhpIndexImpl.java:403)	at com.jetbrains.php.PhpIndexImpl.getBySignature(PhpIndexImpl.java:315)	at com.jetbrains.php.PhpIndexImpl.getClasses(PhpIndexImpl.java:484)	at com.jetbrains.php.PhpIndexImpl.getBySignatureInternal(PhpIndexImpl.java:422)	at com.jetbrains.php.PhpIndexImpl.getBySignature(PhpIndexImpl.java:315)	at com.jetbrains.php.PhpIndexImpl.completeType(PhpIndexImpl.java:80)	at com.jetbrains.php.lang.psi.resolve.types.PhpType.globalLocationAware(PhpType.java:393)	at com.jetbrains.php.lang.psi.elements.impl.MemberReferenceImpl.resolveGlobal(MemberReferenceImpl.java:145)	at com.phpuaca.util.PhpMethodResolver.resolveByMethodReference(PhpMethodResolver.java:15)	at com.phpuaca.completion.PHPUnitTypeProvider.getType(PHPUnitTypeProvider.java:53)	at com.jetbrains.php.lang.psi.resolve.types.PhpTypeInfo$1.internalCompute(PhpTypeInfo.java:50)	at com.jetbrains.php.lang.psi.resolve.types.PhpTypeInfo$1.internalCompute(PhpTypeInfo.java:38)	at com.intellij.openapi.util.Computable$NotNullCachedComputable.compute(Computable.java:52)	at com.intellij.openapi.util.RecursionManager$2.doPreventingRecursion(RecursionManager.java:112)	at com.intellij.openapi.util.RecursionManager.doPreventingRecursion(RecursionManager.java:68)	at com.jetbrains.php.lang.psi.resolve.types.PhpTypeInfo.getType(PhpTypeInfo.java:38)	at com.jetbrains.php.lang.psi.elements.impl.PhpReferenceImpl.getType(PhpReferenceImpl.java:207)	at com.jetbrains.php.codeInsight.typeInference.PhpTypeInferenceUtil.inferType(PhpTypeInferenceUtil.java:206)	at com.jetbrains.php.lang.psi.resolve.types.PhpTypeAnalyserVisitor.addTypeFromExpression(PhpTypeAnalyserVisitor.java:69)	at com.jetbrains.php.lang.psi.resolve.types.PhpTypeAnalyserVisitor.visitPhpVariable(PhpTypeAnalyserVisitor.java:145)	at com.jetbrains.php.lang.psi.elements.impl.VariableImpl.accept(VariableImpl.java:118)	at com.jetbrains.php.lang.psi.resolve.types.PhpTypeInfo$1.internalCompute(PhpTypeInfo.java:58)	at com.jetbrains.php.lang.psi.resolve.types.PhpTypeInfo$1.internalCompute(PhpTypeInfo.java:38)	at com.intellij.openapi.util.Computable$NotNullCachedComputable.compute(Computable.java:52)	at com.intellij.openapi.util.RecursionManager$2.doPreventingRecursion(RecursionManager.java:112)	at com.intellij.openapi.util.RecursionManager.doPreventingRecursion(RecursionManager.java:68)	at com.jetbrains.php.lang.psi.resolve.types.PhpTypeInfo.getType(PhpTypeInfo.java:38)	at com.jetbrains.php.codeInsight.typeInference.PhpTypeInferenceUtil.getType(PhpTypeInferenceUtil.java:235)	at com.jetbrains.php.lang.psi.elements.impl.VariableImpl.getType(VariableImpl.java:598)	at com.jetbrains.php.lang.psi.elements.impl.FunctionImpl.visitReturn(FunctionImpl.java:200)	at com.jetbrains.php.lang.psi.elements.impl.FunctionImpl.scanTree(FunctionImpl.java:232)	at com.jetbrains.php.lang.psi.elements.impl.FunctionImpl.getInferredType(FunctionImpl.java:172)	at com.jetbrains.php.lang.psi.elements.impl.FunctionImpl.getLocalType(FunctionImpl.java:144)	at com.jetbrains.php.lang.psi.elements.impl.MethodImpl.getLocalType(MethodImpl.java:230)	at com.jetbrains.php.lang.psi.stubs.PhpMethodElementType.createStub(PhpMethodElementType.java:32)	at com.jetbrains.php.lang.psi.stubs.PhpMethodElementType.createStub(PhpMethodElementType.java:17)	at com.intellij.psi.stubs.DefaultStubBuilder.buildStubTreeFor(DefaultStubBuilder.java:74)	at com.intellij.psi.stubs.DefaultStubBuilder.buildStubTree(DefaultStubBuilder.java:36)	at com.intellij.psi.impl.source.PsiFileImpl.calcStubTree(PsiFileImpl.java:1063)	at com.intellij.psi.stubs.StubProcessingHelperBase.processStubsInFile(StubProcessingHelperBase.java:76)	at com.intellij.psi.stubs.StubProcessingHelperBase.processStubsInFile(StubProcessingHelperBase.java:52)	at com.intellij.psi.stubs.StubIndexImpl$2.process(StubIndexImpl.java:324)	at com.intellij.psi.stubs.StubIndexImpl$StubIdListContainerAction.perform(StubIndexImpl.java:675)	at com.intellij.psi.stubs.StubIndexImpl$StubIdListContainerAction.perform(StubIndexImpl.java:663)	at com.intellij.util.indexing.ValueContainer.forEach(ValueContainer.java:81)	at com.intellij.psi.stubs.StubIndexImpl.a(StubIndexImpl.java:350)	at com.intellij.psi.stubs.StubIndexImpl.processElements(StubIndexImpl.java:316)	at com.intellij.psi.stubs.StubIndex.getElements(StubIndex.java:146)	at com.intellij.psi.stubs.StubIndex.getElements(StubIndex.java:135)	at com.jetbrains.php.PhpIndexImpl.getNamespacesByName(PhpIndexImpl.java:110)	at com.jetbrains.php.lang.psi.elements.impl.PhpNamespaceReferenceImpl$PhpNamespaceReferenceSegment.multiResolve(PhpNamespaceReferenceImpl.java:197)	at com.jetbrains.php.lang.psi.elements.impl.PhpNamespaceReferenceImpl$PhpNamespaceReferenceSegment.resolve(PhpNamespaceReferenceImpl.java:218)	at com.jetbrains.php.lang.inspections.codeSmell.PhpMethodOrClassCallIsNotCaseSensitiveInspection$1.visitPhpNamespaceReference(PhpMethodOrClassCallIsNotCaseSensitiveInspection.java:91)	at com.jetbrains.php.lang.psi.elements.impl.PhpNamespaceReferenceImpl.accept(PhpNamespaceReferenceImpl.java:72)	at com.intellij.codeInspection.InspectionEngine.acceptElements(InspectionEngine.java:81)	at com.intellij.codeInspection.InspectionEngine.createVisitorAndAcceptElements(InspectionEngine.java:69)	at com.intellij.codeInsight.daemon.impl.LocalInspectionsPass.a(LocalInspectionsPass.java:286)	at com.intellij.codeInsight.daemon.impl.LocalInspectionsPass.a(LocalInspectionsPass.java:254)	at com.intellij.concurrency.ApplierCompleter.b(ApplierCompleter.java:123)	at com.intellij.concurrency.ApplierCompleter.a(ApplierCompleter.java:212)	at com.intellij.concurrency.ApplierCompleter.b(ApplierCompleter.java:141)	at com.intellij.concurrency.ApplierCompleter.a(ApplierCompleter.java:212)	at com.intellij.concurrency.ApplierCompleter.b(ApplierCompleter.java:141)	at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1033)	at com.intellij.concurrency.ApplierCompleter.a(ApplierCompleter.java:96)	at com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:494)	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:443)	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:54)	at com.intellij.concurrency.ApplierCompleter.b(ApplierCompleter.java:106)	at com.intellij.concurrency.ApplierCompleter.compute(ApplierCompleter.java:91)	at java.util.concurrent.CountedCompleter.exec(CountedCompleter.java:731)	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)	at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)