Originally reported as https://youtrack.jetbrains.com/issue/IDEA-359567
See https://plugins.jetbrains.com/docs/intellij/threading-model.html for guidlines how to move blocking calls out of EventDispatchThread
ava.lang.Throwable: Slow operations are prohibited on EDT. See SlowOperations.assertSlowOperationsAreAllowed javadoc.
	at com.intellij.openapi.diagnostic.Logger.error(Logger.java:376)
	at com.intellij.util.SlowOperations.assertSlowOperationsAreAllowed(SlowOperations.java:102)
	at com.intellij.workspaceModel.core.fileIndex.impl.WorkspaceFileIndexDataImpl.ensureIsUpToDate(WorkspaceFileIndexDataImpl.kt:151)
	at com.intellij.workspaceModel.core.fileIndex.impl.WorkspaceFileIndexDataImpl.getFileInfo(WorkspaceFileIndexDataImpl.kt:96)
	at com.intellij.workspaceModel.core.fileIndex.impl.WorkspaceFileIndexImpl.getFileInfo(WorkspaceFileIndexImpl.kt:264)
	at com.intellij.workspaceModel.core.fileIndex.impl.WorkspaceFileIndexImpl.findFileSetWithCustomData(WorkspaceFileIndexImpl.kt:247)
	at com.intellij.openapi.roots.impl.ProjectFileIndexImpl.getModuleForFile(ProjectFileIndexImpl.java:102)
	at com.intellij.openapi.roots.impl.ProjectFileIndexImpl.getModuleForFile(ProjectFileIndexImpl.java:95)
	at com.android.tools.idea.projectsystem.ProjectSystemUtil.isAndroidTestFile$lambda$5(AndroidProjectSystem.kt:269)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$OTelMonitor.callWrapped$$$capture(NonBlockingReadActionImpl.java:857)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$OTelMonitor.callWrapped(NonBlockingReadActionImpl.java)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$OTelMonitor$MonitoredComputation.call(NonBlockingReadActionImpl.java:889)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.insideReadAction(NonBlockingReadActionImpl.java:618)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.attemptComputation(NonBlockingReadActionImpl.java:565)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.executeSynchronously(NonBlockingReadActionImpl.java:506)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl.executeSynchronously(NonBlockingReadActionImpl.java:222)
	at com.android.tools.idea.projectsystem.ProjectSystemUtil.isAndroidTestFile(AndroidProjectSystem.kt:271)
	at com.android.tools.idea.projectsystem.gradle.GradleModuleSystem.getClassFileFinderForSourceFile(GradleModuleSystem.kt:155)
	at com.android.tools.idea.rendering.StudioModuleRenderContext.createInjectableClassLoaderLoader$lambda$0(StudioModuleRenderContext.kt:53)
	at com.android.tools.idea.rendering.classloading.loaders.ProjectSystemClassLoader.getClassContentForFqcn$lambda$3(ProjectSystemClassLoader.kt:68)
	at com.intellij.util.SlowOperations.allowSlowOperations(SlowOperations.java:193)
	at com.android.tools.idea.rendering.classloading.loaders.ProjectSystemClassLoader.getClassContentForFqcn(ProjectSystemClassLoader.kt:68)
	at com.android.tools.idea.rendering.classloading.loaders.ProjectSystemClassLoader.loadClass(ProjectSystemClassLoader.kt:83)
	at com.android.tools.idea.rendering.classloading.loaders.ListeningLoader.loadClass(ListeningLoader.kt:30)
	at com.android.tools.rendering.classloading.loaders.AsmTransformingLoader.loadClass(AsmTransformingLoader.kt:43)
	at com.android.tools.rendering.classloading.loaders.MultiLoader.loadClass$lambda$0(MultiLoader.kt:26)
	at kotlin.sequences.TransformingSequence$iterator$1.next(Sequences.kt:210)
	at kotlin.sequences.FilteringSequence$iterator$1.calcNext(Sequences.kt:170)
	at kotlin.sequences.FilteringSequence$iterator$1.hasNext(Sequences.kt:194)
	at kotlin.sequences.SequencesKt___SequencesKt.firstOrNull(_Sequences.kt:172)