diff --git a/compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/declarations/DeclarationProviderFactoryService.kt b/compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/declarations/DeclarationProviderFactoryService.kt
index 0189ba26ab6..c81982b93cb 100644
--- a/compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/declarations/DeclarationProviderFactoryService.kt
+++ b/compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/declarations/DeclarationProviderFactoryService.kt
@@ -18,12 +18,12 @@ package org.jetbrains.kotlin.resolve.lazy.declarations
 
 import com.intellij.openapi.components.ServiceManager
 import com.intellij.openapi.project.Project
+import com.intellij.openapi.vfs.VirtualFile
 import com.intellij.psi.search.DelegatingGlobalSearchScope
 import com.intellij.psi.search.GlobalSearchScope
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.storage.StorageManager
-import com.intellij.openapi.vfs.VirtualFile
-import java.util.HashSet
+import java.util.*
 
 abstract class DeclarationProviderFactoryService {
 
@@ -60,5 +60,7 @@ abstract class DeclarationProviderFactoryService {
         private val originals = syntheticFiles.mapNotNullTo(HashSet<VirtualFile>()) { it.originalFile.virtualFile }
 
         override fun contains(file: VirtualFile) = super.contains(file) && file !in originals
+
+        override fun toString() = "SyntheticFilesFilteringScope($myBaseScope)"
     }
 }
diff --git a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/IdeaModuleInfos.kt b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/IdeaModuleInfos.kt
index e3fb8d90645..3999af97ca9 100644
--- a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/IdeaModuleInfos.kt
+++ b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/IdeaModuleInfos.kt
@@ -187,6 +187,8 @@ private class ModuleProductionSourceScope(module: Module) : ModuleSourceScope(mo
     override fun hashCode(): Int = 31 * module.hashCode()
 
     override fun contains(file: VirtualFile) = moduleFileIndex.isInSourceContent(file) && !moduleFileIndex.isInTestSourceContent(file)
+
+    override fun toString() = "ModuleProductionSourceScope($module)"
 }
 
 private class ModuleTestSourceScope(module: Module) : ModuleSourceScope(module) {
@@ -200,6 +202,8 @@ private class ModuleTestSourceScope(module: Module) : ModuleSourceScope(module)
     override fun hashCode(): Int = 37 * module.hashCode()
 
     override fun contains(file: VirtualFile) = moduleFileIndex.isInTestSourceContent(file)
+
+    override fun toString() = "ModuleTestSourceScope($module)"
 }
 
 open class LibraryInfo(val project: Project, val library: Library) : IdeaModuleInfo {
@@ -287,6 +291,8 @@ private class LibraryWithoutSourceScope(project: Project, private val library: L
     override fun equals(other: Any?) = other is LibraryWithoutSourceScope && library == other.library
 
     override fun hashCode() = library.hashCode()
+
+    override fun toString() = "LibraryWithoutSourceScope($library)"
 }
 
 //TODO: (module refactoring) android sdk has modified scope
@@ -296,6 +302,8 @@ private class SdkScope(project: Project, private val sdk: Sdk) :
     override fun equals(other: Any?) = other is SdkScope && sdk == other.sdk
 
     override fun hashCode() = sdk.hashCode()
+
+    override fun toString() = "SdkScope($sdk)"
 }
 
 internal fun IdeaModuleInfo.isLibraryClasses() = this is SdkInfo || this is LibraryInfo
diff --git a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/stubindex/KotlinSourceFilterScope.kt b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/stubindex/KotlinSourceFilterScope.kt
index c648aec0284..4ed7bb72226 100644
--- a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/stubindex/KotlinSourceFilterScope.kt
+++ b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/stubindex/KotlinSourceFilterScope.kt
@@ -48,6 +48,11 @@ class KotlinSourceFilterScope private constructor(
         )
     }
 
+    override fun toString(): String {
+        return "KotlinSourceFilterScope(delegate=$myBaseScope src=$includeProjectSourceFiles libSrc=$includeLibrarySourceFiles " +
+               "cls=$includeClassFiles script=$includeScriptDependencies)"
+    }
+
     companion object {
         @JvmStatic
         fun sourcesAndLibraries(delegate: GlobalSearchScope, project: Project) = create(delegate, true, true, true, true, project)