[API Usage] Refine supertypes when getting content of member scope

compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/descriptors/LazyClassMemberScope.kt

@@ -76,7 +76,7 @@ open class LazyClassMemberScope(
 
     protected open fun computeExtraDescriptors(location: LookupLocation): Collection<DeclarationDescriptor> {
         val result = ArrayList<DeclarationDescriptor>()
-        for (supertype in thisDescriptor.typeConstructor.supertypes) {
+        for (supertype in supertypes) {
             for (descriptor in supertype.memberScope.getContributedDescriptors()) {
                 if (descriptor is FunctionDescriptor) {
                     result.addAll(getContributedFunctions(descriptor.name, location))
@@ -96,11 +96,16 @@ open class LazyClassMemberScope(
         return result
     }
 
+    val supertypes by storageManager.createLazyValue {
+        @UseExperimental(TypeRefinement::class)
+        kotlinTypeRefiner.refineSupertypes(thisDescriptor)
+    }
+
     private val _variableNames: MutableSet<Name>
             by lazy(LazyThreadSafetyMode.PUBLICATION) {
                 mutableSetOf<Name>().apply {
                     addAll(declarationProvider.getDeclarationNames())
-                    thisDescriptor.typeConstructor.supertypes.flatMapTo(this) {
+                    supertypes.flatMapTo(this) {
                         it.memberScope.getVariableNames()
                     }
                 }
@@ -110,7 +115,7 @@ open class LazyClassMemberScope(
             by lazy(LazyThreadSafetyMode.PUBLICATION) {
                 mutableSetOf<Name>().apply {
                     addAll(declarationProvider.getDeclarationNames())
-                    thisDescriptor.typeConstructor.supertypes.flatMapTo(this) {
+                    supertypes.flatMapTo(this) {
                         it.memberScope.getFunctionNames()
                     }
 
@@ -203,7 +208,7 @@ open class LazyClassMemberScope(
         val location = NoLookupLocation.FOR_ALREADY_TRACKED
 
         val fromSupertypes = arrayListOf<SimpleFunctionDescriptor>()
-        for (supertype in thisDescriptor.typeConstructor.supertypes) {
+        for (supertype in supertypes) {
             fromSupertypes.addAll(supertype.memberScope.getContributedFunctions(name, location))
         }
         result.addAll(generateDelegatingDescriptors(name, EXTRACT_FUNCTIONS, result))
@@ -345,7 +350,7 @@ open class LazyClassMemberScope(
 
         // Members from supertypes
         val fromSupertypes = ArrayList<PropertyDescriptor>()
-        for (supertype in thisDescriptor.typeConstructor.supertypes) {
+        for (supertype in supertypes) {
             fromSupertypes.addAll(supertype.memberScope.getContributedVariables(name, NoLookupLocation.FOR_ALREADY_TRACKED))
         }
         result.addAll(generateDelegatingDescriptors(name, EXTRACT_PROPERTIES, result))

core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/descriptors/DeserializedClassDescriptor.kt

@@ -217,6 +217,11 @@ class DeserializedClassDescriptor(
             computeDescriptors(DescriptorKindFilter.ALL, MemberScope.ALL_NAME_FILTER, NoLookupLocation.WHEN_GET_ALL_DESCRIPTORS)
         }
 
+        private val refinedSupertypes = c.storageManager.createLazyValue {
+            @UseExperimental(TypeRefinement::class)
+            kotlinTypeRefiner.refineSupertypes(classDescriptor)
+        }
+
         override fun getContributedDescriptors(
             kindFilter: DescriptorKindFilter, nameFilter: (Name) -> Boolean
         ): Collection<DeclarationDescriptor> = allDescriptors()
@@ -233,7 +238,7 @@ class DeserializedClassDescriptor(
 
         override fun computeNonDeclaredFunctions(name: Name, functions: MutableCollection<SimpleFunctionDescriptor>) {
             val fromSupertypes = ArrayList<SimpleFunctionDescriptor>()
-            for (supertype in classDescriptor.getTypeConstructor().supertypes) {
+            for (supertype in refinedSupertypes()) {
                 fromSupertypes.addAll(supertype.memberScope.getContributedFunctions(name, NoLookupLocation.FOR_ALREADY_TRACKED))
             }
 
@@ -247,7 +252,7 @@ class DeserializedClassDescriptor(
 
         override fun computeNonDeclaredProperties(name: Name, descriptors: MutableCollection<PropertyDescriptor>) {
             val fromSupertypes = ArrayList<PropertyDescriptor>()
-            for (supertype in classDescriptor.getTypeConstructor().supertypes) {
+            for (supertype in refinedSupertypes()) {
                 fromSupertypes.addAll(supertype.memberScope.getContributedVariables(name, NoLookupLocation.FOR_ALREADY_TRACKED))
             }
             generateFakeOverrides(name, fromSupertypes, descriptors)