EA- 235760 // additional logging

https://ea.jetbrains.com/browser/ea_problems/235760

compiler/backend/src/org/jetbrains/kotlin/codegen/JvmRuntimeTypes.kt

@@ -24,6 +24,8 @@ import org.jetbrains.kotlin.resolve.calls.checkers.isRestrictsSuspensionReceiver
 import org.jetbrains.kotlin.resolve.descriptorUtil.builtIns
 import org.jetbrains.kotlin.storage.LockBasedStorageManager
 import org.jetbrains.kotlin.types.KotlinType
+import org.jetbrains.kotlin.utils.KotlinExceptionWithAttachments
+
 
 class JvmRuntimeTypes(
     module: ModuleDescriptor,
@@ -96,6 +98,14 @@ class JvmRuntimeTypes(
             else
                 descriptor
 
+        if (actualFunctionDescriptor.returnType == null)
+            throw KotlinExceptionWithAttachments(
+                "Return type for function description is null. Super type cannot be calculated." +
+                        "initDesc=${descriptor}, actDesc=${actualFunctionDescriptor}, isReleaseCoroutines=${
+                            languageVersionSettings.supportsFeature(LanguageFeature.ReleaseCoroutines)
+                        }"
+            )
+
         val functionType = createFunctionType(
             descriptor.builtIns,
             Annotations.EMPTY,