Support default method invocation via super

#KT-5970 Fixed

compiler/backend/src/org/jetbrains/kotlin/codegen/state/JetTypeMapper.java

@@ -32,6 +32,7 @@ import org.jetbrains.kotlin.descriptors.*;
 import org.jetbrains.kotlin.descriptors.annotations.Annotated;
 import org.jetbrains.kotlin.descriptors.annotations.AnnotationDescriptor;
 import org.jetbrains.kotlin.load.java.JvmAbi;
+import org.jetbrains.kotlin.load.java.descriptors.JavaClassDescriptor;
 import org.jetbrains.kotlin.load.kotlin.PackageClassUtils;
 import org.jetbrains.kotlin.load.kotlin.PackagePartClassUtils;
 import org.jetbrains.kotlin.load.kotlin.nativeDeclarations.NativeDeclarationsPackage;
@@ -566,10 +567,17 @@ public class JetTypeMapper {
             ownerForDefaultImpl = isInterface(ownerForDefault) ? mapTraitImpl(ownerForDefault) : ownerForDefaultParam;
 
             if (isInterface && superCall) {
-                invokeOpcode = INVOKESTATIC;
-                signature = mapSignature(functionDescriptor, OwnerKind.TRAIT_IMPL);
-                owner = mapTraitImpl(currentOwner);
                 thisClass = mapClass(currentOwner);
+                if (declarationOwner instanceof JavaClassDescriptor) {
+                    invokeOpcode = INVOKESPECIAL;
+                    signature = mapSignature(functionDescriptor);
+                    owner = thisClass;
+                }
+                else {
+                    invokeOpcode = INVOKESTATIC;
+                    signature = mapSignature(functionDescriptor, OwnerKind.TRAIT_IMPL);
+                    owner = mapTraitImpl(currentOwner);
+                }
             }
             else {
                 if (isStaticDeclaration(functionDescriptor) ||

compiler/java8-tests/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxWithJava8CodegenTestGenerated.java

@@ -71,6 +71,12 @@ public class BlackBoxWithJava8CodegenTestGenerated extends AbstractBlackBoxCodeg
         doTestWithJava(fileName);
     }
 
+    @TestMetadata("invokeDefaultViaSuper")
+    public void testInvokeDefaultViaSuper() throws Exception {
+        String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/java8/boxWithJava/invokeDefaultViaSuper/");
+        doTestWithJava(fileName);
+    }
+
     @TestMetadata("samOnInterfaceWithDefaultMethod")
     public void testSamOnInterfaceWithDefaultMethod() throws Exception {
         String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/java8/boxWithJava/samOnInterfaceWithDefaultMethod/");

compiler/testData/codegen/java8/boxWithJava/invokeDefaultViaSuper/Test.java

@@ -0,0 +1,5 @@
+public interface Test {
+    default String test() {
+        return "OK";
+    }
+}

compiler/testData/codegen/java8/boxWithJava/invokeDefaultViaSuper/tesk.kt

@@ -0,0 +1,32 @@
+trait KTrait : Test {
+
+}
+
+class KClass : Test {
+    fun ktest(): String {
+        return super.test() + test()
+    }
+}
+
+class KTClass : KTrait {
+    fun ktest(): String {
+        return super.test() + test()
+    }
+}
+
+
+fun box(): String {
+    val p = object : KTrait {
+        fun ktest(): String {
+            return super.test() + test()
+        }
+    }.ktest()
+
+    if (p != "OKOK") return "fail1: $p"
+
+    if (KClass().ktest() != "OKOK") return "fail 2: ${KClass().ktest()}"
+
+    if (KTClass().ktest() != "OKOK") return "fail 3: ${KTClass().ktest()}"
+
+    return "OK"
+}