KT-4485 getGenericInterfaces vs getInterfaces for kotlin classes

#KT-4485 fixed

compiler/backend/src/org/jetbrains/jet/codegen/ImplementationBodyCodegen.java

@@ -350,6 +350,10 @@ public class ImplementationBodyCodegen extends ClassBodyCodegen {
         sw.writeSuperclassEnd();
 
         LinkedHashSet<String> superInterfaces = new LinkedHashSet<String>();
+        sw.writeInterface();
+        sw.writeClassBegin(Type.getObjectType(JvmAbi.JET_OBJECT.getInternalName()));
+        sw.writeClassEnd();
+        sw.writeInterfaceEnd();
         superInterfaces.add(JvmAbi.JET_OBJECT.getInternalName());
 
         for (JetDelegationSpecifier specifier : myClass.getDelegationSpecifiers()) {

compiler/testData/codegen/boxWithStdlib/regressions/getGenericInterfaces.kt

@@ -0,0 +1,24 @@
+// KT-4485 getGenericInterfaces vs getInterfaces for kotlin classes
+
+class SimpleClass
+
+class ClassWithNonGenericSuperInterface: Cloneable
+
+class ClassWithGenericSuperInterface: java.util.Comparator<String> {
+    override fun compare(a: String, b: String): Int = 0
+}
+
+fun check(klass: Class<*>) {
+    val interfaces = klass.getInterfaces().toList()
+    val genericInterfaces = klass.getGenericInterfaces().toList()
+    if (interfaces.size != genericInterfaces.size) {
+        throw AssertionError("interfaces=$interfaces, genericInterfaces=$genericInterfaces")
+    }
+}
+
+fun box(): String {
+    check(javaClass<SimpleClass>())
+    check(javaClass<ClassWithNonGenericSuperInterface>())
+    check(javaClass<ClassWithGenericSuperInterface>())
+    return "OK"
+}

compiler/tests/org/jetbrains/jet/codegen/generated/BlackBoxWithStdlibCodegenTestGenerated.java

@@ -903,6 +903,11 @@ public class BlackBoxWithStdlibCodegenTestGenerated extends AbstractBlackBoxCode
             doTestWithStdlib("compiler/testData/codegen/boxWithStdlib/regressions/generic.kt");
         }
         
+        @TestMetadata("getGenericInterfaces.kt")
+        public void testGetGenericInterfaces() throws Exception {
+            doTestWithStdlib("compiler/testData/codegen/boxWithStdlib/regressions/getGenericInterfaces.kt");
+        }
+        
         @TestMetadata("implicitlyCastToHashable.kt")
         public void testImplicitlyCastToHashable() throws Exception {
             doTestWithStdlib("compiler/testData/codegen/boxWithStdlib/regressions/implicitlyCastToHashable.kt");