KT-4107 Data objects

compiler/testData/codegen/box/dataObjects/serialization.kt

@@ -0,0 +1,19 @@
+// LANGUAGE: +DataObjects
+// WITH_STDLIB
+// TARGET_BACKEND: JVM_IR
+// FULL_JDK
+// CHECK_BYTECODE_LISTING
+
+import java.io.*
+
+data object NonSerializableDataObject
+
+data object SerializableDataObject: Serializable
+
+fun box(): String {
+    ByteArrayOutputStream().use { baos ->
+        ObjectOutputStream(baos).use { oos -> oos.writeObject(SerializableDataObject) }
+        ByteArrayInputStream(baos.toByteArray()).use { bais -> assert(java.io.ObjectInputStream(bais).readObject() === SerializableDataObject) }
+    }
+    return "OK"
+}