test for fixed KT-1721

compiler/testData/codegen/regressions/kt1721.kt

@@ -0,0 +1,6 @@
+class T(val f : () -> Any?) {
+    fun call() : Any? = f()
+}
+fun box(): String {
+    return T({ "OK" }).call() as String
+}

compiler/tests/org/jetbrains/jet/codegen/ClassGenTest.java

@@ -412,6 +412,11 @@ public class ClassGenTest extends CodegenTestCase {
         blackBoxFile("regressions/kt1726.kt");
     }
 
+    public void testKt1721() {
+        createEnvironmentWithMockJdkAndIdeaAnnotations(CompilerSpecialMode.JDK_HEADERS);
+        blackBoxFile("regressions/kt1721.kt");
+    }
+
     public void testKt1976() {
         createEnvironmentWithMockJdkAndIdeaAnnotations(CompilerSpecialMode.JDK_HEADERS);
         blackBoxFile("regressions/kt1976.kt");