test for already fixed KT-1976

compiler/testData/codegen/regressions/kt1976.kt

@@ -0,0 +1,8 @@
+class A {
+    public val f : ()->String = {"OK"}
+}
+
+fun box(): String {
+    val a = A()
+    return a.f() // does not work: (in runtime) ClassCastException: A cannot be cast to jet.Function0
+}

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

@@ -411,4 +411,9 @@ public class ClassGenTest extends CodegenTestCase {
         createEnvironmentWithMockJdkAndIdeaAnnotations(CompilerSpecialMode.JDK_HEADERS);
         blackBoxFile("regressions/kt1726.kt");
     }
+
+    public void testKt1976() throws Exception {
+        createEnvironmentWithMockJdkAndIdeaAnnotations(CompilerSpecialMode.JDK_HEADERS);
+        blackBoxFile("regressions/kt1976.kt");
+    }
 }