test for KT-1578 (duplicate of KT-1980)

compiler/testData/codegen/regressions/kt1578.kt

@@ -0,0 +1,9 @@
+fun box() : String {
+    var i = 0
+        {
+            i++
+        }()
+    i++  //the problem is here
+//    i = i + 1  //this way it works
+    return if (i == 2) "OK" else "fail"
+}

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

@@ -396,4 +396,9 @@ public class ClassGenTest extends CodegenTestCase {
         createEnvironmentWithMockJdkAndIdeaAnnotations(CompilerSpecialMode.JDK_HEADERS);
         blackBoxFile("regressions/kt1980.kt");
     }
+
+    public void testKt1578() throws Exception {
+        createEnvironmentWithMockJdkAndIdeaAnnotations(CompilerSpecialMode.JDK_HEADERS);
+        blackBoxFile("regressions/kt1578.kt");
+    }
 }