Fix crash in typechecker

tests/language/regress_21793_test.dart

Index: tests/language/regress_21793_test.dart
diff --git a/tests/language/issue20476_test.dart b/tests/language/regress_21793_test.dart
similarity index 60%
copy from tests/language/issue20476_test.dart
copy to tests/language/regress_21793_test.dart
index 35890a672dc6476dd2b20129c02a0d757dbfb945..b4eca96ced2d33c296865d8fff84e5c928e4872d 100644
--- a/tests/language/issue20476_test.dart
+++ b/tests/language/regress_21793_test.dart
@@ -2,23 +2,14 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-import 'package:expect/expect.dart';
+// Regression test for issue 21793.
 
-foo() {
-  try {
-    try {
-      return 1;
-    } catch (e1) {
-    } finally {
-      return 3;
-    }
-  } catch (e2) {
-  } finally  {
-    return 5;
-  }
-}
+import 'package:expect/expect.dart';
 
+/*   /// 01: static type warning, runtime error
+class A { call(x) => x; }
+*/   /// 01: continued
 
 main() {
-  Expect.equals(5, foo());
+  print(new A()(499));
 }