Fix bad mangling of environment parameters.

tests/language/state_mangling3_test.dart

Index: tests/language/state_mangling3_test.dart
diff --git a/tests/language/state_mangling_test.dart b/tests/language/state_mangling3_test.dart
similarity index 73%
copy from tests/language/state_mangling_test.dart
copy to tests/language/state_mangling3_test.dart
index 02df690ca51e966dc7f9395ebc47a5417bbbe578..195a2dd298066adc6bcf60a7e7cb641f475a60a1 100644
--- a/tests/language/state_mangling_test.dart
+++ b/tests/language/state_mangling3_test.dart
@@ -2,15 +2,15 @@
 // 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.
 
-foo(state) {
-  if (state == null) return 0;
+foo(state0) {
+  if (state0 == null) return 0;
   var sum = 0;
-  for (int i = 0; i < state.length; i++) {
-    sum += state[i];
+  for (int i = 0; i < state0.length; i++) {
+    sum += state0[i];
   }
-  state = inscrutableId(state);
-  for (int i = 0; i < state.length; i++) {
-    sum += state[i];
+  state0 = inscrutableId(state0);
+  for (int i = 0; i < state0.length; i++) {
+    sum += state0[i];
   }
   return sum;
 }