Fix two bugs in the Dart VM's super-noSuchMethod invocation.

tests/language/super_operator_index8_test.dart

+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// 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.
+
+// Test for unresolved super[] and super[]= and correct evaluation order.
+
+import "package:expect/expect.dart";
+
+class A {
+  var indexField = new List(2);
+
+  noSuchMethod(Invocation im) {
+    if (im.memberName == const Symbol('[]=')) {
+      Expect.equals(2, im.positionalArguments.length);
+      indexField[im.positionalArguments[0]] = im.positionalArguments[1];
+    } else if (im.memberName == const Symbol('[]')) {
+      Expect.equals(1, im.positionalArguments.length);
+      return indexField[im.positionalArguments[0]];
+    } else {
+      Expect.fail('Should not reach here');
+    }
+  }
+}
+
+var global = 0;
+
+f() {
+  Expect.equals(0, global++);
+  return 0;
+}
+
+g() {
+  Expect.equals(1, global++);
+  return 42;
+}
+
+class B extends A {
+  test() {
+    Expect.equals(42, super[f()] = g());
+    Expect.equals(2, global);
+  }
+}
+
+main() {
+  new B().test();
+}