Check constness of default args

tests/language/src/ConstOptionalArgsNegativeTest.dart

Index: tests/language/src/ConstOptionalArgsNegativeTest.dart
diff --git a/tests/language/src/ConstOptionalArgsNegativeTest.dart b/tests/language/src/ConstOptionalArgsNegativeTest.dart
new file mode 100644
index 0000000000000000000000000000000000000000..7d5d57e84e4ae02130e66541ae9d43e56574db73
--- /dev/null
+++ b/tests/language/src/ConstOptionalArgsNegativeTest.dart
@@ -0,0 +1,12 @@
+// Copyright (c) 2011, 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.
+// Check that const objects (including literals) are immutable.
+
+// should be 'const {}'

[jimhug, 2011/12/06 16:23:39]

Thanks for including a test with your fix!

+invalid([var p = {}]) {
+}
+
+main() {
+  invalid();
+}