Change new List(n) to return fixed length list.

pkg/serialization/lib/src/basic_rule.dart

Index: pkg/serialization/lib/src/basic_rule.dart
diff --git a/pkg/serialization/lib/src/basic_rule.dart b/pkg/serialization/lib/src/basic_rule.dart
index 19a8bcab3c63f059edae35a827df76855c1c1d04..a4c7fd8f08563c66444bdab424a7faa7a50c77bf 100644
--- a/pkg/serialization/lib/src/basic_rule.dart
+++ b/pkg/serialization/lib/src/basic_rule.dart
@@ -130,12 +130,16 @@ class BasicRule extends SerializationRule {
     useMaps = false;
   }
 
-  /** Create either a list or a map to hold the object's state, depending
+  /**
+   * Create either a list or a map to hold the object's state, depending
    * on the [useMaps] variable. If using a Map, we wrap it in order to keep
    * the protocol compatible. See [configureForLists]/[configureForMaps].
+   *
+   * The list need to be growable for SimpleJson format to work.

[floitsch, 2013/02/26 13:54:19]

If a list is returned, it is growable.

    */
    createStateHolder() =>
-     useMaps ? new _MapWrapper(fields.contents) : new List(fields.length);
+     useMaps ? new _MapWrapper(fields.contents)

[floitsch, 2013/02/26 13:54:19]

I would prefer an 'if', and the length-assignment in a separate statement.

+             : (new List()..length = fields.length);
 
   /**
    * Wrap the state if it's passed in as a map, and if the keys are references,