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

sdk/lib/io/string_transformer.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.
 
 part of dart.io;
 
 /**
  * String encodings.
  */
 class Encoding {
@@ skipping 202 matching lines @@
 }
 
 
 abstract class _SingleByteDecoder
     extends StreamEventTransformer<List<int>, String> {
   final int _replacementChar;
 
   _SingleByteDecoder(this._replacementChar);
 
   void handleData(List<int> data, StreamSink<String> sink) {
-    var buffer = new List<int>.fixedLength(data.length);
+    var buffer = new List<int>(data.length);
     for (int i = 0; i < data.length; i++) {
       int char = _decodeByte(data[i]);
       if (char < 0) char = _replacementChar;
       buffer[i] = char;
     }
     sink.add(new String.fromCharCodes(buffer));
   }
 
   int _decodeByte(int byte);
 }
@@ skipping 72 matching lines @@
 
 // Utility class for decoding Windows current code page data delivered
 // as a stream of bytes.
 class _WindowsCodePageDecoder extends StreamEventTransformer<List<int>, String> {
   void handleData(List<int> data, StreamSink<String> sink) {
     sink.add(_decodeBytes(data));
   }
 
   external static String _decodeBytes(List<int> bytes);
 }