| Index: sdk/lib/io/http_impl.dart | 
| diff --git a/sdk/lib/io/http_impl.dart b/sdk/lib/io/http_impl.dart | 
| index a8bca7127da6b350b3380149f63f29b3136b7816..aa7de54a4f56fa14a9b964478c46838de0f0e14f 100644 | 
| --- a/sdk/lib/io/http_impl.dart | 
| +++ b/sdk/lib/io/http_impl.dart | 
| @@ -951,7 +951,7 @@ class _ChunkedTransformer extends StreamEventTransformer<List<int>, List<int>> { | 
| header.add(hexDigits[length]); | 
| } else { | 
| while (length > 0) { | 
| -        header.insertRange(0, 1, hexDigits[length % 16]); | 
| +        header.insert(0, hexDigits[length % 16]); | 
| length = length >> 4; | 
| } | 
| } | 
|  |