Refactor List.setRange function.

runtime/bin/process_patch.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.
 
 patch class _WindowsCodePageDecoder {
   /* patch */ static String _decodeBytes(List<int> bytes)
       native "SystemEncodingToString";
 }
 
 
@@ skipping 181 matching lines @@
           return (negative == 0) ? code : -code;
         }
 
         void handleExit() {
           _ended = true;
           _exitCode.complete(exitCode(exitDataBuffer));
           // Kill stdin, helping hand if the user forgot to do it.
           _stdin._sink.destroy();
         }
 
-        exitDataBuffer.setRange(exitDataRead, data.length, data);
+        exitDataBuffer.setRange(exitDataRead, exitDataRead + data.length, data);
         exitDataRead += data.length;
         if (exitDataRead == EXIT_DATA_SIZE) {
           handleExit();
         }
       });
 
       completer.complete(this);
     });
     return completer.future;
   }
@@ skipping 111 matching lines @@
 
 class _ProcessResult implements ProcessResult {
   const _ProcessResult(int this.exitCode,
                        String this.stdout,
                        String this.stderr);
 
   final int exitCode;
   final String stdout;
   final String stderr;
 }