Make servePackages's contents argument saner.

pkg/scheduled_test/lib/scheduled_process.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.
 
 library scheduled_test.scheduled_process;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
@@ skipping 186 matching lines @@
       currentSchedule.heartbeat();
       return chunk;
     })
         .transform(_encoding.decoder)
         .transform(new LineSplitter()));
   }
 
   /// Schedule an exception handler that will clean up the process and provide
   /// debug information if an error occurs.
   void _scheduleExceptionCleanup() {
+    if (description == "pub get") return;

[Bob Nystrom, 2014/08/20 23:50:23]

You should check this in and immediately wipe it from your memory. Months from
now, this behavior will confuse the hell out of us!

     currentSchedule.onException.schedule(() {
       _stdoutCanceller();
       _stderrCanceller();
 
       if (!_process.hasValue) return null;
 
       var killedPrematurely = false;
       if (!_exitCode.hasValue) {
         killedPrematurely = true;
         _process.value.kill(ProcessSignal.SIGKILL);
@@ skipping 99 matching lines @@
     schedule(() {
       return _exitCode.then((exitCode) {
         if (expectedExitCode != null) {
           expect(exitCode, equals(expectedExitCode));
         }
       });
     }, "waiting for process '$description' to exit");
     _scheduledExitTask = currentSchedule.tasks.contents.last;
   }
 }