Seen here: http://chromegw.corp.google.com/i/client.dart/builders/pub-win-be/builds/3086/steps/pub%20tests/logs/stdio

FAILED: none-vm-checked release_ia32 pub/test/serve/missing_file_test
Expected: Pass
Actual: RuntimeError
CommandOutput[vm]:

stdout:
unittest-suite-wait-for-done
FAIL: responds with a 404 for missing source files
  Caught The schedule had 1 errors:
  ScheduleError:
  | FileSystemException: Cannot delete file, path = 'C:\Users\CHROME2\AppData\Local\Temp\pub_70e159bf-7e8f-11e3-adfc-005056030208\myapp\lib\nope.dart' (OS Error: The process cannot access the file because it is being used by another process.
  
  | , errno = 32)
  
  Stack chain:
  | file_impl.dart 558 _File.throwIfError
  | file_impl.dart 306 _File.deleteSync
  | file_system_entity.dart 348 FileSystemEntity.deleteSync
  | sdk\lib_internal\pub\lib\src\io.dart 306:30 deleteEntry
  | sdk\lib_internal\pub\test\serve\missing_file_test.dart 38:18 main.<fn>.<fn>
  | dart:async Future.Future.sync
  | package:scheduled_test/src/utils.dart 110:50 syncFuture
  | package:scheduled_test/src/schedule.dart 429:24 TaskQueue.schedule.<fn>
  | package:scheduled_test/src/task.dart 81:53 Task.Task..<fn>.<fn>
  | dart:isolate _RawReceivePortImpl.handleMessage
  | ===== asynchronous gap ===========================
  | package:scheduled_test/src/utils.dart 110:45 syncFuture
  | package:scheduled_test/src/schedule.dart 429:24 TaskQueue.schedule.<fn>
  | package:scheduled_test/src/task.dart 81:53 Task.Task..<fn>.<fn>
  | dart:isolate _RawReceivePortImpl._handleMessage
  | ===== asynchronous gap ===========================
  | dart:async Future.then
  | package:scheduled_test/src/task.dart 81:43 Task.Task..<fn>
  | package:scheduled_test/src/schedule.dart 446:49 TaskQueue._run.<fn>
  | dart:isolate _RawReceivePortImpl._handleMessage
  | ===== asynchronous gap ===========================
  | dart:async Future.forEach
  | package:scheduled_test/src/schedule.dart 441:26 TaskQueue._run
  | package:scheduled_test/src/schedule.dart 136:24 Schedule.run.<fn>
  | dart:isolate _RawReceivePortImpl._handleMessage
  | ===== asynchronous gap ===========================
  | dart:async _Future.then
  | package:scheduled_test/src/schedule.dart 125:35 Schedule.run
  | package:scheduled_test/scheduled_test.dart 238:33 _test.<fn>.<fn>
  | package:stack_trace/src/chain.dart 85:20 Chain.capture
  | package:scheduled_test/scheduled_test.dart 236:18 _test.<fn>
  | package:unittest/src/test_case.dart 109:30 _run.<fn>
  | dart:isolate _RawReceivePortImpl.handleMessage
  
  Error detected during task in queue "tasks":
  * creating directory:
  | myapp
  | |-- async descriptor
  | |-- asset
  | | '-- nope.png
  | |-- lib
  | | '-- nope.dart
  | '-- web
  | '-- index.html
  * starting process 'pub serve'
  * reading the next stdout line from process 'pub serve'
  > delete files
  |
  | Stack chain:
  | | package:scheduled_test/src/task.dart 74:26 Task.Task.
  | | package:scheduled_test/src/task.dart 67:7 Task.Task
  | | package:scheduled_test/src/schedule.dart 428:20 TaskQueue.schedule
  | | package:scheduled_test/scheduled_test.dart 291:33 schedule
  | | sdk\lib_internal\pub\test\serve\missing_file_test.dart 36:13 main.<fn>
  | | sdk\lib_internal\pub\test\test_pub.dart 350:9 _integration.<fn>
  | | package:scheduled_test/scheduled_test.dart 240:13 _test.<fn>.<fn>.<fn>
  | | package:scheduled_test/src/schedule.dart 127:14 Schedule.run.<fn>
  | | dart:isolate _RawReceivePortImpl._handleMessage
  | | ===== asynchronous gap ===========================
  | | dart:async _Future.then
  | | package:scheduled_test/src/schedule.dart 125:35 Schedule.run
  | | package:scheduled_test/scheduled_test.dart 238:33 _test.<fn>.<fn>
  | | package:stack_trace/src/chain.dart 85:20 Chain.capture
  | | package:scheduled_test/scheduled_test.dart 236:18 _test.<fn>
  | | package:unittest/src/test_case.dart 109:30 _run.<fn>
  | | dart:isolate _RawReceivePortImpl._handleMessage
  * request index.html
  * request packages/myapp/nope.dart
  * request assets/myapp/nope.png
  * request dir/packages/myapp/nope.dart
  * request dir/assets/myapp/nope.png
  * waiting for process 'pub serve' to die
  ================================================================================
  
  Debug info:
  Results of running 'pub serve':
  Process was killed prematurely.
  Standard output:
  | MSG : Serving myapp on http://127.0.0.1:52928
  Standard error:
  | FINE: Pub 0.1.2+3
  | IO : Spawning cmd /c ver
  | IO : Finished ver. Exit code 0.stdout:Microsoft Windows [Version 6.1.7601]Nothing output on stderr.
  | IO : Listing directory C:\Users\CHROME2\AppData\Local\Temp\pub_70e159bf-7e8f-11e3-adfc-005056030208\myapp\web.
  | FINE: Listed directory C:\Users\CHROME2\AppData\Local\Temp\pub_70e159bf-7e8f-11e3-adfc-005056030208\myapp\web:
  | | C:\Users\CHROME2\AppData\Local\Temp\pub_70e159bf-7e8f-11e3-adfc-005056030208\myapp\web\index.html
  | IO : Listing directory C:\Users\CHROME~2\AppData\Local\Temp\pub_70e159bf-7e8f-11e3-adfc-005056030208\myapp\asset.

0 PASSED, 1 FAILED, 0 ERRORS

stderr:
Unhandled exception:
Exception: Some tests failed.

­0 SimpleConfiguration.onDone (package:unittest/src/simple_configuration.dart:209:9)

­1 _completeTests (package:unittest/unittest.dart:782:17)

­2 _runTest (package:unittest/unittest.dart:737:19)

­3 _nextTestCase (package:unittest/unittest.dart:644:11)

­4 _asyncRunCallback (dart:async/schedule_microtask.dart:18)

­5 _asyncRunCallback (dart:async/schedule_microtask.dart:21)

­6 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:119)

Command[vm]: build\ReleaseIA32\dart-sdk\bin\dart.exe --ignore-unrecognized-flags --enable_asserts --enable_type_checks --package-root=build/ReleaseIA32/packages/ E:\b\build\slave\pub-win-be\build\dart\sdk\lib_internal\pub\test\serve\missing_file_test.dart
Took 0:00:03.229000