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LibTest/io/RawDatagramSocket/timeout_A02_t01.dart should be made more robust #170

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mkustermann opened this issue Oct 10, 2018 · 10 comments
Closed

LibTest/io/RawDatagramSocket/timeout_A02_t01.dart should be made more robust #170

mkustermann opened this issue Oct 10, 2018 · 10 comments
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@sgrekhov

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@mkustermann
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The test sometimes fails with:

  FAILED: dartk-vm release_x64 co19_2/LibTest/io/RawDatagramSocket/timeout_A02_t01
  Expected: Pass
  Actual: RuntimeError
  --- Command "vm" (took 01.000002s):
  DART_CONFIGURATION=ReleaseX64 out/ReleaseX64/dart --sync-async --ignore-unrecognized-flags --packages=/b/s/w/ir/.packages /b/s/w/ir/tests/co19_2/src/LibTest/io/RawDatagramSocket/timeout_A02_t01.dart
  exit code:
  255
  stdout:
  unittest-suite-wait-for-done
  stderr:
  Unhandled exception:
  deepEquals([RawSocketEvent.write, RawSocketEvent.read, RawSocketEvent.read, RawSocketEvent.read, RawSocketEvent.closed], [RawSocketEvent.write, RawSocketEvent.read, RawSocketEvent.read, RawSocketEvent.closed], ) fails
     [cause: Expect.equals(expected: <5>, actual: <4>, 'Collections' lengths are not equal: expected length=5, actual length=4') fails.]
  #0      _fail (file:///b/s/w/ir/tests/co19_2/src/Utils/expect.dart:20:5)
  #1      Expect.deepEquals (file:///b/s/w/ir/tests/co19_2/src/Utils/expect_common.dart:375:7)
  #2      Expect.listEquals (file:///b/s/w/ir/tests/co19_2/src/Utils/expect_common.dart:303:5)
  #3      check.<anonymous closure>.<anonymous closure>.<anonymous closure> (file:///b/s/w/ir/tests/co19_2/src/LibTest/io/RawDatagramSocket/timeout_A02_t01.dart:61:16)
...
  #14     _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:172:5)

The test should only increase the sent counter via sent++ if the producer actually has sent something, which requires checking the return value of producer.send().

Ideally the test would listen to the socket events on producer and only send data when getting a write event.
dart-bot pushed a commit to dart-lang/sdk that referenced this issue Oct 10, 2018
@mkustermann
[Gardening] Mark more co19_2 test as always flaky, filed co19 issues
327a1a9 
Issue dart-lang/co19#170
Issue dart-lang/co19#171

Change-Id: Ida6c7c97c43164573e368c96ccc361a311cc7f51
Reviewed-on: https://dart-review.googlesource.com/c/79045
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
Auto-Submit: Martin Kustermann <kustermann@google.com>
@mraleph
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mraleph commented Oct 11, 2018

Same issue with co19_2/LibTest/io/RawDatagramSocket/timeout_A06_t01

I think all tests in RawDatagramSocket category need to be audited and fixed to check the return value from the send method.

dart-bot pushed a commit to dart-lang/sdk that referenced this issue Oct 11, 2018
@mraleph
[gardening] Mark co19 LibTest/io/RawDatagramSocket/timeout_A06_t01 as…
c347850 
… flaky

TBR=kustermann@google.com

Bug: dart-lang/co19#170
Change-Id: I1dd2fb67c4e5574499d5b0e4221c848acd810fe9
Reviewed-on: https://dart-review.googlesource.com/c/79215
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
@mraleph
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mraleph commented Oct 11, 2018

I think RawDatagramSocket/any_A03_t01 is also suffering from the same issue.

dart-bot pushed a commit to dart-lang/sdk that referenced this issue Oct 11, 2018
@mraleph
[gardening] Mark co19 LibTest/io/RawDatagramSocket/any_A03_t01 flaky
1a49337 
TBR=kustermann@google.com

Bug: dart-lang/co19#170
Change-Id: I39a11ec752d49e2e87dbcc8caedbc2851c4e7e8b
Reviewed-on: https://dart-review.googlesource.com/c/79342
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
@sgrekhov
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LibTest/io/RawDatagramSocket/timeout_A06_t01 still failing (sometimes)

@sgrekhov sgrekhov reopened this Oct 18, 2018
@mraleph
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mraleph commented Oct 18, 2018

Similarly any_A01_t02 from the same folder has failed too.

FAILED: dartk-vm release_x64 co19_2/LibTest/io/RawDatagramSocket/any_A01_t02
Expected: Pass
Actual: RuntimeError

--- Command "vm" (took 547ms):
DART_CONFIGURATION=ReleaseX64 out/ReleaseX64/dart --sync-async --ignore-unrecognized-flags --packages=/b/s/w/ir/.packages /b/s/w/ir/tests/co19_2/src/LibTest/io/RawDatagramSocket/any_A01_t02.dart

exit code:
255

stdout:
unittest-suite-wait-for-done

stderr:
Unhandled exception:
Expect.equals(expected: , actual: ) fails.
#0      _fail (file:///b/s/w/ir/tests/co19_2/src/Utils/expect.dart:21:5)
#1      Expect.equals (file:///b/s/w/ir/tests/co19_2/src/Utils/expect_common.dart:30:5)
#2      check... (file:///b/s/w/ir/tests/co19_2/src/LibTest/io/RawDatagramSocket/any_A01_t02.dart:51:16)
#3      _RootZone.runUnary (dart:async/zone.dart:1379:54)
#4      _FutureListener.handleValue (dart:async/future_impl.dart:129:18)
#5      Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:642:45)
#6      Future._propagateToListeners (dart:async/future_impl.dart:671:32)
#7      Future._complete (dart:async/future_impl.dart:476:7)
#8      Stream.any. (dart:async/stream.dart:887:18)
#9      _RootZone.runGuarded (dart:async/zone.dart:1302:10)
#10     _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:389:13)
#11     _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:399:15)
#12     _BufferingStreamSubscription._close (dart:async/stream_impl.dart:283:7)
#13     _SyncStreamController._sendDone (dart:async/stream_controller.dart:771:19)
#14     _StreamController._closeUnchecked (dart:async/stream_controller.dart:628:7)
#15     _StreamController.close (dart:async/stream_controller.dart:621:5)
#16     new _RawDatagramSocket. (dart:io/runtime/binsocket_patch.dart:1816:23)
#17     _NativeSocket.multiplex (dart:io/runtime/binsocket_patch.dart:899:39)
#18     _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)

--- Re-run this test:
python tools/test.py -m release -n dartk-linux-release-x64 co19_2/LibTest/io/RawDatagramSocket/any_A01_t02

I am going to mark the test as flaky again.

dart-bot pushed a commit to dart-lang/sdk that referenced this issue Oct 18, 2018
@mraleph
[gardening] Mark RawDatagramSocket/any_A01_t02 co19 test flaky
4585b8e 
TBR=kustermann@google.com

Bug: dart-lang/co19#170
Change-Id: I55c1fa15c886f9e31203499a3fba8991938ddd36
Reviewed-on: https://dart-review.googlesource.com/c/80665
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
@dcharkes
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Similarly distinct_A01_t05, asBroadcastStream_A01_t02, and timeout_A02_t01 from the same folder also sometimes fail.

I will mark these tests as flaky.

FAILED: dartk-vm debug_ia32 co19_2/LibTest/io/RawDatagramSocket/distinct_A01_t05
Expected: Pass
Actual: RuntimeError

--- Command "vm" (took 06.000112s):
DART_CONFIGURATION=DebugIA32 out/DebugIA32/dart --no-background-compilation --sync-async --ignore-unrecognized-flags --packages=/b/s/w/ir/.packages /b/s/w/ir/tests/co19_2/src/LibTest/io/RawDatagramSocket/distinct_A01_t05.dart

exit code:
255

stdout:
unittest-suite-wait-for-done

stderr:
Unhandled exception:
Expect.equals(expected: <3>, actual: <8>) fails.
#0      _fail (file:///b/s/w/ir/tests/co19_2/src/Utils/expect.dart:21:5)
#1      Expect.equals (file:///b/s/w/ir/tests/co19_2/src/Utils/expect_common.dart:30:5)
#2      main... (file:///b/s/w/ir/tests/co19_2/src/LibTest/io/RawDatagramSocket/distinct_A01_t05.dart:61:16)
#3      _RootZone.runGuarded (dart:async/zone.dart:1302:10)
#4      _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:389:13)
#5      _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:399:15)
#6      _BufferingStreamSubscription._close (dart:async/stream_impl.dart:283:7)
#7      _ForwardingStream._handleDone (dart:async/stream_pipe.dart:106:10)
#8      _ForwardingStreamSubscription._handleDone (dart:async/stream_pipe.dart:172:13)
#9      _RootZone.runGuarded (dart:async/zone.dart:1302:10)
#10     _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:389:13)
#11     _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:399:15)
#12     _BufferingStreamSubscription._close (dart:async/stream_impl.dart:283:7)
#13     _SyncBroadcastStreamController._sendDone. (dart:async/broadcast_stream_controller.dart:401:22)
#14     _BroadcastStreamController._forEachListener (dart:async/broadcast_stream_controller.dart:328:15)
#15     _SyncBroadcastStreamController._sendDone (dart:async/broadcast_stream_controller.dart:400:7)
#16     _BroadcastStreamController.close (dart:async/broadcast_stream_controller.dart:276:5)
#17     _AsBroadcastStreamController.close (dart:async/broadcast_stream_controller.dart:504:27)
#18     _RootZone.runGuarded (dart:async/zone.dart:1302:10)
#19     _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:389:13)
#20     _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:399:15)
#21     _BufferingStreamSubscription._close (dart:async/stream_impl.dart:283:7)
#22     _SyncStreamController._sendDone (dart:async/stream_controller.dart:771:19)
#23     _StreamController._closeUnchecked (dart:async/stream_controller.dart:628:7)
#24     _StreamController.close (dart:async/stream_controller.dart:621:5)
#25     new _RawDatagramSocket. (dart:io/runtime/binsocket_patch.dart:1816:23)
#26     _NativeSocket.multiplex (dart:io/runtime/binsocket_patch.dart:899:39)
#27     _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)

--- Re-run this test:
python tools/test.py -m debug -a ia32 -n dartk-linux-debug-ia32 co19_2/LibTest/io/RawDatagramSocket/distinct_A01_t05
FAILED: dartk-vm debug_ia32 co19_2/LibTest/io/RawDatagramSocket/timeout_A02_t01
Expected: Pass
Actual: RuntimeError

--- Command "vm" (took 08.000650s):
DART_CONFIGURATION=DebugIA32 out/DebugIA32/dart --no-background-compilation --sync-async --ignore-unrecognized-flags --packages=/b/s/w/ir/.packages /b/s/w/ir/tests/co19_2/src/LibTest/io/RawDatagramSocket/timeout_A02_t01.dart

exit code:
255

stdout:
unittest-suite-wait-for-done

stderr:
Unhandled exception:
Expect.isNull(actual: ) fails.
#0      _fail (file:///b/s/w/ir/tests/co19_2/src/Utils/expect.dart:21:5)
#1      Expect.isNull (file:///b/s/w/ir/tests/co19_2/src/Utils/expect_common.dart:57:5)
#2      check... (file:///b/s/w/ir/tests/co19_2/src/LibTest/io/RawDatagramSocket/timeout_A02_t01.dart:65:16)
#3      Timer._createTimer. (dart:async/runtime/libtimer_patch.dart:21:15)
#4      _Timer._runTimers (dart:isolate/runtime/libtimer_impl.dart:382:19)
#5      _Timer._handleMessage (dart:isolate/runtime/libtimer_impl.dart:416:5)
#6      _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)

--- Re-run this test:
python tools/test.py -m debug -a ia32 -n dartk-linux-debug-ia32 co19_2/LibTest/io/RawDatagramSocket/timeout_A02_t01
FAILED: dartk-vm debug_ia32 co19_2/LibTest/io/RawDatagramSocket/asBroadcastStream_A01_t02
Expected: Pass
Actual: Timeout

--- Command "vm" (took 02:00.000218s):
DART_CONFIGURATION=DebugIA32 out/DebugIA32/dart --no-background-compilation --sync-async --ignore-unrecognized-flags --packages=/b/s/w/ir/.packages /b/s/w/ir/tests/co19_2/src/LibTest/io/RawDatagramSocket/asBroadcastStream_A01_t02.dart

exit code:
-15

diagnostics:
Process list including children: [17686]
Trying to capture stack trace for pid 17686
PID 17686 - process
TID 17686:
#0  0xf7764cd9 __kernel_vsyscall
#1  0xf7735d0b pthread_cond_wait@@GLIBC_2.3.2
#2  0x011b12dd dart::Monitor::WaitMicros(long long)
#3  0x011b11f7 dart::Monitor::Wait(long long)
#4  0x014137fd Dart_RunLoop
#5  0x00e5296b dart::bin::RunMainIsolate(char const*, dart::bin::CommandLineOptions*)
#6  0x00e535bf dart::bin::main(int, char**)
#7  0x00e53fa4 main
#8  0xf743eaf3 __libc_start_main
#9  0x00e52021 _start
TID 17687:
#0  0xf7764cd9 __kernel_vsyscall
#1  0xf7513ee6 epoll_wait
#2  0x00e5c3bd dart::bin::EventHandlerImplementation::Poll(unsigned int)
#3  0x00e861f4 dart::bin::ThreadStart(void*)
#4  0xf7731f72 start_thread
#5  0xf751343e __clone

eu-stack: dwfl_thread_getframes tid 17686 at 0xe52020 in /b/s/w/ir/out/DebugIA32/dart: no matching address range


stdout:
unittest-suite-wait-for-done

--- Re-run this test:
python tools/test.py -m debug -a ia32 -n dartk-linux-debug-ia32 co19_2/LibTest/io/RawDatagramSocket/asBroadcastStream_A01_t02

dart-bot pushed a commit to dart-lang/sdk that referenced this issue Oct 19, 2018
@dcharkes
[gardening] Mark various RawDatagramSocket/ tests as flaky
cfbb70a 
Issue: dart-lang/co19#170
Change-Id: Ib0a80d12fab5f968e26a28988ef8d6c0973b48d1
Reviewed-on: https://dart-review.googlesource.com/c/80800
Commit-Queue: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
@mraleph
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mraleph commented Oct 24, 2018

More flakiness, also LibTest/io/RawDatagramSocket/lastWhere_A01_t02.dart

FAILED: dartk-vm product_x64 co19_2/LibTest/io/RawDatagramSocket/lastWhere_A01_t02
Expected: Pass
Actual: RuntimeError

--- Command "vm" (took 751ms):
DART_CONFIGURATION=ProductX64 out/ProductX64/dart --sync-async --ignore-unrecognized-flags --packages=/b/s/w/ir/.packages /b/s/w/ir/tests/co19_2/src/LibTest/io/RawDatagramSocket/lastWhere_A01_t02.dart

exit code:
255

stdout:
unittest-suite-wait-for-done

stderr:
Unhandled exception:
Expect.equals(expected: <4>, actual: <6>) fails.
#0      _fail (file:///b/s/w/ir/tests/co19_2/src/Utils/expect.dart:21:5)
#1      Expect.equals (file:///b/s/w/ir/tests/co19_2/src/Utils/expect_common.dart:30:5)
#2      check.<anonymous closure>.<anonymous closure>.<anonymous closure> (file:///b/s/w/ir/tests/co19_2/src/LibTest/io/RawDatagramSocket/lastWhere_A01_t02.dart:55:16)
#3      _RootZone.runGuarded (dart:async/zone.dart:1302:10)
#4      _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:389:13)
#5      _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:399:15)
#6      _BufferingStreamSubscription._close (dart:async/stream_impl.dart:283:7)
#7      _SyncBroadcastStreamController._sendDone.<anonymous closure> (dart:async/broadcast_stream_controller.dart:401:22)
#8      _BroadcastStreamController._forEachListener (dart:async/broadcast_stream_controller.dart:328:15)
#9      _SyncBroadcastStreamController._sendDone (dart:async/broadcast_stream_controller.dart:400:7)
#10     _BroadcastStreamController.close (dart:async/broadcast_stream_controller.dart:276:5)
#11     _AsBroadcastStreamController.close (dart:async/broadcast_stream_controller.dart:504:27)
#12     _RootZone.runGuarded (dart:async/zone.dart:1302:10)
#13     _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:389:13)
#14     _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:399:15)
#15     _BufferingStreamSubscription._close (dart:async/stream_impl.dart:283:7)
#16     _SyncStreamController._sendDone (dart:async/stream_controller.dart:771:19)
#17     _StreamController._closeUnchecked (dart:async/stream_controller.dart:628:7)
#18     _StreamController.close (dart:async/stream_controller.dart:621:5)
#19     new _RawDatagramSocket.<anonymous closure> (dart:io/runtime/binsocket_patch.dart:1816:23)
#20     _NativeSocket.multiplex (dart:io/runtime/binsocket_patch.dart:899:39)
#21     _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)

--- Re-run this test:
python tools/test.py -m product -n dartk-linux-product-x64 co19_2/LibTest/io/RawDatagramSocket/lastWhere_A01_t02

dart-bot pushed a commit to dart-lang/sdk that referenced this issue Oct 24, 2018
@mraleph
[gardening] Mark co19 LibTest/io/RawDatagramSocket/lastWhere_A01_t02 …
b9999b6 
…flaky

Issue dart-lang/co19#170

TBR=kustermann@google.com

Change-Id: I7f4dbf8127a044e27773cf331c099839638f98ac
Reviewed-on: https://dart-review.googlesource.com/c/81276
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
Commit-Queue: Vyacheslav Egorov <vegorov@google.com>
Auto-Submit: Vyacheslav Egorov <vegorov@google.com>
@mraleph
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mraleph commented Oct 24, 2018

Similarly LibTest/io/RawDatagramSocket/any_A01_t03 is flaking too.

@dcharkes
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FAILED: dartk-vm product_x64 co19_2/LibTest/io/RawDatagramSocket/listen_A02_t02
Expected: Pass
Actual: RuntimeError

--- Command "vm" (took 818ms):
DART_CONFIGURATION=ProductX64 xcodebuild/ProductX64/dart --sync-async --ignore-unrecognized-flags --packages=/b/s/w/ir/.packages /b/s/w/ir/tests/co19_2/src/LibTest/io/RawDatagramSocket/listen_A02_t02.dart

exit code:
255

stdout:
unittest-suite-wait-for-done

stderr:
Unhandled exception:
deepEquals([0, 1, 2], [0, null, null], ) fails
   [cause: Expect.equals(expected: <1>, actual: <null>) fails.]
#0      _fail (file:///b/s/w/ir/tests/co19_2/src/Utils/expect.dart:21:5)
#1      Expect.deepEquals (file:///b/s/w/ir/tests/co19_2/src/Utils/expect_common.dart:375:7)
#2      Expect.listEquals (file:///b/s/w/ir/tests/co19_2/src/Utils/expect_common.dart:303:5)
#3      check.<anonymous closure>.<anonymous closure>.<anonymous closure> (file:///b/s/w/ir/tests/co19_2/src/LibTest/io/RawDatagramSocket/listen_A02_t02.dart:60:16)
#4      _RootZone.runGuarded (dart:async/zone.dart:1302:10)
#5      _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:389:13)
#6      _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:399:15)
#7      _BufferingStreamSubscription._close (dart:async/stream_impl.dart:283:7)
#8      _SyncStreamController._sendDone (dart:async/stream_controller.dart:771:19)
#9      _StreamController._closeUnchecked (dart:async/stream_controller.dart:628:7)
#10     _StreamController.close (dart:async/stream_controller.dart:621:5)
#11     new _RawDatagramSocket.<anonymous closure> (dart:io/runtime/binsocket_patch.dart:1816:23)
#12     _NativeSocket.multiplex (dart:io/runtime/binsocket_patch.dart:899:39)
#13     _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)

--- Re-run this test:
python tools/test.py -m product -n dartk-mac-product-x64 co19_2/LibTest/io/RawDatagramSocket/listen_A02_t02

This test also does not check the return value of send().

dart-bot pushed a commit to dart-lang/sdk that referenced this issue Oct 31, 2018
@dcharkes
[gardening] mark another co19 RawDatagramSocket test as flaky
2419031 
Issue: dart-lang/co19#170
Change-Id: I4224d9d9796b94f9ee8485171fd0be4791d6d80a
Reviewed-on: https://dart-review.googlesource.com/c/82206
Auto-Submit: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
@sgrekhov sgrekhov self-assigned this Nov 1, 2018
@sjindel-google
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Ditto for RawDatagramSocket/receive_A01_t01:

FAILED: dartk-vm release_x64 co19_2/LibTest/io/RawDatagramSocket/receive_A01_t01
Expected: Pass
Actual: RuntimeError

--- Command "vm" (took 397ms):
DART_CONFIGURATION=ReleaseX64 xcodebuild/ReleaseX64/dart --sync-async --ignore-unrecognized-flags --packages=/b/s/w/ir/.packages /b/s/w/ir/tests/co19_2/src/LibTest/io/RawDatagramSocket/receive_A01_t01.dart

exit code:
255

stdout:
unittest-suite-wait-for-done

stderr:
Unhandled exception:
Expect.equals(expected: <2>, actual: <1>) fails.
#0      _fail (file:///b/s/w/ir/tests/co19_2/src/Utils/expect.dart:21:5)
#1      Expect.equals (file:///b/s/w/ir/tests/co19_2/src/Utils/expect_common.dart:30:5)
#2      check.<anonymous closure>.<anonymous closure>.<anonymous closure> (file:///b/s/w/ir/tests/co19_2/src/LibTest/io/RawDatagramSocket/receive_A01_t01.dart:47:18)
#3      _RootZone.runUnaryGuarded (dart:async/zone.dart:1314:10)
#4      _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#5      _BufferingStreamSubscription._add (dart:async/stream_impl.dart:263:7)
#6      _SyncStreamController._sendData (dart:async/stream_controller.dart:764:19)
#7      _StreamController._add (dart:async/stream_controller.dart:640:7)
#8      _StreamController.add (dart:async/stream_controller.dart:586:5)
#9      new _RawDatagramSocket.<anonymous closure> (dart:io/runtime/binsocket_patch.dart:1807:33)
#10     _NativeSocket.issueReadEvent.issue (dart:io/runtime/binsocket_patch.dart:826:14)
#11     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#12     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#13     _runPendingImmediateCallback (dart:isolate/runtime/libisolate_patch.dart:115:13)
#14     _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:172:5)

--- Re-run this test:
python tools/test.py -m release -n dartk-mac-release-x64 co19_2/LibTest/io/RawDatagramSocket/receive_A01_t01

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This is a part of #195. Closed. Will be fixed as part of #195

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