SocketException: Write failed (OS Error: The operation completed successfully.

[Henri Chen]

Dart Experts, 

Do you have idea what this Exception really means.

Unhandled exception:

SocketException: Write failed (OS Error: The operation completed successfully.

, errno = 0)

#0      _DefaultZone.handleUncaughtError.<anonymous closure> (dart:async/zone.dart:148:7)

#1      _asyncRunCallback._asyncRunCallback (dart:async/event_loop.dart:9:15)

#2      _asyncRunCallback._asyncRunCallback (dart:async/event_loop.dart:13:7)

#3      _createTimer.<anonymous closure> (dart:async-patch/timer_patch.dart:8:13)

#4      _Timer._createTimerHandler._handleTimeout (timer_impl.dart:91:28)

#5      _Timer._createTimerHandler._handleTimeout (timer_impl.dart:99:7)

#6      _Timer._createTimerHandler.<anonymous closure> (timer_impl.dart:107:23)

#7      _ReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:81:92)

It sometimes(not always) happens when I do Socket.add(). The message of the exception is kind of "inconsistent" because it says 

"The operation completed successfully.

, errno = 0)"

My program runs on Dart VM(Dart SDK version 0.5.20.4_r24275);  Win7 64 bits. Any insider knows what this exception really is about?

Henri

http://www.rikulo.org

[Iván Zaera Avellón]

I'm not a Dart expert, but it looks like a bug. See this thread in stack overflow:

http://stackoverflow.com/questions/7665384/createfile-returns-invalid-handle-value-but-getlasterror-is-error-success

You can get an ERROR_SUCCESS (=0) when calling GetLastError() in Windows if you do some operations between the failure and the GetLastError() call.

Just a hint for the Dart expert ;-).

2013/7/2 Henri Chen <henr...@rikulo.org>

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[Anders Johnsen]

Hi Henri and Iván,

I actually landed a fix for this yesterday, so that we return the correct error code. Iván, you are right, we did indeed perform another call before extracting the error code.

The fix was landed in https://code.google.com/p/dart/source/detail?r=24623

Cheers,

- Anders