[issue10886] Unhelpful backtrace for multiprocessing.Queue

[sbt]

sbt <shibturn at gmail.com> added the comment:

mp_queue_pickle_in_main_thread.patch (against the default branch) fixes the problem by doing the pickling in Queue.put().  It is version of a patch for Issue 8037 (although I believe the behaviour complained about in Issue 8037 is not an actual bug).

The patch also has the advantage of ensuring that weakref callbacks and 
__del__ methods for objects put in the queue will not be run in the 
background thread.  (Bytes objects have trivial destructors.)  This 
potentially prevents inconsistent state caused by forking a process 
while the background thread is running -- see Issue 6721.

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keywords: +patch
nosy: +sbt
versions: +Python 2.7, Python 3.1, Python 3.2, Python 3.3, Python 3.4
Added file: http://bugs.python.org/file23062/mp_queue_pickle_in_main_thread.patch

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<http://bugs.python.org/issue10886>
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