[issue19989] Error while sending function code over queue (multiprocessing)

[Filip Malczak]

New submission from Filip Malczak:

Ive been using YAPSY to load plugins in one process. In this process I tried to put them in queue, and in another process I read them from queue.

There was a problem with non-existing type of plugin in consumer process, so I tried to serialize plugin instance by hand and deserialize by hand in consumer.

Both processes were created and started from main process, which passed them both the same queue.

Law forbids me from showing the whole code, but I'm attaching file with code pieces that generate error below:

Process ConsumerProcess-2:
Traceback (most recent call last):
  File "/usr/lib/python3.3/multiprocessing/process.py", line 258, in _bootstrap
    self.run()
  File "/usr/lib/python3.3/multiprocessing/process.py", line 95, in run
    self._target(*self._args, **self._kwargs)
  File "/<private_path>/consumer_stub.py", line 27, in _consumer
    result = foo()
  File "/<private_path>/loader_process.py", line 90, in x
    val = (kind, plugin, meta)
SystemError: ../Objects/cellobject.c:24: bad argument to internal function

----------
components: Build
files: pythonbug.txt
messages: 206239
nosy: Filip.Malczak
priority: normal
severity: normal
status: open
title: Error while sending function code over queue (multiprocessing)
type: crash
versions: Python 3.3
Added file: http://bugs.python.org/file33149/pythonbug.txt

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19989>
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