[issue7544] multiprocessing.Pool(): Fatal Python error: PyEval_AcquireThread: NULL new thread state

[STINNER Victor]

New submission from STINNER Victor <victor.stinner at haypocalc.com>:

Using my fuzzer (Fusil) on Python trunk, I got sometimes errors on
multiprocessing.Pool():

   Fatal Python error: PyEval_AcquireThread: NULL new thread state

I'm sorry but I don't have example script to reproduce the bug. I
suppose that the error depends on the system load. I have the error on
an Intel Core2 Quad Core Q9300 (CPU able to run 4 processes/threads at
the time same).

How can I get more information on the bug? How can I reproduce it?

----------
components: Extension Modules
messages: 96602
nosy: haypo
severity: normal
status: open
title: multiprocessing.Pool(): Fatal Python error: PyEval_AcquireThread: NULL new thread state
type: crash
versions: Python 2.7

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue7544>
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