Martin Panter added the comment: I think I figured out the problem. The signal module has a “main_pid” variable which it checks inside the low-level handler: <https://hg.python.org/cpython/file/v3.5.1/Modules/signalmodule.c#l300>. It looks like main_pid gets updated inside PyOS_AfterFork(), but I guess there is a race with a signal being received before main_pid is updated.
Maybe there should be some signal masking/blocking or something in the critical section between fork() and PyOS_AfterFork()? ---------- versions: -Python 3.4 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue25666> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
