Ross Lagerwall added the comment: It's caused by the following check in _posixsubprocess.c: if (close_fds && errpipe_write < 3) { /* precondition */ PyErr_SetString(PyExc_ValueError, "errpipe_write must be >= 3"); return NULL; }
which was written by Gregory P. Smith in 2010 (adding to nosy list). I'm not entirely sure why this check is here, presumably its due to the way close_fds=True is handled. The close fds logic is also hardcoded to close fds from 3 upwards,. ---------- nosy: +gregory.p.smith _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue15798> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com