Nick Coghlan added the comment: I've added Greg to the nosy list and filed an issue with subprocess32 about this: https://github.com/google/python-subprocess32/issues/30 I did that mainly to make sure they don't inadvertently backport this regression, but also to ask if subprocess32 might potentially provide a way to get the old intended-but-not-actually-tested behaviour back in 3.x. ---------- nosy: +gregory.p.smith _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue22635> _______________________________________