As a process comment: I agree with what Victor wrote in http://haypo-notes.readthedocs.io/pep_random.html#status-of-python-3-5-2, when he suggests that we leave 3.5.2 as is for now (i.e. reverted to be consistent with 2.7 and 3.4, which favours a risk of subtle security failures in some situations over a certainty of Python failing to start in those same situations), and only reconsider what to do for 3.5.x and 2.7.x after we have agreed on an acceptable solution for 3.6.