[issue18520] Fixes bugs found by pyfailmalloc during Python initialization

[STINNER Victor]

New submission from STINNER Victor:

I'm working on a version of pyfailmalloc integrated into CPython to inject memory allocation failures duging Python startup. As expected, I found new bugs.

I create this issue to track these bugs and their fix, as I did with the issue #18408.

Home page of the project:
https://pypi.python.org/pypi/pyfailmalloc

----------
messages: 193439
nosy: haypo
priority: normal
severity: normal
status: open
title: Fixes bugs found by pyfailmalloc during Python initialization
versions: Python 3.4

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18520>
_______________________________________