[New-bugs-announce] [issue16392] frozen importlib crashes on circular imports in ext modules

[Stefan Behnel]

New submission from Stefan Behnel:

After compiling the stdlib with Cython with the attached script, modules that use circular imports fail to initialise. That includes os and posixpath, as well as shutil and tarfile. Example:

$ ./python -c 'import shutil'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "tarfile.py", line 44, in init tarfile (tarfile.c:44135)
    import shutil
  File "shutil.py", line 14, in init shutil (shutil.c:22497)
    import tarfile
  File "<frozen importlib._bootstrap>", line 1556, in _find_and_load
RuntimeError: maximum recursion depth exceeded

I've tried this with the latest CPython 3.4 hg version, but I'm pretty sure it fails in Py3.3 as well.

----------
components: Interpreter Core
files: cystdlib.py
messages: 174612
nosy: scoder
priority: normal
severity: normal
status: open
title: frozen importlib crashes on circular imports in ext modules
type: behavior
versions: Python 3.4
Added file: http://bugs.python.org/file27851/cystdlib.py

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16392>
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