Crash in PyCharm

Following code will crash with Python3 on PyCharm.

import locale
import logging
import logging.handlers

locale.setlocale(locale.LC_ALL, 'de_CH.UTF-8')

stream_handler = logging.StreamHandler()
stream_handler.setFormatter(logging.Formatter('%(asctime)s - %(levelname)s - %(message)s'))

logger = logging.getLogger(__name__)
logger.addHandler(stream_handler)
logger.error('testing')

The code should print testing.

PyCharm will crash and print the exit code:

Python crashes with 'Process finished with exit code -1073740940 (0xC0000374)'

Tested under Windows 10 - 10.0.17134 Build 17134, Python 3.6.3.

Crash on Windows Cmd

I've also tested it under Windows CMD with:

c:\Python361\python.exe -c "import locale; import logging; import logging.handlers; locale.setlocale(locale.LC_ALL, 'de_CH.UTF-8'); stream_handler = logging.StreamHandler(); stream_handler.setFormatter(logging.Formatter('%(asctime)s - %(levelname)s - %(message)s')); logger = logging.getLogger(__name__); logger.addHandler(stream_handler); logger.error('testing')"

Which should print testing but ends without any output. I have also test it with Python 3.7.3 on the Windows CMD with the same result.

Crash on Python IDLE

I've also tested the code with Python 3.6.1 on IDLE:

import locale; import logging; import logging.handlers; locale.setlocale(locale.LC_ALL, 'de_CH.UTF-8'); stream_handler = logging.StreamHandler(); stream_handler.setFormatter(logging.Formatter('%(asctime)s - %(levelname)s - %(message)s')); logger = logging.getLogger(__name__); logger.addHandler(stream_handler); logger.error('testing')

Which prints

'de_CH.UTF-8'

=============================== RESTART: Shell ===============================

I've found a solution following the python issue page here

https://bugs.python.org/issue36792#msg342966

Changing

locale.setlocale(locale.LC_ALL, 'de_CH.UTF-8')

to

locale.setlocale(locale.LC_ALL, 'de-CH')

solves the problem.