Comments (6)
Interestingly, using python instead of ipython doesn't trigger the crash.
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Also printing the PIDs:
Main Process PID: 2688
Subprocess PID: 2691
objc[2691]: +[NSString initialize] may have been in progress in another thread when fork() was called.
objc[2691]: +[NSString initialize] may have been in progress in another thread when fork() was called. We cannot safely call it or ignore it in the fork() child process. Crashing instead. Set a breakpoint on objc_initializeAfterForkError to debug.
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https://stackoverflow.com/questions/50168647/multiprocessing-causes-python-to-crash-and-gives-an-error-may-have-been-in-progr:
This solves it:
export OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES
ipython crash.py
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Maybe relevant https://github.com/python/cpython/pull/13849/files
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I think this is the relevant issue https://bugs.python.org/issue33725
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I am closing this as this is a python bug and not appnope related. I suspect that any objc code called in a subprocess will create the same issue.
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Related Issues (11)
- The `_nope.py` file is missing? HOT 2
- ModuleNotFoundError: No module named 'appnope' HOT 12
- Regarding of Jupyter lab HOT 12
- distutils Version classes are deprecated HOT 2
- No module named appnope HOT 9
- Bug in regex? HOT 3
- Installation (via Pip) does not work for Python3 HOT 2
- AppNap not being disabled HOT 4
- Add support for preventing system sleep
- [Help Wanted] AppNap issue still appears in Homebrew IPython 7.15.0 HOT 5
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