[issue35219] macOS 10.14 Mojave crashes in multiprocessing

[Barry A. Warsaw]

Barry A. Warsaw <barry at python.org> added the comment:

I'm still testing this solution, but it looks like if you set the environment variable, and then double fork, the granchild won't crash.  Roughly:

os.putenv('OBJC_DISABLE_INITIALIZE_FORK_SAFETY', 'YES')
pid = os.fork()
if pid == 0:
    subpid = os.fork()
    if subpid == 0:
        # I'm in a safe grandchild

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<https://bugs.python.org/issue35219>
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