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Misc/NEWS.d/next/Library/2024-09-19-00-09-48.gh-issue-84559.IrxvQe.rst

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+The default :mod:`multiprocessing` start method on Linux and other POSIX systems has been changed away from often unsafe``"fork"`` to ``"forkserver"`` (when the platform support sending file handles over pipes) or ``"spawn"``. Mac and Windows are unchanged as they already default to ``"spawn"``.