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bpo-37380: subprocess: don't use _active on win (pythonGH-14360)
As noted by @eryksun in [1] and [2], using _cleanup and _active(in __del__) is not necessary on Windows, since: > Unlike Unix, a process in Windows doesn't have to be waited on by > its parent to avoid a zombie. Keeping the handle open will actually > create a zombie until the next _cleanup() call, which may be never > if Popen() isn't called again. This patch simply defines `subprocess._active` as `None`, for which we already have the proper logic in place in `subprocess.Popen.__del__`, that prevents it from trying to append the process to the `_active`. This patch also defines `subprocess._cleanup` as a noop for Windows. [1] https://bugs.python.org/issue37380#msg346333 [2] https://bugs.python.org/issue36067#msg336262 Signed-off-by: Ruslan Kuprieiev <ruslan@iterative.ai>
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Misc/NEWS.d/next/Windows/2019-06-25-04-15-22.bpo-37380.tPxjuz.rst
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Don't collect unfinished processes with ``subprocess._active`` on Windows to | ||
cleanup later. Patch by Ruslan Kuprieiev. |