From 331966be70c371b268a4fcce9e97280cd869f137 Mon Sep 17 00:00:00 2001
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From: Jakub Kulik <kulikjak@gmail.com>
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Date: Mon, 15 Mar 2021 08:49:28 +0100
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Subject: [PATCH] Fix dictionary iteration error in _ExecutorManagerThread
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[Thomas: Taken from upstream pull request
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https://github.com/python/cpython/pull/24868, which is aimed at fixing
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https://bugs.python.org/issue43498]
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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---
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Lib/concurrent/futures/process.py | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/Lib/concurrent/futures/process.py b/Lib/concurrent/futures/process.py
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index 90bc98bf2ec..e3b36dff572 100644
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--- a/Lib/concurrent/futures/process.py
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+++ b/Lib/concurrent/futures/process.py
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@@ -373,7 +373,7 @@ class _ExecutorManagerThread(threading.Thread):
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assert not self.thread_wakeup._closed
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wakeup_reader = self.thread_wakeup._reader
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readers = [result_reader, wakeup_reader]
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- worker_sentinels = [p.sentinel for p in self.processes.values()]
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+ worker_sentinels = [p.sentinel for p in self.processes.copy().values()]
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ready = mp.connection.wait(readers + worker_sentinels)
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cause = None
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--
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2.31.1
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