From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Thu, 21 Dec 2017 17:42:32 +0000 (-0800)
Subject: bpo-26133: Dont unsubscribe signals in UNIX even loop on interpreter shutdown (GH... 
X-Git-Tag: v3.6.5rc1~185
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=3bc68cff5b821e83ee5df8b8cd13f4f54151b406;p=python

bpo-26133: Dont unsubscribe signals in UNIX even loop on interpreter shutdown (GH-4956) (#4962)

(cherry picked from commit 4a02543cf97e8cbf9293741379f977b85531e4c2)
---

diff --git a/Lib/asyncio/unix_events.py b/Lib/asyncio/unix_events.py
index 5ea6c20c67..dde1d3588f 100644
--- a/Lib/asyncio/unix_events.py
+++ b/Lib/asyncio/unix_events.py
@@ -61,8 +61,14 @@ class _UnixSelectorEventLoop(selector_events.BaseSelectorEventLoop):
 
     def close(self):
         super().close()
-        for sig in list(self._signal_handlers):
-            self.remove_signal_handler(sig)
+        if not sys.is_finalizing():
+            for sig in list(self._signal_handlers):
+                self.remove_signal_handler(sig)
+        else:
+            warinigs.warn(f"Closing the loop {self!r} on interpreter shutdown "
+                          f"stage, signal unsubsription is disabled",
+                          ResourceWarning,
+                          source=self)
 
     def _process_self_data(self, data):
         for signum in data:
diff --git a/Misc/NEWS.d/next/Library/2017-12-21-11-08-42.bpo-26133.mt81QV.rst b/Misc/NEWS.d/next/Library/2017-12-21-11-08-42.bpo-26133.mt81QV.rst
new file mode 100644
index 0000000000..0653d1960e
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2017-12-21-11-08-42.bpo-26133.mt81QV.rst
@@ -0,0 +1 @@
+Don't unsubscribe signals in asyncio UNIX event loop on interpreter shutdown.