bpo-26133: Dont unsubscribe signals in UNIX even loop on interpreter …

…shutdown (GH-4956) (#4962) (cherry picked from commit 4a02543)
python · Dec 21, 2017 · 3bc68cf · 3bc68cf
1 parent fdb148f
commit 3bc68cf
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Showing 2 changed files with 9 additions and 2 deletions.
diff --git a/Lib/asyncio/unix_events.py b/Lib/asyncio/unix_events.py
@@ -61,8 +61,14 @@ def _socketpair(self):
 
     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
@@ -0,0 +1 @@
+Don't unsubscribe signals in asyncio UNIX event loop on interpreter shutdown.