[3.6] bpo-31234, socket.create_connection(): Fix ref cycle (GH-3546) (#3552)

(cherry picked from commit acb9fa79)

[3.6] bpo-31234, socket.create_connection(): Fix ref cycle (GH-3546) (#3552)
(cherry picked from commit acb9fa79)
d99e85b9 · Miss Islington (bot) · Victor Stinner · 769ddb07 · d99e85b9 · d99e85b9
Kaydet (Commit) d99e85b9 authored Eyl 13, 2017 tarafından Miss Islington (bot) Kaydeden (comit) Victor Stinner Eyl 13, 2017
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socket.py Lib/socket.py +2 -0

2017-09-13-18-05-56.bpo-31234.lGkcPg.rst ...S.d/next/Library/2017-09-13-18-05-56.bpo-31234.lGkcPg.rst +2 -0

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--- a/Lib/socket.py
+++ b/Lib/socket.py
@@ -711,6 +711,8 @@ def create_connection(address, timeout=_GLOBAL_DEFAULT_TIMEOUT,
            if source_address:
                sock.bind(source_address)
            sock.connect(sa)
+            # Break explicitly a reference cycle
+            err = None
            return sock

        except error as _:

--- a/Misc/NEWS.d/next/Library/2017-09-13-18-05-56.bpo-31234.lGkcPg.rst
+++ b/Misc/NEWS.d/next/Library/2017-09-13-18-05-56.bpo-31234.lGkcPg.rst
+socket.create_connection() now fixes manually a reference cycle: clear the
+variable storing the last exception on success.