commit 779e7c933e777270897b1e35fa9e5b12eee12af9
author Stéphane Wirtel <stephane@wirtel.be> Wed May 24 20:24:27 2017 +0200
committer Xiang Zhang <angwerzx@126.com> Thu May 25 02:24:27 2017 +0800
tree 9704e78a3299141bf32b732f806e4a11fd8cfad2
parent 9395ca40f27a3e3c436ad1796c9194343511f057

bpo-30394: Fix a socket leak in smtplib.SMTP.__init__() (#1700) (#1788)

Lib/smtplib.py

diff --git a/Lib/smtplib.py b/Lib/smtplib.py
index e1651c0..0c61065 100755
--- a/Lib/smtplib.py
+++ b/Lib/smtplib.py
@@ -255,6 +255,7 @@
         if host:
             (code, msg) = self.connect(host, port)
             if code != 220:
+                self.close()
                 raise SMTPConnectError(code, msg)
         if local_hostname is not None:
             self.local_hostname = local_hostname