From 90a56b0ab6757076af2f1c3fec5593d91baa6de8 Mon Sep 17 00:00:00 2001
From: Julien Danjou <julien@danjou.info>
Date: Thu, 22 Jun 2017 12:48:06 +0200
Subject: [PATCH] pgsql: fix self._conn.close() being called without connection

If an error occurs on connection establishment, self._conn is None so it can't
be closed.

Change-Id: If6fce24cb27aa7090b5165ca4a895c846c40d2dd
---
 tooz/drivers/pgsql.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tooz/drivers/pgsql.py b/tooz/drivers/pgsql.py
index ee92db1..fef4160 100644
--- a/tooz/drivers/pgsql.py
+++ b/tooz/drivers/pgsql.py
@@ -146,7 +146,8 @@ class PostgresLock(locking.Lock):
         try:
             return _lock()
         except Exception:
-            self._conn.close()
+            if self._conn:
+                self._conn.close()
             raise
 
     def release(self):