From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Sun, 14 Oct 2018 19:55:46 +0000 (-0400)
Subject: Don't call rollback on DBAPI connection that's "closed"
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=92c20be2c244c98735cdf91d747a9227b58b9854;p=thirdparty%2Fsqlalchemy%2Fsqlalchemy.git

Don't call rollback on DBAPI connection that's "closed"

Use the existence of ConnectionRecord.connection to estimate
that this connection is likely closed, and if so, don't
try to call "rollback" on it.  This rollback is normally harmless
but is causing segfaults in mysqlclient due to
https://github.com/PyMySQL/mysqlclient-python/issues/270.

Change-Id: I1d7c5f5a520527d8268b6334795c2051f7ceeea6
(cherry picked from commit a8781b51b4039eee56791b9dbfdee183f7a5b797)
---

diff --git a/lib/sqlalchemy/testing/engines.py b/lib/sqlalchemy/testing/engines.py
index f452a3e2f6..f963ba8b25 100644
--- a/lib/sqlalchemy/testing/engines.py
+++ b/lib/sqlalchemy/testing/engines.py
@@ -59,6 +59,12 @@ class ConnectionKiller(object):
         # not sure if this should be if pypy/jython only.
         # note that firebird/fdb definitely needs this though
         for conn, rec in list(self.conns):
+            if rec.connection is None:
+                # this is a hint that the connection is closed, which
+                # is causing segfaults on mysqlclient due to
+                # https://github.com/PyMySQL/mysqlclient-python/issues/270;
+                # try to work around here
+                continue
             self._safe(conn.rollback)
 
     def _stop_test_ctx(self):