Fix for CONPY-64:

9EOR9 · 9EOR9 · commit 2dab6a3b1085 · 2020-05-14T06:27:36.000+02:00
If a connection will be established without parameters we need to check kwargs
before checking if a poolname was specified.
diff --git a/src/mariadb_connection.c b/src/mariadb_connection.c
@@ -509,7 +509,7 @@ MrdbConnection_connect(
 
 
     /* if pool name exists, we need to return a connection from pool */
-    if ((pn= PyDict_GetItemString(kwargs, "pool_name")))
+    if (kwargs && (pn= PyDict_GetItemString(kwargs, "pool_name")))
     {
         if ((pool = PyDict_GetItem(cnx_pool, pn)))
         {

Original file line number	Diff line number	Diff line change
`@@ -509,7 +509,7 @@ MrdbConnection_connect(`
`509`	`509`
`510`	`510`
`511`	`511`	`/* if pool name exists, we need to return a connection from pool */`
`512`		`- if ((pn= PyDict_GetItemString(kwargs, "pool_name")))`
	`512`	`+ if (kwargs && (pn= PyDict_GetItemString(kwargs, "pool_name")))`
`513`	`513`	`{`
`514`	`514`	`if ((pool = PyDict_GetItem(cnx_pool, pn)))`
`515`	`515`	`{`