[1.10.x] Fixed #26991 -- Fixed a crash in MySQL where SELECT @@SQL_AUTO_IS_NULL doesn't return a result.

Backport of 431cbd115b from master

django/db/backends/mysql/features.py

@@ -75,4 +75,5 @@ class DatabaseFeatures(BaseDatabaseFeatures):
     def is_sql_auto_is_null_enabled(self):
         with self.connection.cursor() as cursor:
             cursor.execute('SELECT @@SQL_AUTO_IS_NULL')
-            return cursor.fetchone()[0] == 1
+            result = cursor.fetchone()
+            return result and result[0] == 1

docs/releases/1.10.1.txt

@@ -9,4 +9,5 @@ Django 1.10.1 fixes several bugs in 1.10.
 Bugfixes
 ========
 
-* ...
+* Fixed a crash in MySQL connections where ``SELECT @@SQL_AUTO_IS_NULL``
+  doesn't return a result (:ticket:`26991`).