Calling __getattribute__ with a non-string name on a connection segfaults #809

Summary

Calling conn.__getattribute__(name) on a MySQLdb connection crashes the whole interpreter if name is not a string.

Environment

• mysqlclient 2.3.0)
• Python 3.13.5

Reproducer

from MySQLdb.connections import Connection

conn = Connection.__new__(Connection)
conn.__getattribute__(5)

Segmentation fault (core dumped)