When closed, cursor.execute() raises TypeError; expect ProgrammingError

[jdufresne]

mysqlclient==1.3.6

In the following script, cursor.execute() is called on a closed cursor. The results is "TypeError: 'NoneType' object is not callable" but one expects a ProgrammingError. It looks as though errorhandler is assigned to None when closed in BaseCursor.close(). Full output below:

import MySQLdb

conn = MySQLdb.connect(user='root', db='mytest')
with conn.cursor() as cursor:
    cursor.execute('select 1')
cursor.execute('select 1')

$ venv/bin/python test.py
Traceback (most recent call last):
  File "test.py", line 6, in <module>
    cursor.execute('select 1')
  File "/home/jon/venv/lib/python2.7/site-packages/MySQLdb/cursors.py", line 181, in execute
    while self.nextset():
  File "/home/jon/venv/lib/python2.7/site-packages/MySQLdb/cursors.py", line 133, in nextset
    db = self._get_db()
  File "/home/jon/venv/lib/python2.7/site-packages/MySQLdb/cursors.py", line 166, in _get_db
    self.errorhandler(self, ProgrammingError, "cursor closed")
TypeError: 'NoneType' object is not callable