Issue 1210377: Cursors not correctly closed after exception. (original) (raw)

If an exception occurs when going through a database, the cursors will not be correctly reset.

If I manually set the cursor to None (by doing db.dbc = None) it will work fine.

db = bsddb.btopen('/tmp/test.db', 'c') db.first() Traceback (most recent call last): File "", line 1, in ? File "/usr/lib/python2.4/bsddb/init.py", line 264, in first rv = self.dbc.first() _bsddb.DBNotFoundError: (-30990, 'DB_NOTFOUND: No matching key/data pair found') db['foo'] = 'bar' Traceback (most recent call last): File "", line 1, in ? File "/usr/lib/python2.4/bsddb/init.py", line 217, in setitem self._closeCursors() File "/usr/lib/python2.4/bsddb/init.py", line 192, in _closeCursors self.saved_dbc_key = c.current(0,0,0)[0] bsddb._db.DBInvalidArgError: (22, 'Invalid argument -- Cursor position must be set before performing this operation')

Here, I first open a new database. Since it is empty, db.first() will fail. When I after that try to add a key/value pair to the database it fails, since it tries to close an invalid cursor.

db = bsddb.btopen('/tmp/test.db', 'c') db.first() Traceback (most recent call last): File "", line 1, in ? File "/usr/lib/python2.4/bsddb/init.py", line 264, in first rv = self.dbc.first() _bsddb.DBNotFoundError: (-30990, 'DB_NOTFOUND: No matching key/data pair found') db.dbc = None db['foo'] = 'bar' db {'foo': 'bar'}

Here I do "db.dbc = None" after the exception and now it works just fine.