[ZODB-Dev] George Bailey'd objects cause failure in FileStorage._loadBack

[Magnus Lycka]

At 11:37 2002-10-31 +0000, Toby Dickenson wrote:
>Can you post a simple way to reproduce this?

Sure. It would be great if someoone took a look
at this before I post a bug report, in case I did
something wrong...
---------------------------
# georgebaileytest.py
import ZODB, ZODB.FileStorage, Persistence, pprint

storage = ZODB.FileStorage.FileStorage('test.fs')
db = ZODB.DB(storage)
connection = db.open()
root = connection.root()

class MyTest(Persistence.Persistent):
     def __init__(self, value):
         self.value = value


george = MyTest('Bailey')

root['to be unborn'] = george
get_transaction().commit()

print "Root", root
print "george", george
print "george.value", george.value

pprint.pprint (db.undoLog())

id = db.undoLog()[0]['id']
print id
db.undo(id)
get_transaction().commit()
connection.sync()

print "Root", root
print "george", george
print "george.value", george.value
--------------------------------------
I get:
X:\xxx>python georgebaileytest.py
Root {'to be unborn': <MyTest instance at 008796D0>}
george <MyTest instance at 008796D0>
george.value Bailey
[{'description': '',
   'id': 'A0iIjJjEm6M=',
   'time': 1036074995.8049998,
   'user_name': ''},
  {'description': 'initial database creation',
   'id': 'A0iIjJjEm6I=',
   'time': 1036074995.8049998,
   'user_name': ''}]
A0iIjJjEm6M=
Root {}
george <MyTest instance at 008796D0>
george.value
Traceback (most recent call last):
   File "georgebaileytest.py", line 34, in ?
     print "george.value", george.value
   File "G:\Python22\Lib\site-packages\ZODB\Connection.py", line 522, in 
setstate

     p, serial = self._storage.load(oid, self._version)
   File "G:\Python22\Lib\site-packages\ZODB\FileStorage.py", line 619, in load
     return self._load(oid, version, self._index, self._file)
   File "G:\Python22\Lib\site-packages\ZODB\FileStorage.py", line 605, in _load
     return _loadBack(file, oid, pnv)
   File "G:\Python22\Lib\site-packages\ZODB\FileStorage.py", line 2098, in 
_loadB
ack
     doid, serial, prev, tloc, vlen, plen = unpack(">8s8s8s8sH8s", h)
struct.error: unpack str size does not match format

-- 
Magnus Lycka, Thinkware AB
Alvans vag 99, SE-907 50 UMEA, SWEDEN
phone: int+46 70 582 80 65, fax: int+46 70 612 80 65
http://www.thinkware.se/  mailto:magnus@thinkware.se