#14 *** glibc detected *** python: free(): invalid pointer: 0xb7

[P Adhia]

Environment:
Ubuntu : Fiesty Fawn
Python 2.5.1c1 (release25-maint, Apr 12 2007, 21:00:25)
DB2 9.1.2

All python-DB2 program produce above error message. Here's a simple program to reproduce the error.

#! /usr/bin/env python

import DB2

con = DB2.connect('ANYDB', 'xxxxxx', 'xxxxxx')
csr = con.cursor()
csr.close()
con.close()

[Nobody/Anonymous]

Logged In: NO

i have the same error

here is the error:

>> python test-db2.py
('Sanders', 'Mgr ')
*** glibc detected *** python: free(): invalid pointer: 0xb7d36d40 ***

and here the script test-db2.py:

#!/usr/bin/env python
import DB2
conn = DB2.connect(dsn='sample', uid='db2inst1', pwd='susi')
curs = conn.cursor()
curs.execute('select name, job from staff')
one_row = curs.fetchone()
print one_row
curs.close()
conn.close()

it appears to happen when the python shell exit's.

[Peter Fuereder]

Logged In: YES
user_id=1798331
Originator: NO

hello

sorry, yesterday I was a little bit to fast. I forgot to include some plattform information and my name.

Maschine: dual AMD Athlon(tm) MP 1800+
Kernel: Linux 2.6.20-15-generic #2 SMP i686 GNU/Linux
I also ran Ubuntu Fiesty Fawn
and yesterday I tried it with Python 2.5.1 (latest version from repo)

Today I compiled Python 2.4.3 and tried PyDB2 with it - and it works.
It seems there is a python 2.5 problem, but I am not such an expert.

[P Adhia]

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user_id=1163018
Originator: YES

I successfully tried the workaround suggested on
http://forums.gentoo.org/viewtopic-t-316912-highlight-\***+glibc+detected+***+free+invalid+pointer+0x1003e590+***.html

Specifially, I have set MALLOC_CHECK_=0 env.

From various forums it appears that, this may be caused by missing INCREF or an extra DECREF. Until, this bug is fixed, the above link gives a viable workaround.

[Jon Thoroddsen]

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user_id=2003727
Originator: NO

With such an easy reproduction, this is probably the PyObject_Del bug.
Try the latest release, and see if it fixes it.

"nobody" however might have incref/decref bug.

Is there somebody out there who has this with releases 1.1.0-2 and 1.1.0-3 but
for which it is fixed in 1.1.1 ?