From: Berthold Höllmann
Date: March 24 1999 2:07pm
Subject: Re: Problems using myodbc from Python
List-Archive: http://lists.mysql.com/myodbc/94
Message-Id: <36F8F19F.30A2F443@public.uni-hamburg.de>
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Michael Widenius wrote:
> 
> >>>>> "se6y095" == se6y095  <Berthold> writes:
> 
> se6y095> Hello,
> se6y095> I try to to use myODBC from Python on my Linux box. I use mxODBC 1.0.1,
> se6y095> MySQL 3.22.20a and iODBC 2.50.22 with myodbc-2.50.22. mxODBC is compiled
> se6y095> with direct ODBC access to MySQL trough myodbc as well as access through
> se6y095> iODBC. When I use iODBC the access is OK, but when I try to load myodbc
> se6y095> I ge a segmentation fault. After fiddeling with gdb a bit I found:
> 
> se6y095> (gdb) run  -c "import ODBC.MySQL"
> se6y095> Starting program: /usr/local/bin/python -c "import ODBC.MySQL"
> 
> se6y095> Program received signal SIGSEGV, Segmentation fault.
> se6y095> 0x40083c72 in chunk_alloc (ar_ptr=0x400de1a0, nb=16) at malloc.c:2616
> se6y095> malloc.c:2616: Datei oder Verzeichnis nicht gefunden.
> se6y095> (gdb) where
> se6y095> #0  0x40083c72 in chunk_alloc (ar_ptr=0x400de1a0, nb=16) at
> se6y095> malloc.c:2616
...
> My guess would be that some call before the above have trashed the
> memory stack.
> 
> One way to get some more information would be to install the glibc
> development package (in source);  By using this, you could get
> information about what happens in libc_malloc !
> 
Ok I simply recompiled Python because of problems with another
application and the problem is gone away. Maybe a problem was, that I
had compiled MySQLmodule-1.4 with Python, but against an older version
of mySQL.

Cheers

Berthold
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