According to your coredump, the crash is not in FreeSWITCH, but in libmysql. Make sure you are using the threadsafe version of libmysql  check there wiki there is info on this

On 2/24/13 3:58 PM, "Vittorio Guglielmo" <vittorio.guglielmo@gmail.com> wrote:

  Hello everybody,
 
 I'm new to freeswitch (I recently switched form Asterisk).
 
 This evening, after one week of work (I have only 3 accounts enabled), freeswitch suddenly core-dumped.
 
 Now, every time I try to start it, it pushes a core dump.
 
 I read the wiki about procedures to gain back traces, and used the fscore_pb from the support-d of the source-dir,
 

 and here is the URL it gave to me for you:  http://pastebin.freeswitch.org/20623  <http://pastebin.freeswitch.org/20623>

 
 Thanks for your help
 
 Vic
 

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_________________________________________________________________________
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