I use debian 8.4 i386 on VM
I have build latest asterisk 13.9.1 from source.
I also use FreePBX 13.0.137.
I use latest unixODBC (2.3.4) and mysql odbc connector (5.3.6)
Problem is, that some times it crashes. It can happen about 10 times in day.
It crashes always after hangup.
I recompiled asterisk with DONT OPTIMIZE and BETTER BACKTRACES.
backtrace is on paste bin: