A very useful guide to investigating Linux issues is here:
If any of our software is crashing, more likely with Segmentation Fault, we would like to be sent a core dump as a minimum to investigate the crash.
Typically to create a core dump..
Run the command "ulimit -c"
make the crash occur again
check there is a core file in current folder then use these commands
gdb path/to/the/binary path/to/the/core
bt
A backtrace is generated; this allows the error location to be identified.