How to Debug a segfault

• To debug segfaults enable core dumps:

ulimit -c unlimited

• In the same console as you ran ulimit run whatever program segfaulted.
• After it segfaults look for a core file
• Then run GNU_Debugger:

gdb <prog_name> core

• then run a stack backtrace in gdb

(gdb) bt

• You should get a good idea about what caused the problem.