module providing automatic gdb backtraces on errors

 Devel::bt, when enabled, registers a handler for certain types of fatal
 errors, like segmentation faults, and, once such an error occurs, prints a
 debugger backtrace to standard output before exiting the program.
 .
 It is intended to be used to debug crashes in situations where running the
 failing program directly under a debugger is not possible, for example when
 trying to get more information from cpantesters or from users unfamiliar with
 gdb.