[zimbatm]

Example usage with backtrace:

    set -o errtrace
    trap 'err_handler $?' ERR

    err_handler() {
      trap - ERR
      let i=0 exit_status=$1
      echo "Aborting on error $exit_status:"
      echo "--------------------"
      while caller $i; do ((i++)); done
      exit $?
    }