Code bloat: Why should meta_trap_err() display error about itself?

[Explorer09]

I can't grab the idea behind this design:

meta_trap_err(){
	if [ ${#} -ne 4 ]; then
		printf 'ERROR: %s: Wrong function argument quantity!\n' "${FUNCNAME[0]}" 1>&2
		return "${COMMON_RESULT_FAILURE}"
	fi
	local -ir line_error_location=${1}; shift # The line number that triggers the error
	local -r failing_command="${1}"; shift # The failing command
	local -ir failing_command_return_status=${1}; shift # The failing command's return value
	local -r failing_function="${1}"
	meta_trap_err_print_debugging_info "${line_error_location}" "${failing_command}" "${failing_command_return_status}" "${failing_function}"
	return "${COMMON_RESULT_SUCCESS}"
}; declare -fr meta_trap_err

And this:

meta_trap_err_print_debugging_info(){
	if [ ${#} -ne 4 ]; then
		printf 'ERROR: %s: Wrong function argument quantity!\n' "${FUNCNAME[0]}" 1>&2
		return "${COMMON_RESULT_FAILURE}"
	fi
...

Functions intending to display errors need to display error about themselves? (Funny error message picture: Dialog box saying "An error occurred while displaying previous error.") Enough said.