#include <util/neo_err.h>
nerr_pass()
with the macro, the function name, file and lineno are
automagically recorded. Just pass the error.
this function is used to pass an error up a level in the call chain (ie, if the
error isn't handled at the current level). This allows us to track the
traceback of the error.
nerr_error_traceback(3), nerr_pass(3),
nerr_error_string(3), defined(3), nerr_pass_ctx(3),
nerr_passf(3), nerr_init(3), nerr_match(3),
nerr_log_error(3), nerr_ignore(3), nerr_register(3),
nerr_handle