abort_handler_s
extern _NORETURN_KYWD void abort_handler_s(const char *_RESTRICT_KYWD,
abort_handler_s(msg, NULL, error);
assert(set_constraint_handler_s(abort_handler_s) == NULL);
(void) set_constraint_handler_s(abort_handler_s);
assert(set_constraint_handler_s(ignore_handler_s) == abort_handler_s);
assert(set_constraint_handler_s(abort_handler_s) == ignore_handler_s);