error.c:108
static void
warn_print(fmt, args)
    const char *fmt;
    va_list args;
{
    char buf[BUFSIZ];
    int len;

    err_snprintf(buf, BUFSIZ, fmt, args);
    len = strlen(buf);
    buf[len++] = '\n';
    rb_write_error2(buf, len);
}
