Language: C
Label: vulnerable
CWE: CWE-416 \u2014 Use After Free
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.

Code:
get_list_range(char_u **str, int *num1, int *num2)
{
    int		len;
    int		first = FALSE;
    varnumber_T	num;

    *str = skipwhite(*str);
    if (**str == '-' || vim_isdigit(**str))  // parse "from" part of range
    {
	vim_str2nr(*str, NULL, &len, 0, &num, NULL, 0, FALSE, NULL);
	*str += len;
	*num1 = (int)num;
	first = TRUE;
    }
    *str = skipwhite(*str);
    if (**str == ',')			// parse "to" part of range
    {
	*str = skipwhite(*str + 1);
	vim_str2nr(*str, NULL, &len, 0, &num, NULL, 0, FALSE, NULL);
	if (len > 0)
	{
	    *num2 = (int)num;
	    *str = skipwhite(*str + len);
	}
	else if (!first)		// no number given at all
	    return FAIL;
    }
    else if (first)			// only one number given
	*num2 = *num1;
    return OK;
}