I don’t understand why my function segfault if I don’t create a *cpy and tried to work on *tab in my main without it.

#include <stdio.h>
#include <stdlib.h>

int     ft_ultimate_range(int **range, int min, int max)
{
    int i;

    i = 0;
    if (min >= max)
        return (0);
    *range = malloc(sizeof(**range) * (max - min));
    if (!*range)
        return (-1);
    while (min < max)
    {
        *range[i] = min;
        min++;
        i++;
    }
    return (i);
}

// int     ft_ultimate_range(int **range, int min, int max)
// {
//     int i;
//     int *cpy;

//     i = 0;
//     if (min >= max)
//         return (0);
//     cpy = malloc(sizeof(cpy) * (max - min));
//     if (!cpy)
//         return (-1);
//     while (min < max)
//     {
//         cpy[i] = min;
//         min++;
//         i++;
//     }
//     *range = cpy;
//     return (i);
// }

int     main(void)
{
    int *tab;
    int min = 10;
    int max = 20;
    int i = 0;
    int ret = 0;

    ret = ft_ultimate_range(&tab, min, max);
    while (i < max - min)
    {
        printf("tab[%d] = %dn", i, tab[i]);
        i++;
    }
    printf("ret = %dn", ret);
    free(tab);
    return (0);
}

Why my 1st function segfault, and the 2nd one work ?
If someone can explain me with some details I will apreciate it.
Thx for your help…