CPP Femtozip Infinite Loop in IntSet.h

[canselcik]

When provided with a large quantity of files/data, femtozip gets into an infinite loop. This issue can be tracked down to the insert(int, int*, int*, size_t) method in IntSet.h.

inline int insert(int n, int *b, int *end, size_t capacity) {
    int *p = b + (n % capacity);
    while (*p != -1) {
        if (*p == n) {
            return 0;
        }
        p++;
        if (p == end) {
            p = b;
        }
    }  
    *p = n;
    return 1;
}

The loop while (*p != -1) never completes as p is never equal to -1 or n.