分段故障C错误

Question

所以，我被python宠坏了，我想再次拿起C。 我得到了这个段错误，我想我明白了原因，但不确定它为什么会发生。

long head = 1; // atleast that is what I was hoping for..
long *localranks = (long*) malloc(n * sizeof(long)); // size_t n = 50;
localranks[head] = 0; // seg fault here..


printf("head is %lu %d\n", head, head);

给出head is 4294967297 1

所以，虽然头应该是1 ..我猜，它正被传递给那个垃圾值.. 我该如何解决这个问题？