I am working through Learn C The Hard Way and am stumped on something. I've written a simplified version of the problem I am running into to make it easier to get down to it. Here is the code:

#include <stdlib.h>

#define GROUP_SIZE 10
#define DATA_SIZE 64

struct Dummy {
    char *name;
};

struct Group {
    struct Dummy **dummies;
};

int main() {
    struct Group *group1 = malloc(sizeof(struct Group));
    group1->dummies = malloc(sizeof(struct Dummy) * GROUP_SIZE);
    struct Dummy *dummy1 = group1->dummies[3];

    // Why does this seg fault?
    dummy1->name = (char *) malloc(DATA_SIZE);

    return 0;
}

when I try to set the name pointer on one of my dummies I get a seg fault. Using valgrind it tells me this is uninitialized space. Why is this?