if statement causing segmentation fault

I'm writing a cache simulator, and for some reason, my if statements keep giving me segfaults. For debugging purposes, I've added some print statements. Everything prints exactly the way I expect it to, up until just before the if statement, and then it just spits back "Segmentation Fault"/

    int find_set(node** cache, unsigned set_i, long t, int E){
     printf("finding set\n");
     int i; //index                                                             
     int val;
     for (i = 0; i < E; i++){
       printf("trying seti = %d and i = %d \n",set_i,i);
       printf("cache[set_i][i]->valid_bit = %d\n",cache[set_i][i]->valid_bit);
       printf("cache[set_i][i]->tag = %d\n",cache[set_i][i]->tag);
     if (cache[set_i][i]->valid_bit == 1) &&
        ((cache[set_i][i]->tag) == t){
       printf("found tag! \n");
       cache[set_i][i]->LRU_count = 0; //just used                          
       return i; //index of the set we found                                
    }
   }
  }
  return -1; //not found                                                     
 }

and it spits back "Segmentation Fault" when I try to run it. I'm out of ideas. Help?