1#include <stdlib.h> 2#include <unistd.h> 3 4int main(void) 5{ 6 int y = 0; 7 int* x = calloc(1,sizeof(int)); 8 free(x); 9 10 y += x[0]; 11 sleep(1); 12 y += x[0]; 13 14 return y; 15} 16