This C program crashes after a couple of loops. What is wrong with it and how can it be fixed? (theoretically the program should run forever)

#include

#include

#include

int main(void) {

int i, j = 0;

while(1) {

int size = 10000000;

int *a = (int *) malloc(size * sizeof(int));

for(i = 0; i < size; i++)

a[i] = i;

printf("repetition %d ", ++j);

}

return 0;

}