File: wrong7.c

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#include <stdio.h>

int main() {
  int *p;

  p = (int*) malloc( sizeof(int) * 10 );
  printf("Now writing before our allocated array\n");
  p[-1] ^= 0x0F; /* bash before */
  printf("... and now after our allocated array\n");
  p[10] ^= 0x0F; /* bash after */
  printf("Did you notice?\n");
  free(p);

}