title: strcpy behaving differently on ios7
body: <p>IOS7 seems to come with a new implementation (optimisation maybe) of strings strcpy. Before I was able to copy strings from any position of the array but now if I start copying from any   position where (i % 4 != 0) it will crash.</p>
  
  <p>To show this I ran this code both in iOS6 and 7, and it crashed the app on 7:</p>
  
  <pre><code>  char *x = malloc(1024);
    strcpy(x, "hello world");
    char *x2 = x + 1;
    strcpy(x, x2);
  </code></pre>
  
  <p>what am I doing wrong?</p>