title: Issue with small example that uses strcpy in Xcode
body: <p>I'm trying to understand this code below but Xcode is giving me an error at the 2nd to last line saying "Thread 1: signal SIGABRT"</p>
  
  <pre><code>char string1[4] = "abc";
  char string2[4] = "def";
  
  printf("%s \n%s\n", string1, string2);
  
  strcpy(string1, string1+1); // Xcode points here, "Thread 1: signal SIGABRT"
  
  printf("%s \n%s", string1, string2);
  </code></pre>
  
  <p>What's going on ? I expected it to print</p>
  
  <pre><code>abc
  def
  bc
  def
  </code></pre>
  
  <p>but it obviously stops halfway through. </p>