de> postcondition
          (unless <code class="computeroutput"><span class="identifier">inc</span></code> body threw
          an exception).
        </li>
</ul></div>
<p>
      For example, if there is a bug in the code calling <code class="computeroutput"><span class="identifier">inc</span></code>
      so that the function is called with <code class="computeroutput"><span class="identifier">x</span></code>
      equal to <code class="computeroutput"><span class="identifier">std</span><span class="speci