   <span class='lifetime'>&#39;d</span>: {
            <span class='comment'>// An anonymous scope is introduced because the borrow does not</span>
            <span class='comment'>// need to last for the whole scope x is valid for. The return</span>
            <span class='comment'>// of as_str must find a str somewhere before this function</span>
            <span class='comment'>// call. Obviously not happening.</span>
            <span class='macro'>println</span><span class='macro'>!</span>(<span cla