pan> <span class='op'>=</span> <span class='number'>0</span>;
    <span class='lifetime'>&#39;b</span>: {
        <span class='comment'>// lifetime used is &#39;b because that&#39;s good enough.</span>
        <span class='kw'>let</span> <span class='ident'>y</span>: <span class='kw-2'>&amp;</span><span class='lifetime'>&#39;b</span> <span class='ident'>i32</span> <span class='op'>=</span> <span class='kw-2'>&amp;</span><span class='lifetime'>&#39;b</span> <span class='ident'>x</span>;
        <span class='