ent">read</span>() {
            <span class="comment">// raise error</span>
            <span class="prelude-val">Err</span>(<span class="ident">nb</span>::<span class="ident">Error</span>::<span class="ident">Other</span>(<span class="ident">e</span>)) <span class="op">=</span><span class="op">&gt;</span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">Error</span>::<span class="ident">Serial</span>(<span class="ident">e</span>)),
            <span class="prelude-va