read/new</span> <span class="mdzsyn-symbol">worker</span>)</code></pre><p>This limitation has been removed for some values (C functions and raw pointers)
in version 1.9.0, to make use of threads with native modules more seamless,
although certain abstract types like open files can still not be sent to threads
via <code class="mendoza-code">thread/send</code> or <code class="mendoza-code">thread/new</code>.
</p>
<h2 id="Blocking-and-non-blocking-sends-and-receives">Blocking and non-blocking sends and receive