rshal mailbox-buf
load-image-dict)</code>.
</p>
<p>Values that cannot be marshalled, including thread values, cannot be sent as
messages to other threads, or even as part of a message to another thread. For
example, the following will not work because open file handles cannot be
marshalled.
</p>
<pre class="mendoza-codeblock"><code data-language="janet">(<span class="mdzsyn-coresym">def</span> <span class="mdzsyn-symbol">file</span> (<span class="mdzsyn-coresym">file/open</span> <span class="mdzsyn-string">