r must then check what kind of state the fiber is in to differentiate
errors from return values from user-defined signals.
</p>
<p>To create a fiber, use the <code class="mendoza-code">fiber/new</code> function. The fiber
constructor takes one or two arguments.  The first argument (required)
is the function that the fiber will execute. This function must accept
an arity of zero. The next argument (optional) is a collection of
flags checking what kinds of signals to trap and return via
<code class="mendoza-c