lass="op">)</span>
  <span class="op">}</span><span class="op">)</span>
  <span class="va">y</span>
<span class="op">}</span>

<span class="va">sess</span><span class="op">$</span><span class="fu">run</span><span class="op">(</span><span class="fu">stop_if_negative3</span><span class="op">(</span><span class="va">x</span><span class="op">)</span><span class="op">)</span>
<span class="co"># [&lt;#&gt; Error in py_call_impl(callable, dots$args, dots$keywords): InvalidArgumentError: assertion failed: </span>
<