Missing key bug

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.0.5/handlebars.js"></script>
<div id="output">
</div>
<script type="template/handlebars" id="template">
  <p>Top level Foo: {{top_level_foo}}</p>
  <p>Top level Bar (missing): {{top_level_bar}}</p>
  <p>Nested.foo: {{nested.foo}}</p>
  <p>nested.bar (missing): {{nested.bar}}</p>
</script>

JavaScript

Handlebars.registerHelper("helperMissing", function(context, options) {
	console.error(`Missing key ${context.name}`);
  return "MIA"
});


var template = Handlebars.compile(document.getElementById('template').innerHTML);



document.getElementById('output').innerHTML = template({
	top_level_foo: "Foo",
  nested: {
  	foo: "foo",
  }
});