What's in the Box?
This managed to capture a common occurrence when I&#x27;ve tried to learn rust.  The compiler spits out a short but seemingly helpful error like this:<p><pre><code>  warning: trait objects without an explicit `dyn` are deprecated
    help: use `dyn`: `dyn Error`
</code></pre>
You make the code change it suggests and then you get a longer error message that says what it just told you to do is invalid.