If you put a code block after a list, the code block isn't formatted properly:

* bullet

    code block

You can resolve this by indenting the code block 8 spaces, which nests it under the bullet:

* bullet

        code block

Or put something invisible between them, like an HTML comment `<!-- comment -->` or a Markdown comment `<% comment %>`, which doesn't nest it:

* bullet

<%%>

    code block