Markdown content kills it

Hi!

So I'm trying to use this lib to parse `.md` files (for a blog engine) and it has a structure such as:

```
---
title: Hello, World
---

Markdown content follows
```

But, any markdown use will immediately stop this lib from functioning. I can't quite pinpoint what the error is, but for example if I add a heading to the markdown content .. it stops working. 