How to get errors inside a loop?

I'm building a compiler using this awesome lib, then sometimes I need get a error message from on parser inside of `many`, `sequence` or something like it.

For example, in this situation it works:

```
Combine.parse("ABC", fatal("something wrong happened!")) # {:error, "something wrong happened!"}
```

But, if I use `many`, for example, I can't get this error message

```
Combine.parse("ABC", many(fail("something wrong happened!"))) # [[]]
```

How to get the error message?