Can't compile with rust nightly (built 2015-03-05)

[LukasKalbertodt]

I cloned this repository and tried to cargo build it, but it fails:

    src/lib.rs:30:37: 30:45 error: type `iron::request::Body<'_>` does not implement any method in scope named `by_ref`
    src/lib.rs:30     match LimitReader::new(req.body.by_ref(), limit).read_to_end() {
                                                      ^~~~~~~~
    src/lib.rs:30:45: 30:45 help: methods from traits can only be called if the trait is in scope; the following trait is implemented but not in scope, perhaps add a `use` for it:
    src/lib.rs:30:45: 30:45 help: candidate #1: use `std::io::ReadExt`
    error: aborting due to previous error
    Could not compile `bodyparser`.

Version:

$ rustc -V
rustc 1.0.0-nightly (3b3bb0e68 2015-03-04) (built 2015-03-05)
$ cargo -V
cargo 0.0.1-pre-nightly (dd7c7bd 2015-03-04) (built 2015-03-04)

I tried to fix it by adding use std::io::ReadExt, but it is not the only error...

(I hope I didn't do anything wrong...)