Cargo.toml

[package]
name = "repro"
version = "0.1.0"
authors = ["Keith Wansbrough <Keith.Wansbrough@metaswitch.com>"]

[dependencies]
error-chain = "0.10"

lib.rs

#[macro_use]
extern crate error_chain;

error_chain! {
    foreign_links {
        StringContainsNul(::std::ffi::NulError)
            #[doc = "Attempted to pass a string containing `\0`"];
    }
}