encoding_rs is copyright 2013-2016 Mozilla Foundation.

Licensed under the Apache License, Version 2.0
<LICENSE-APACHE or
https://www.apache.org/licenses/LICENSE-2.0> or the MIT
license <LICENSE-MIT or https://opensource.org/licenses/MIT>,
at your option. All files in the project carrying such
notice may not be copied, modified, or distributed except
according to those terms.

Test code within encoding_rs is dedicated to the Public Domain when so
designated (see the individual files for PD/CC0-dedicated sections).

The file utf_8_core.rs was extracted from the Rust project at revision
7ad7232422f7e5bbfa0e52dabe36c12677df19e2, whose COPYRIGHT file said (in part):

The Rust Project is copyright 2010, The Rust Project
Developers.

Licensed under the Apache License, Version 2.0
<LICENSE-APACHE or
http://www.apache.org/licenses/LICENSE-2.0> or the MIT
license <LICENSE-MIT or http://opensource.org/licenses/MIT>,
at your option. All files in the project carrying such
notice may not be copied, modified, or distributed except
according to those terms.