% `unsafe`

<small>There is a new edition of the book and this is an old link.</small>

> Rust has a second language hiding out inside of it, unsafe Rust, which does not enforce memory safety guarantees.

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Here are the relevant sections in the new and old books:

* **[in the current edition: Ch 19.01 — Unsafe Rust][2]**
* [The Rustonomicon, The Dark Arts of Advanced and Unsafe Rust Programming][3]
* <small>[In the first edition: Ch 3.36 — `unsafe`][1]</small>


[1]: https://doc.rust-lang.org/1.30.0/book/first-edition/unsafe.html
[2]: ch20-01-unsafe-rust.html
[3]: ../nomicon/index.html
