1 A literal value was used inside `#[derive]`.
3 Erroneous code example:
6 #[derive("Clone")] // error!
10 Only paths to traits are allowed as argument inside `#[derive]`. You can find
11 more information about the `#[derive]` attribute in the [Rust Book].
15 #[derive(Clone)] // ok!
19 [Rust Book]: https://doc.rust-lang.org/book/appendix-03-derivable-traits.html