| error: `dyn` is a keyword in the 2018 edition | 
 |   --> $DIR/dyn-keyword.rs:8:9 | 
 |    | | 
 | LL |     let dyn = (); | 
 |    |         ^^^ help: you can use a raw identifier to stay compatible: `r#dyn` | 
 |    | | 
 |    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018! | 
 |    = note: for more information, see issue #49716 <https://github.com/rust-lang/rust/issues/49716> | 
 | note: the lint level is defined here | 
 |   --> $DIR/dyn-keyword.rs:5:9 | 
 |    | | 
 | LL | #![deny(keyword_idents)] | 
 |    |         ^^^^^^^^^^^^^^ | 
 |    = note: `#[deny(keyword_idents_2018)]` implied by `#[deny(keyword_idents)]` | 
 |  | 
 | error: aborting due to 1 previous error | 
 |  |