error: lifetime `'FooBar` should have a snake case name --> $DIR/lint-non-snake-case-lifetimes.rs:4:6 | LL | fn f<'FooBar>( | ^^^^^^^ help: convert the identifier to snake case: `'foo_bar` | note: the lint level is defined here --> $DIR/lint-non-snake-case-lifetimes.rs:1:9 | LL | #![deny(non_snake_case)] | ^^^^^^^^^^^^^^ error: aborting due to 1 previous error