error: anonymous parameters are deprecated and will be removed in the next edition.
  --> $DIR/future-incompatible-lint-group.rs:4:10
   |
LL |     fn f(u8) {} //~ ERROR anonymous parameters are deprecated
   |          ^^ help: Try naming the parameter or explicitly ignoring it: `_: u8`
   |
note: lint level defined here
  --> $DIR/future-incompatible-lint-group.rs:1:9
   |
LL | #![deny(future_incompatible)]
   |         ^^^^^^^^^^^^^^^^^^^
   = note: #[deny(anonymous_parameters)] implied by #[deny(future_incompatible)]
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!
   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>

error: aborting due to previous error