warning: anonymous parameters are deprecated and will be removed in the next edition
  --> $DIR/future-incompatible-lint-group.rs:7:10
   |
LL |     fn f(u8) {}
   |          ^^ help: try naming the parameter or explicitly ignoring it: `_: u8`
   |
   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
   = note: `#[warn(anonymous_parameters)]` on by default

error: this attribute can only be applied at the crate level
  --> $DIR/future-incompatible-lint-group.rs:13:12
   |
LL |     #![doc(test(some_test))]
   |            ^^^^^^^^^^^^^^^
   |
   = note: read <https://doc.rust-lang.org/nightly/rustdoc/the-doc-attribute.html#at-the-crate-level> for more information
   = note: `#[deny(invalid_doc_attributes)]` on by default

error: aborting due to 1 previous error; 1 warning emitted