src/test/ui/traits/negative-impls/negative-default-impls.stderr

   1 warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
   2   --> $DIR/negative-default-impls.rs:2:12
   3    |
   4 LL | #![feature(specialization)]
   5    |            ^^^^^^^^^^^^^^
   6    |
   7    = note: `#[warn(incomplete_features)]` on by default
   8    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
   9    = help: consider using `min_specialization` instead, which is more stable and complete
  10
  11 error[E0750]: negative impls cannot be default impls
  12   --> $DIR/negative-default-impls.rs:9:1
  13    |
  14 LL | default impl !MyTrait for u32 {}
  15    | ^^^^^^^      ^
  16
  17 error: aborting due to previous error; 1 warning emitted
  18
  19 For more information about this error, try `rustc --explain E0750`.