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error[E0053]: method `owo` has an incompatible type for trait
  --> $DIR/method-signature-matches.rs:11:15
   |
LL |     fn owo(_: u8) {}
   |               ^^ expected `()`, found `u8`
   |
note: type in trait
  --> $DIR/method-signature-matches.rs:6:15
   |
LL |     fn owo(x: ()) -> impl Sized;
   |               ^^
   = note: expected signature `fn(())`
              found signature `fn(u8)`
help: change the parameter type to match the trait
   |
LL -     fn owo(_: u8) {}
LL +     fn owo(_: ()) {}
   |

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0053`.