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error[E0107]: this function takes 0 generic arguments but 1 generic argument was supplied
  --> $DIR/issue-100154.rs:4:5
   |
LL |     foo::<()>(());
   |     ^^^------ help: remove these generics
   |     |
   |     expected 0 generic arguments
   |
note: function defined here, with 0 generic parameters
  --> $DIR/issue-100154.rs:1:4
   |
LL | fn foo(i: impl std::fmt::Display) {}
   |    ^^^
   = note: `impl Trait` cannot be explicitly specified as a generic argument

error[E0277]: `()` doesn't implement `std::fmt::Display`
  --> $DIR/issue-100154.rs:4:15
   |
LL |     foo::<()>(());
   |     --------- ^^ `()` cannot be formatted with the default formatter
   |     |
   |     required by a bound introduced by this call
   |
   = help: the trait `std::fmt::Display` is not implemented for `()`
   = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
note: required by a bound in `foo`
  --> $DIR/issue-100154.rs:1:16
   |
LL | fn foo(i: impl std::fmt::Display) {}
   |                ^^^^^^^^^^^^^^^^^ required by this bound in `foo`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0107, E0277.
For more information about an error, try `rustc --explain E0107`.