Incorrect error when specifying `impl Trait` explicitly

Code

struct S;
struct F;
impl F {
    fn foo(self, _x: impl Sized) {}
}

fn test() {
    F.foo::<u32>(S);
}

Current output

error[E0107]: method takes 0 generic arguments but 1 generic argument was supplied
 --> src/lib.rs:8:7
  |
8 |     F.foo::<u32>(S);
  |       ^^^------- help: remove the unnecessary generics
  |       |
  |       expected 0 generic arguments
  |
note: method defined here, with 0 generic parameters
 --> src/lib.rs:4:8
  |
4 |     fn foo(self, _x: impl Sized) {}
  |        ^^^
  = note: `impl Trait` cannot be explicitly specified as a generic argument

error[E0308]: mismatched types
 --> src/lib.rs:8:18
  |
8 |     F.foo::<u32>(S);
  |       ---------- ^ expected `u32`, found `S`
  |       |
  |       arguments to this method are incorrect
  |
note: method defined here
 --> src/lib.rs:4:8
  |
4 |     fn foo(self, _x: impl Sized) {}
  |        ^^^       --------------

Desired output

error[E0107]: method takes 0 generic arguments but 1 generic argument was supplied
 --> src/lib.rs:8:7
  |
8 |     F.foo::<u32>(S);
  |       ^^^------- help: remove the unnecessary generics
  |       |
  |       expected 0 generic arguments
  |
note: method defined here, with 0 generic parameters
 --> src/lib.rs:4:8
  |
4 |     fn foo(self, _x: impl Sized) {}
  |        ^^^
  = note: `impl Trait` cannot be explicitly specified as a generic argument

Rationale and extra context

The second error is confusing, since rustc considers it as if we could specify the value of impl Trait, which we cannot. It would be better if the impl Trait type would be inferred.

Other cases

Rust Version

rustc 1.85.0 (4d91de4e4 2025-02-17)

Anything else?

No response

Start with the Rust reproducer in the issue and run it with the reported rustc 1.85.0 version to observe the E0107 and E0308 diagnostics. Trace the compiler path that reports the method-call type mismatch; done means the explicit impl Trait case reports only the E0107 diagnostic shown in the desired output.