Incorrect suggestion when type annotation on turbofished enum is needed

[5225225]

Given the following code: https://play.rust-lang.org/?version=nightly&mode=release&edition=2021&gist=b9b341939839ec733bf081c5ddf86e5b

enum OhNo<T, U> {
  A(T),
  B(U),
  C,
}

fn uwu() {
    OhNo::C::<u32, _>;
}

The current output is:

Compiling playground v0.0.1 (/playground)
error[E0282]: type annotations needed
 --> src/lib.rs:8:5
  |
8 |     OhNo::C::<u32, _>;
  |     ^^^^^^^^^^^^^^^^^ cannot infer type of the type parameter `U` declared on the enum `OhNo`
  |
help: consider specifying the generic arguments
  |
8 |     OhNo::<u32, _>::C::<u32, _>;
  |         ++++++++++

For more information about this error, try `rustc --explain E0282`.
error: could not compile `playground` due to previous error

But applying this causes an error, saying that C doesn't allow type arguments.

This happens on nightly and beta, but not on stable. I'm assuming the "consider specifying the generic arguments" was added recently.

I don't think we need the help here, because the generic arguments are already specified.

@rustbot label +D-invalid-suggestion