Trait bound impl Into not able to infer return type.

[jhgg]

In both these examples, the type of y is unable to be inferred by rust-analyzer:

fn a(x: impl Into<String>) {
    let y = x.into();
    y.to_ascii_lowercase();
}

fn b<T>(x: T)
where
    T: Into<String>,
{
    let y = x.into();
    y.to_ascii_lowercase();
}

However, interestingly enough, if the following is defined in the file (to shadow built in Into) it works:

pub trait Into<T>: Sized {
    fn into(self) -> T;
}

On: rust-analyzer version: 8232804 2021-07-30 nightly & rustc 1.53.0 (53cb7b09b 2021-06-17)

[flodiebold]

Duplicate of #5514.