macro ident matcher + field notation = "missing match arm"

[digama0]

pub struct Foo {
    field: (),
}
pub fn test(x: (Foo,)) {
    macro_rules! mac {
        ($field:ident) => {
            match x.0.$field {
                () => {}
            }
        };
    }
    mac!(field); // missing match arm
}
fn main() {}

Some observations:

• Using x.0 .$field instead of x.0.$field makes the error go away, which suggests that 0. is getting parsed as a float literal (I have seen this issue before enough times to know not to write x.0.0, but some cursory rustc testing suggests that this isn't actually a problem anymore? Or maybe it was an RA problem all along...)
• Using x.0.field works fine

rust-analyzer version: 241b9f9ae 2022-04-28 nightly

rustc version: rustc 1.62.0-nightly (69a5d2481 2022-04-27)

[flodiebold]

Probably duplicate of #1109.