#![feature(macro_attr)] expected subtree

[coolcatcoder]

rust-analyzer version: rust-analyzer 1.91.0-nightly (040a98a 2025-08-20)

rustc version: rustc 1.91.0-nightly (040a98af7 2025-08-20)

editor or extension: VSCode with the extension of version 0.4.2588

code snippet to reproduce:

#![feature(macro_attr)]

macro_rules! something {
    attr() () => {
        
    };
}

Error: expected subtree rust-analyzer (macro-def-error)

[ChayimFriedman2]

We don't implement this feature yet (it's also very new).