derivative crate: proc macro derivative not expanded

[cyqsimon]

use derivative::Derivative;
#[derive(Derivative)]
#[derivative(Debug)]
struct Foo {}

cargo check and cargo build both pass.

rust-analyzer version: 427061d 2022-06-19

rustc version: I tested both rustc 1.61.0 (fe5b13d68 2022-05-18) & rustc 1.63.0-nightly (5750a6aa2 2022-06-20)

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Possibly-related issue: #12582

[flodiebold]

Fixed by #12599, I think:

#[cfg_attr(not(test), proc_macro_derive(Derivative, attributes(derivative)))]
pub fn derivative(input: TokenStream) -> TokenStream {