feature flag `if` not being taken into consideration

Summary

Code is here -> https://github.com/librespot-org/librespot/blob/650d41b020691fec6c7d2c90c0f6de91ac8635cf/discovery/src/lib.rs#L103-L126

For this block:

        let svc;

        cfg_if! {
            if #[cfg(feature = "with-dns-sd")] {
                svc = dns_sd::DNSService::register(
                    Some(name.as_ref()),
                    "_spotify-connect._tcp",
                    None,
                    None,
                    port,
                    &["VERSION=1.0", "CPath=/"],
                )
                .unwrap();

            } else {
                let responder = libmdns::Responder::spawn(&tokio::runtime::Handle::current())?;
                svc = responder.register(
                    "_spotify-connect._tcp".to_owned(),
                    name,
                    port,
                    &["VERSION=1.0", "CPath=/"],
                )
            }
        };

clippy reports unneeded late initalization. I think it can't "see" the that this feature-based if exists due to how the macro works.

Lint Name

needless_late_init

Version

rustc 1.60.0 (7737e0b5c 2022-04-04)
binary: rustc
commit-hash: 7737e0b5c4103216d6fd8cf941b7ab9bdbaace7c
commit-date: 2022-04-04
host: x86_64-unknown-linux-gnu
release: 1.60.0
LLVM version: 14.0.0

Additional Labels

No response

Start with the cfg_if! block in discovery/src/lib.rs at lines 103-126 and reproduce the needless_late_init warning using the reported Rust 1.60.0 context. Read the lint's handling of macro-expanded, feature-gated branches and determine how this case should be recognized. Done means the valid feature-based initialization no longer produces the false-positive warning.