I posted a bug to clippy where it leads to incorrect (compiling but but buggy code) 3 weeks ago. So far it looks like no one even looked at the bug report. No triage has been done.
Since it causes bugs in the changed code it seems like quite a nasty issue. Most incorrect clippy lint usually just cause a compile failure.
I'm not sure what to do to ping the relevant devs about this forgotten issue other than post here.
The issue in question: Incorrect clippy::derivable_impls in the presence of conditional compilation · Issue #13160 · rust-lang/rust-clippy · GitHub