Constant syntax::diagnostics::plugin::TRACK_DIAGNOSTICS[]

pub const TRACK_DIAGNOSTICS: LocalKey<Cell<fn(&Diagnostic)>> = {
    #[inline]
    fn __init()
     -> Cell<fn(: &Diagnostic)> { <Cell>::new(default_track_diagnostic) }
    unsafe fn __getit()
     ->
         ::option::Option<&'static ::cell::UnsafeCell<::option::Option<Cell<fn(:
                                                                                   &Diagnostic)>>>> {
                                                                                                        #[thread_local]
                                                                                                        #[cfg(all(target_thread_local,
                                                                                                                  not(target_arch
                                                                                                                          =
                                                                                                                          "wasm32")))]
                                                                                                        static __KEY:
                                                                                                               ::thread::__FastLocalKeyInner<Cell<fn(:
                                                                                                                                                         &Diagnostic)>>
                                                                                                               =
                                                                                                            <::thread::__FastLocalKeyInner>::new();
                                                                                                        __KEY.get()
                                                                                                    }
    unsafe { <::thread::LocalKey>::new(__getit, __init) }
}
🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?