[]Constant rustc_errors::TRACK_DIAGNOSTICS

pub const TRACK_DIAGNOSTICS: LocalKey<Cell<fn(_: &Diagnostic)>>
⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.