Function rustc::util::common::time

pub fn time<T, F>(do_it: bool, what: &str, f: F) -> T where
    F: FnOnce() -> T, 

🔬 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?