Function rustc::session::opt_span_bug_fmt[][src]

fn opt_span_bug_fmt<S: Into<MultiSpan>>(
    file: &'static str,
    line: u32,
    span: Option<S>,
    args: Arguments
) -> !
🔬 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?