Function rustc::ty::context::tls::span_debug[][src]

fn span_debug(span: Span, f: &mut Formatter) -> Result
🔬 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?

This is a callback from libsyntax as it cannot access the implicit state in librustc otherwise