Macro syntax::span_err_or_warn [] [src]

macro_rules! span_err_or_warn {
    ($is_warning:expr, $session:expr, $span:expr, $code:ident, $($message:tt)*) => { ... };
}
🔬 This is a nightly-only experimental API. (rustc_private)

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