Function rustc::session::build_session_with_codemap

pub fn build_session_with_codemap(
    sopts: Options, 
    local_crate_source_file: Option<PathBuf>, 
    registry: Registry, 
    codemap: Rc<CodeMap>, 
    emitter_dest: Option<Box<Write + Send>>
) -> Session

🔬 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?