Function rustc_typeck::collect::impl_trait_ref[][src]

fn impl_trait_ref<'a, 'tcx>(
    tcx: TyCtxt<'a, 'tcx, 'tcx>,
    def_id: DefId
) -> Option<TraitRef<'tcx>>
🔬 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?