Existential Type rustc_typeck::collect::[][src]

existential type <'a, 'tcx>: : Iterator<Item = &'a GenericParam> + Captures<'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?