Existential Type rustc::ty::subst::[][src]

existential type <'tcx, 'a>: : DoubleEndedIterator<Item = Ty<'tcx>> + 'a;
🔬 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?