#![feature(unboxed_closures)]
#![allow(unknown_features)] #![feature(int_uint)]
#![feature(on_unimplemented)]
+// FIXME(#21363) remove `old_impl_check` when bug is fixed
+#![feature(old_impl_check)]
#![deny(missing_docs)]
#[macro_use]
pub mod str;
pub mod hash;
pub mod fmt;
+pub mod error;
// note: does not need to be public
mod tuple;