] std::future

] std::task

] the alloc crate

] std::collections::HashMap and hashbrown

] std::mem::MaybeUninit and the deprecation of std::mem::uninitialized (mentioned: Error::type_id destabilization and std::pin discussion)

] NLL for Rust 2015 (mentioned: MIR)

] cargo --offline and cargo fetch

] ongoing stdlib constification

] read_vectored and write_vectored

] Iterator::copied

] dbg! enhancements

] #[must_use] for is_err and is_ok