# 1.16.2 (February 15, 2022)

This release updates the minimum supported Rust version (MSRV) to 1.49,
the `mio` dependency to v0.8, and the (optional) `parking_lot`
dependency to v0.12. Additionally, it contains several bug fixes, as
well as internal refactoring and performance improvements.

### Fixed

- time: prevent panicking in `sleep` with large durations ([#4495])
- time: eliminate potential panics in `Instant` arithmetic on platforms
  where `Instant::now` is not monotonic ([#4461])
- io: fix `DuplexStream` not participating in cooperative yielding
  ([#4478])
- rt: fix potential double panic when dropping a `JoinHandle` ([#4430])

### Changed

- update minimum supported Rust version to 1.49 ([#4457])
- update `parking_lot` dependency to v0.12.0 ([#4459])
- update `mio` dependency to v0.8 ([#4449])
- rt: remove an unnecessary lock in the blocking pool ([#4436])
- rt: remove an unnecessary enum in the basic scheduler ([#4462])
- time: use bit manipulation instead of modulo to improve performance
  ([#4480])
- net: use `std::future::Ready` instead of our own `Ready` future
  ([#4271])
- replace deprecated `atomic::spin_loop_hint` with `hint::spin_loop`
  ([#4491])
- fix miri failures in intrusive linked lists ([#4397])

### Documented

- io: add an example for `tokio::process::ChildStdin` ([#4479])

### Unstable

The following changes only apply when building with `--cfg
tokio_unstable`:

- task: fix missing location information in `tracing` spans generated by
  `spawn_local` ([#4483])
- task: add `JoinSet` for managing sets of tasks ([#4335])
- metrics: fix compilation error on MIPS ([#4475])
- metrics: fix compilation error on arm32v7 ([#4453])

[#4495]: #4495
[#4461]: #4461
[#4478]: #4478
[#4430]: #4430
[#4457]: #4457
[#4459]: #4459
[#4449]: #4449
[#4462]: #4462
[#4436]: #4436
[#4480]: #4480
[#4271]: #4271
[#4491]: #4491
[#4397]: #4397
[#4479]: #4479
[#4483]: #4483
[#4335]: #4335
[#4475]: #4475
[#4453]: #4453

as per the discussion [here][1], we should probably address these
separately.

[1]: #4504 (comment)