The Rust team is happy to announce the latest version of Rust, 1.11. Rust is a systems programming language focused on safety, speed, and concurrency.

As always, you can install Rust 1.11 from the appropriate page on our website, and check out the detailed release notes for 1.11 on GitHub. 1109 patches were landed in this release.

What's in 1.11 stable

Much of the work that went into 1.11 was with regards to compiler internals that are not yet stable. We're excited about features like MIR becoming the default and the beginnings of incremental compilation, and the 1.11 release has laid the groundwork.

As for user-facing changes, last release, we talked about the new cdylib crate type.

The existing dylib dynamic library format will now be used solely for writing a dynamic library to be used within a Rust project, while cdylibs will be used when compiling Rust code as a dynamic library to be embedded in another language. With the 1.10 release, cdylibs are supported by the compiler, but not yet in Cargo. This format was defined in RFC 1510.

Well, in Rust 1.11, support for cdylibs has landed in Cargo! By adding this to your Cargo.toml:

crate-type = ["cdylib"]

You'll get one built.

In the standard library, the default hashing function was changed, from SipHash 2-4 to SipHash 1-3. We have been thinking about this for a long time, as far back as the original decision to go with 2-4:

we proposed SipHash-2-4 as a (strong) PRF/MAC, and so far no attack whatsoever has been found, although many competent people tried to break it. However, fewer rounds may be sufficient and I would be very surprised if SipHash-1-3 introduced weaknesses for hash tables.

See the detailed release notes for more.

Library stabilizations

• The append method was added to BinaryHeap, BTreeMap, and BTreeSet. In addition, split_off was added to BTreeMap and BTreeSet::split_off.
• The to_degrees and to_radians methods were on the f32 and f64 types in libstd, but they are now in libcore as well.
• Iterator has two new methods: sum and product
• Both Cell and RefCell gained get_mut.
• assert_eq! accepts a custom error message, like assert! does.
• The main thread is now called "main" instead of "<main>".

See the detailed release notes for more.

Cargo features

• Cargo added color support for Windows consoles, and you can now configure the colors of stderr as well as stdout.
• Build scripts can now emit warnings.
• As mentioned above, support was added for the cdylib crate type.
• Cargo now prevents publishing crates when files are dirty.

See the detailed release notes for more.

Contributors to 1.11

We had 126 individuals contribute to 1.11. Thank you so much!

• Aaklo Xu
• Aaronepower
• Aleksey Kladov
• Alexander Polyakov
• Alexander Stocko
• Alex Burka
• Alex Crichton
• Alex Ozdemir
• Alfie John
• Amanieu d'Antras
• Andrea Canciani
• Andrew Brinker
• Andrew Paseltiner
• Andrey Tonkih
• Andy Russell
• Ariel Ben-Yehuda
• bors
• Brian Anderson
• Carlo Teubner
• Carol (Nichols || Goulding)
• CensoredUsername
• cgswords
• cheercroaker
• Chris Krycho
• Chris Tomlinson
• Corey Farwell
• Cristian Oliveira
• Daan Sprenkels
• Daniel Firth
• diwic
• Eduard Burtescu
• Eduard-Mihai Burtescu
• Emilio Cobos Álvarez
• Erick Tryzelaar
• Esteban Küber
• Fabian Vogt
• Felix S. Klock II
• flo-l
• Florian Berger
• Frank McSherry
• Georg Brandl
• ggomez
• Gleb Kozyrev
• Guillaume Gomez
• Hendrik Sollich
• Horace Abenga
• Huon Wilson
• Ivan Shapovalov
• Jack O'Connor
• Jacob Clark
• Jake Goulding
• Jakob Demler
• James Alan Preiss
• James Lucas
• James Miller
• Jamey Sharp
• Jeffrey Seyfried
• Joachim Viide
• John Ericson
• Jonas Schievink
• Jonathan L
• Jonathan Price
• Jonathan Turner
• Joseph Dunne
• Josh Stone
• Jupp Müller
• Kamal Marhubi
• kennytm
• Léo Testard
• Liigo Zhuang
• Loïc Damien
• Luqman Aden
• Manish Goregaokar
• Mark Côté
• marudor
• Masood Malekghassemi
• Mathieu De Coster
• Matt Kraai
• Mátyás Mustoha
• M Farkas-Dyck
• Michael Necio
• Michael Rosenberg
• Michael Woerister
• Mike Hommey
• Mitsunori Komatsu
• Morten H. Solvang
• Ms2ger
• Nathan Moos
• Nick Cameron
• Nick Hamann
• Nikhil Shagrithaya
• Niko Matsakis
• Oliver Middleton
• Oliver Schneider
• Paul Jarrett
• Pavel Pravosud
• Peter Atashian
• Peter Landoll
• petevine
• Reeze Xia
• Scott A Carr
• Sean McArthur
• Sebastian Thiel
• Seo Sanghyeon
• Simonas Kazlauskas
• Srinivas Reddy Thatiparthy
• Stefan Schindler
• Steve Klabnik
• Steven Allen
• Steven Burns
• Tamir Bahar
• Tatsuya Kawano
• Ted Mielczarek
• Tim Neumann
• Tobias Bucher
• Tshepang Lekhonkhobe
• Ty Coghlan
• Ulrik Sverdrup
• Vadim Petrochenkov
• Vincent Esche
• Wangshan Lu
• Will Crichton
• Without Boats
• Wojciech Nawrocki
• Zack M. Davis
• 吴冉波