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+Title: This Week in Rust 287
+Number: 287
+Date: 2019-05-21
+Category: This Week in Rust
+
+Hello and welcome to another issue of *This Week in Rust*!
+[Rust](http://rust-lang.org) is a systems language pursuing the trifecta: safety, concurrency, and speed.
+This is a weekly summary of its progress and community.
+Want something mentioned? Tweet us at [@ThisWeekInRust](https://twitter.com/ThisWeekInRust) or [send us a pull request](https://github.com/cmr/this-week-in-rust).
+Want to get involved? [We love contributions](https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md).
+
+*This Week in Rust* is openly developed [on GitHub](https://github.com/cmr/this-week-in-rust).
+If you find any errors in this week's issue, [please submit a PR](https://github.com/cmr/this-week-in-rust/pulls).
+
+# Updates from Rust Community
+
+## News & Blog Posts
+
+* [4 years of Rust](https://blog.rust-lang.org/2019/05/15/4-Years-Of-Rust.html).
+* [The 2019 Rust event lineup](https://blog.rust-lang.org/2019/05/20/The-2019-Rust-Event-Lineup.html).
+* [Understanding zero cost abstractions](https://boats.gitlab.io/blog/post/zero-cost-abstractions/).
+* [Using Rust to scale Elixir for 11 million concurrent users](https://blog.discordapp.com/using-rust-to-scale-elixir-for-11-million-concurrent-users-c6f19fc029d3).
+* [Rust in Avast](https://vorner.github.io/2019/05/19/rust-in-avast.html).
+* [Evaluating pipelined rustc compilation](https://internals.rust-lang.org/t/evaluating-pipelined-rustc-compilation/10199).
+* [Analysis of various tricky Rust code](https://github.com/dtolnay/case-studies).
+* [Get back some compile time from monomorphization](https://llogiq.github.io/2019/05/18/momo.html).
+* [mem::uninitialized is deprecated](https://gankro.github.io/blah/initialize-me-maybe/).
+* [Shell completions in pure Rust](https://www.joshmcguigan.com/blog/shell-completions-pure-rust/).
+* [Creating C/C++ APIs in Rust](https://karroffel.gitlab.io/post/2019-05-15-rust/).
+* [How to start Rust chat app](https://medium.com/@steadylearner/how-to-start-rust-chat-app-499a194d0820).
+* [WebRender MVP ships in Firefox](https://mozillagfx.wordpress.com/2019/05/21/graphics-team-ships-webrender-mvp/).
+* [Rust in Motion](https://www.manning.com/livevideo/rust-in-motion) - a video series by Carol Nichols and Jake Goulding (requires purchase).
+* [Rust in Action](https://www.manning.com/books/rust-in-action) - a book by Tim McNamara (early access, requires purchase).
+
+# Crate of the Week
+
+This week we have two crates: [memory-profiles](https://github.com/nokia/memory-profiler), does what it says on the box. [momo](https://github.com/llogiq/momo) is a procedural macro that outlines generic conversions to reduce monomorphized code. Thanks to [ehsanmok](https://users.rust-lang.org/t/crate-of-the-week/2704/549) and llogiq for the suggestion!
+
+[Submit your suggestions and votes for next week][submit_crate]!
+
+[submit_crate]: https://users.rust-lang.org/t/crate-of-the-week/2704
+
+# Call for Participation
+
+Always wanted to contribute to open-source projects but didn't know where to start?
+Every week we highlight some tasks from the Rust community for you to pick and get started!
+
+Some of these tasks may also have mentors available, visit the task page for more information.
+
+* [Running a Rust Belt RustBridge](https://users.rust-lang.org/t/rust-belt-rustbridges/28332).
+* [Submit your experience for newly await syntax](https://internals.rust-lang.org/t/async-await-experience-reports/10200).
+* [www.rust-lang.org: Frontend cleanup: Remove Skeleton](https://github.com/rust-lang/www.rust-lang.org/issues/780).
+
+If you are a Rust project owner and are looking for contributors, please submit tasks [here][guidelines].
+
+[guidelines]: https://users.rust-lang.org/t/twir-call-for-participation/4821
+
+# Updates from Rust Core
+
+240 pull requests were [merged in the last week][merged]
+
+[merged]: https://github.com/search?q=is%3Apr+org%3Arust-lang+is%3Amerged+merged%3A2019-05-13..2019-05-20
+
+* [Move token tree related lexer state to a separate struct](https://github.com/rust-lang/rust/pull/60763)
+* [Stop using gensyms in HIR lowering](https://github.com/rust-lang/rust/pull/60960)
+* [Fix more escaping ReScopes](https://github.com/rust-lang/rust/pull/60765)
+* [Perform constant propagation into terminators](https://github.com/rust-lang/rust/pull/60745)
+* [Do some simple constant propagation in the `ConstProp` pass](https://github.com/rust-lang/rust/pull/60597)
+* [Test interaction of unions with non-zero/niche-filling optimization](https://github.com/rust-lang/rust/pull/60590)
+* [Forego caching for all participants in cycles, apart from root node](https://github.com/rust-lang/rust/pull/60444)
+* [Mark `core::alloc::Layout::from_size_align_unchecked` const](https://github.com/rust-lang/rust/pull/60370)
+* [Remove the unstable and deprecated `mpsc_select`](https://github.com/rust-lang/rust/pull/60921)
+* [Stabilize core parts of `MaybeUninit`](https://github.com/rust-lang/rust/pull/60445)
+* [Stabilize `vecdeque_rotate`](https://github.com/rust-lang/rust/pull/60678)
+* [Add entry-like methods to `HashSet`](https://github.com/rust-lang/rust/pull/60894)
+* [Add implementations of `last` in terms of `next_back` on a bunch of `DoubleEndedIterators`](https://github.com/rust-lang/rust/pull/60130)
+* [Fix display of const generics in rustdoc](https://github.com/rust-lang/rust/pull/60760)
+* [rustup: Avoid blocking on `CloseHandle`](https://github.com/rust-lang/rustup.rs/pull/1850)
+* [rustc-guide: Add documentation about profile-guided optimization](https://github.com/rust-lang/rustc-guide/pull/318)
+* [lint: convert `incoherent_fundamental_impls` into hard error](https://github.com/rust-lang/rust/pull/49799)
+* [clippy: Prevent symbocalypse](https://github.com/rust-lang/rust-clippy/pull/4110)
+* [crates.io: Fix performance regression on crate search](https://github.com/rust-lang/crates.io/pull/1746)
+
+## Approved RFCs
+
+Changes to Rust follow the Rust [RFC (request for comments)
+process](https://github.com/rust-lang/rfcs#rust-rfcs). These
+are the RFCs that were approved for implementation this week:
+
+*No RFCs were approved this week.*
+
+## Final Comment Period
+
+Every week [the team](https://www.rust-lang.org/team.html) announces the
+'final comment period' for RFCs and key PRs which are reaching a
+decision. Express your opinions now.
+
+### [RFCs](https://github.com/rust-lang/rfcs/labels/final-comment-period)
+
+* [disposition: merge] [Named custom cargo profiles](https://github.com/rust-lang/rfcs/pull/2678).
+
+### [Tracking Issues & PRs](https://github.com/rust-lang/rust/labels/final-comment-period)
+
+* [disposition: merge] [Stabilize RefCell::try_borrow_unguarded](https://github.com/rust-lang/rust/pull/60850).
+* [disposition: merge] [Tracking issue for reversing the bit pattern in an integer](https://github.com/rust-lang/rust/issues/48763).
+* [disposition: merge] [BufReader/Writer extension methods: is_empty, buffer](https://github.com/rust-lang/rust/issues/45323).
+* [disposition: merge] [Bors policy question: Auto-reassignment on r+](https://github.com/rust-lang/rust/issues/59489).
+
+## New RFCs
+
+*No new RFCs were proposed this week.*
+
+# Upcoming Events
+
+### Africa
+
+* [Jun  5. Johannesburg, ZA - Johannesburg Rust Meetup - informal discussions on topics related to the language](https://www.meetup.com/Johannesburg-Rust-Meetup/events/gpxrtqyzhbcb/).
+
+### Asia
+
+* [May 25. Taipei, TW - Rust Taiwan Meetup](https://www.facebook.com/events/381254712479005/).
+* [May 27. Tokyo, JP - Tokyo Rust Meetup - Rust LT #5](https://rust.connpass.com/event/129406/).
+
+### Europe
+
+* [May 23. Kharkiv, UA - PeerLab Kharkiv #Rust: Rust Success Stories](https://www.meetup.com/Native-Developers-in-UA/events/261508593/).
+* [May 23. Paris, FR - Rust Paris meetup #45](https://www.meetup.com/Rust-Paris/events/260925527/).
+* [May 26. St. Petersburg, RU - St. Petersburg Rust Meetup](https://www.meetup.com/spbrust/events/whmxrqyzhbjc/).
+* [May 29. Berlin, DE - OpenTechSchool Berlin - Rust Hack and Learn](https://www.meetup.com/opentechschool-berlin/events/gkkttqyzhbmc/).
+* [May 28. Vilnius, LT - Rust Vilnius - Rust Safety and Distributed Consensus](https://www.meetup.com/Rust-in-Vilnius/events/260937510/).
+* [Jun  6. Wroclaw, PL - Rust Wroclaw Meetup #11](https://www.meetup.com/Rust-Wroclaw/events/261283360/).
+
+### North America
+
+* [May 27. Durham, NC, US - Triangle Rustaceans - Project Night & Lightning Talks](https://www.meetup.com/triangle-rustaceans/events/mfglwpyzhbkc/).
+* [May 28. Dallas, TX, US - Dallas Rust - Last Tuesday](https://www.meetup.com/Dallas-Rust/events/zfgwzmyzhblc/).
+* [May 29. Vancouver, CA - Vancouver Rust meetup](https://www.meetup.com/Vancouver-Rust/events/fzqqwqyzhbmc/).
+* [May 29. Chicago, IL, US - Chicago Rust Meetup - Unsafe Rust](https://www.meetup.com/Chicago-Rust-Meetup/events/260918979).
+* [Jun  5. Atlanta, GA, US - Grab a beer with fellow Rustaceans](https://www.meetup.com/Rust-ATL/events/kkzkxqyzjbhb/).
+* [Jun  5. Indianapolis, IN, US - Indy.rs](https://www.meetup.com/indyrs/events/mffbtpyzjbhb/).
+
+### South America
+
+* [Jun 1. Sao Paulo, BR - Rust SP - Encontro Junho 2019](https://www.meetup.com/Rust-Sao-Paulo-Meetup/events/261123153/).
+
+If you are running a Rust event please add it to the [calendar] to get
+it mentioned here. Please remember to add a link to the event too.
+Email the [Rust Community Team][community] for access.
+
+[calendar]: https://www.google.com/calendar/embed?src=apd9vmbc22egenmtu5l6c5jbfc%40group.calendar.google.com
+[community]: mailto:community-team@rust-lang.org
+
+# Rust Jobs
+
+* [Senior Software Engineer, Backend - Rust at Kraken, Berlin, DE or remote](https://jobs.lever.co/kraken/4c864c8f-bde6-443d-b521-dd90df0e9105).
+* [Blockchain Runtime Engineer at Parity, Berlin, DE or remote](https://www.parity.io/jobs/#berlin-blockchain-runtime-engineer).
+
+*Tweet us at [@ThisWeekInRust](https://twitter.com/ThisWeekInRust) to get your job offers listed here!*
+
+# Quote of the Week
+
+> Just the presence of well integrated Algebraic Data Types (ADTs) makes an incredible amount of difference. They are used to represent errors in a meaningful and easy to understand way (`Result<T>`), are used to show that a function may or may not return a meaningful value without needing a garbage value (`Option<T>`), and the optional case can even be used to wrap a null pointer scenario in a safe way (Option<Ref<T>> being the closest to a literal translation I think).
+>
+> That’s just one small feature that permeates the language. Whatever the opposite of a death-of-a-thousand-cuts is, Rust has it.
+
+[tomcatfish on the orange website](https://news.ycombinator.com/item?id=19922344)
+
+Thanks to [PrototypeNM1](https://users.rust-lang.org/t/twir-quote-of-the-week/328/643) for the suggestion!
+
+[Please submit quotes and vote for next week!](https://users.rust-lang.org/t/twir-quote-of-the-week/328)
+
+*This Week in Rust is edited by: [nasa42](https://github.com/nasa42), [llogiq](https://github.com/llogiq), and [Flavsditz](https://github.com/Flavsditz).*
+
+<small>[Discuss on r/rust]().</small>