draft 316

Author: nasa42

drafts/2019-12-10-this-week-in-rust.md

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+Title: This Week in Rust 316
+Number: 316
+Date: 2019-12-10
+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
+
+### #Rust2020
+
+Find all #Rust2020 posts at [Read Rust](https://readrust.net/rust-2020/).
+
+# Crate of the Week
+
+This week's crate is [joinery](https://docs.rs/joinery), a library for generic string joining.
+
+Thanks to [Nathan West](https://users.rust-lang.org/t/crate-of-the-week/2704/677) for the suggestions!
+
+[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.
+
+* [heed: Support windows and make the tests pass](https://github.com/Kerollmops/heed/pull/25). Heed is a fully typed LMDB wrapper with minimum overhead.
+* [crates.io: carols10cents will be mentoring multiple issues for the month of November & December](https://github.com/rust-lang/crates.io/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc+label%3AE-mentor).
+
+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
+
+264 pull requests were [merged in the last week][merged]
+
+[merged]: https://github.com/search?q=is%3Apr+org%3Arust-lang+is%3Amerged+merged%3A2019-11-25..2019-12-02
+
+* [stabilize nested self receivers in 1.41.0](https://github.com/rust-lang/rust/pull/64325)
+* [add memoization for const function evaluations](https://github.com/rust-lang/rust/pull/66294)
+* [add crc and crypto to target feature whitelist on arm](https://github.com/rust-lang/rust/pull/66918)
+* [conditional compilation for sanitizers](https://github.com/rust-lang/rust/pull/66245)
+* [add support for sanitizer recover and tracking origins of uninitialized memory](https://github.com/rust-lang/rust/pull/66522)
+* [async fn resume after completion](https://github.com/rust-lang/rust/pull/66321)
+* [use structured suggestion when requiring `Copy` constraint in type param](https://github.com/rust-lang/rust/pull/66567)
+* [various tweaks to diagnostic output](https://github.com/rust-lang/rust/pull/66754)
+* [add version mismatch help message for unimplemented trait](https://github.com/rust-lang/rust/pull/66561)
+* [AST address-of](https://github.com/rust-lang/rust/pull/66671)
+* [initial implementation of or-pattern usefulness checking](https://github.com/rust-lang/rust/pull/66612)
+* [polonius: illegal subset relation errors using placeholder loans](https://github.com/rust-lang/polonius/pull/137)
+* [fix opaque types resulting from projections in function signature](https://github.com/rust-lang/rust/pull/66178)
+* [simplify memory categorization](https://github.com/rust-lang/rust/pull/66246)
+* [remove interior mutability in mir predecessors cache](https://github.com/rust-lang/rust/pull/64736)
+* [rustc: move debug info from LocalDecl and UpvarDecl into a dedicated VarDebugInfo](https://github.com/rust-lang/rust/pull/56231)
+* [create promoted MIR fragments for `const` and `static`s](https://github.com/rust-lang/rust/pull/66642)
+* [alloc: add new_zeroed() versions like new_uninit()](https://github.com/rust-lang/rust/pull/66128)
+* [impl TrustedLen for vec::Drain](https://github.com/rust-lang/rust/pull/66759)
+* [atomic as_mut_ptr](https://github.com/rust-lang/rust/pull/66705)
+* [implement Debug for MaybeUninit](https://github.com/rust-lang/rust/pull/65013)
+* [libc: add support for shared memory operations for solaris/illumos](https://github.com/rust-lang/libc/pull/1584)
+* [cargo: stabilize profile-overrides](https://github.com/rust-lang/cargo/pull/7591)
+* [rustup: add toolchain install --allow-downgrade option](https://github.com/rust-lang/rustup/pull/2126)
+* [docs.rs: match library properly if multiple crate-types are in use](https://github.com/rust-lang/docs.rs/pull/499)
+
+## 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)
+
+*No RFCs are currently in final comment period.*
+
+### [Tracking Issues & PRs](https://github.com/rust-lang/rust/labels/final-comment-period)
+
+* [disposition: merge] [Add method Result::into_ok](https://github.com/rust-lang/rust/pull/66045).
+* [disposition: merge] [From<NonZero*> impls for wider NonZero types](https://github.com/rust-lang/rust/pull/66277).
+* [disposition: merge] [Change unused_labels from allow to warn](https://github.com/rust-lang/rust/pull/66325).
+
+## New RFCs
+
+* [process-handle-for-async](https://github.com/rust-lang/rfcs/pull/2823).
+
+# Upcoming Events
+
+### Europe
+
+* [Dec 11. Hamburg, DE - Rust Hack & Learn December 2019](https://www.meetup.com/Rust-Meetup-Hamburg/events/266610252/).
+* [Dec 11. Berlin, DE - OpenTechSchool Berlin - Rust Hack and Learn](https://www.meetup.com/opentechschool-berlin/events/nxdpgryzqbpb/).
+* [Dec 12. Kyiv, UA - Rails Reactor - Rust Ukraine Meetup](https://www.facebook.com/events/1173477969528421/).
+* [Dec 12. Turin, IT - Mozilla Torino - Gruppo di studio Rust](https://www.meetup.com/Mozilla-Torino/events/266750624).
+* [Dec 16. Amsterdam, NL - Rust Nederland - Rust - Talks & Demos](https://www.meetup.com/Rust-Nederland/events/266888452/).
+
+### North America
+
+* [Dec 10. Seattle, WA, US - Seattle Rust Meetup - Monthly meetup](https://www.meetup.com/Seattle-Rust-Meetup/events/prbtdryzqbnb/).
+* [Dec 11. Mesa, AZ, US - Desert Rust - Rust: Crates and Organization](https://www.meetup.com/Desert-Rustaceans/events/wmmphryzpbkc/).
+* [Dec 11. Vancouver, BC, CA - Vancouver Rust meetup](https://www.meetup.com/Vancouver-Rust/events/rwcpfryzqbpb/).
+* [Dec 12. San Diego, CA, US - San Diego Rust December Meetup](https://www.meetup.com/San-Diego-Rust/events/266502136/).
+* [Dec 12. Columbus, OH, US - Columbus Rust Society - Monthly Meeting](https://www.meetup.com/columbus-rs/events/dpkhgryzqbqb/).
+* [Dec 12. Lehi, UT, US - Utah Rust - December 2019 Regular Meetup](https://www.meetup.com/utah-rust/events/265905262/).
+
+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
+
+*Tweet us at [@ThisWeekInRust](https://twitter.com/ThisWeekInRust) to get your job offers listed here!*
+
+# Quote of the Week
+
+> > Heard recently creative coding experience which rust gives. What about unconscious coding experience - do whatever you can to make your code compile as late as you can, then go sleep and find your code correct and working in the morning
+>
+> Woah, I know people say the Rust compiler is slow but I never had a Rust program that took all night to compile☺
+
+– [Maxim Vorobjov and ZiCog in our Quote of the Week Thread](https://users.rust-lang.org/t/twir-quote-of-the-week/328/749)
+
+Thanks to [both of them and mmmmib](https://users.rust-lang.org/t/twir-quote-of-the-week/328/752) 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>