adds in draft for 349

Signed-off-by: Nell Shamrell <[email protected]>

Author: nellshamrell

draft/2020-07-28-this-week-in-rust.md

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+Title: This Week in Rust 349
+Number: 349
+Date: 2020-07-28
+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).
+
+Check out [this week's *This Week in Rust Podcast*](https://rustacean-station.org/episode/023-twir-348/)
+
+# Updates from Rust Community
+
+## News & Blog Posts
+
+# Crate of the Week
+
+This week's crate is [pre](https://github.com/aticu/pre), a library for declaring and checking the assurance of precondition, useful for unsafe functions.
+
+Thanks to [Zicklag](https://users.rust-lang.org/t/crate-of-the-week/2704/792) 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.
+
+
+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
+
+394 pull requests were [merged in the last week][merged]
+
+[merged]: https://github.com/search?q=is%3Apr+org%3Arust-lang+is%3Amerged+merged%3A2020-07-13..2020-07-20
+
+* [do not try fetching the ancestors of errored trait impls](https://github.com/rust-lang/rust/pull/74516)
+* [only skip impls of foreign unstable traits](https://github.com/rust-lang/rust/pull/74534)
+* [don't assign `()` to `!` MIR locals](https://github.com/rust-lang/rust/pull/74411)
+* [some `Symbol` related improvements](https://github.com/rust-lang/rust/pull/74357)
+* [use `ArrayVec` in `SparseBitSet`](https://github.com/rust-lang/rust/pull/74310)
+* [change `SymbolName::name` to a `&str`](https://github.com/rust-lang/rust/pull/74214)
+* [enforce the static symbol order](https://github.com/rust-lang/rust/pull/74203)
+* [reduce the amount of interning and `layout_of` calls in const eval](https://github.com/rust-lang/rust/pull/74202)
+* [add `Arguments::as_str()`](https://github.com/rust-lang/rust/pull/74056)
+* [`impl Index<RangeFrom> for CStr`](https://github.com/rust-lang/rust/pull/74021)
+* [add (unchecked) indexing methods to raw (and NonNull) slices](https://github.com/rust-lang/rust/pull/73986)
+* [make some `Option` methods const](https://github.com/rust-lang/rust/pull/73930)
+* [use `step_unchecked` more liberally in range iter impls](https://github.com/rust-lang/rust/pull/73490)
+* [add `core::task::ready!` macro](https://github.com/rust-lang/rust/pull/70817)
+* [backtrace: use noop backends on Miri](https://github.com/rust-lang/backtrace-rs/pull/360)
+* [stdarch: update and revamp wasm32 SIMD intrinsics](https://github.com/rust-lang/stdarch/pull/874)
+* [stdarch: implement AVX512f floating point comparisons](https://github.com/rust-lang/stdarch/pull/869)
+* [stdarch: constify all x86 `rustc_args_required_const` intrinsics](https://github.com/rust-lang/stdarch/pull/876)
+* [make `unreachable_unchecked` a const fn](https://github.com/rust-lang/rust/pull/74459)
+* [cargo: fix freshness checks for build scripts on renamed dirs](https://github.com/rust-lang/cargo/pull/8497)
+* [crates.io: generate API tokens with a secure RNG, store hashed](https://github.com/rust-lang/crates.io/pull/2637)
+* [add Ayu theme to rustdoc](https://github.com/rust-lang/rust/pull/71237)
+* [clippy: `unnecessary_sort_by`: avoid linting if key borrows](https://github.com/rust-lang/rust-clippy/pull/5756)
+
+## Rust Compiler Performance Triage
+
+* [2020-07-21](https://github.com/rust-lang/rustc-perf/blob/master/triage/2020-07-21.md).
+  A disastrous week. At least 7 regressions. 3 improvements. Lots of murkiness due to rollups.
+
+## 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)
+
+* [RFC: 'C unwind' ABI](https://github.com/rust-lang/rfcs/pull/2945)
+
+### [Tracking Issues & PRs](https://github.com/rust-lang/rust/labels/final-comment-period)
+
+* [disposition: merge] [Stabilize core::future::{pending,ready}](https://github.com/rust-lang/rust/pull/74328)
+* [disposition: merge] [Make more primitive integer methods const](https://github.com/rust-lang/rust/pull/73858)
+* [disposition: merge] [Derive common traits for panic::Location](https://github.com/rust-lang/rust/pull/73583)
+
+## New RFCs
+
+* [Add `oneof` configuration predicate to support exclusive features](https://github.com/rust-lang/rfcs/pull/2962)
+* [RFC: Promote aarch64-unknown-linux-gnu to a Tier-1 Rust target](https://github.com/rust-lang/rfcs/pull/2959)
+* [Add Drop::poll_drop_ready for asynchronous destructors](https://github.com/rust-lang/rfcs/pull/2958)
+* [Stabilize Cargo's new feature resolver](https://github.com/rust-lang/rfcs/pull/2957)
+* [Add the partial-closure-args RFC](https://github.com/rust-lang/rfcs/pull/2956)
+
+# Upcoming Events
+
+### Online
+* [July 23. Berlin, DE - Rust Hack and Learn](https://www.meetup.com/opentechschool-berlin/events/txcprrybckbfc/) 
+* [July 27 - August 2. Rusty Days Virtual Rust Conference](https://rusty-days.org/)
+
+### North America
+* [July 27. Durham, NC, US - Triangle Rustaceans - Project Night & Lightning Talks](https://www.meetup.com/triangle-rustaceans/events/mfglwpybckbkc/)
+* [July 28. Dallas, TX, US - Dallas Rust - Last Tuesday](https://www.meetup.com/Dallas-Rust/events/nppvrrybckblc/)
+
+### Asia Pacific
+* [August 3. Auckland, NZ - Rust ALK - Rust Meetup](https://www.meetup.com/rust-akl/events/266876693/)
+
+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:[email protected]
+
+# Rust Jobs
+
+*Tweet us at [@ThisWeekInRust](https://twitter.com/ThisWeekInRust) to get your job offers listed here!*
+
+# Quote of the Week
+
+> `unsafe` Rust is all about flirting with UB but never giving in.
+
+– [Ralf Jung on Zulip](https://rust-lang.zulipchat.com/#narrow/stream/136281-t-lang.2Fwg-unsafe-code-guidelines/topic/Language.20UB.20vs.20library.20UB/near/204212193)
+
+Thanks to [HeroicKatora](https://users.rust-lang.org/t/twir-quote-of-the-week/328/913) for the suggestions!
+
+[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: [nellshamrell](https://github.com/nellshamrell), [llogiq](https://github.com/llogiq), and [cdmistman](https://github.com/cdmistman).*
+
+<small>[Discuss on r/rust](https://www.reddit.com/r/rust/comments/hvjf4i/this_week_in_rust_348/)small>