adds in draft for 386, sets up 385 for publish

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

Author: nellshamrell

draft/2021-04-07-this-week-in-rust.md renamed to content/2021-04-07-this-week-in-rust.md

@@ -0,0 +1,249 @@
+Title: This Week in Rust 385
+Number: 385
+Date: 2021-04-07
+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/rust-lang/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/rust-lang/this-week-in-rust).
+If you find any errors in this week's issue, [please submit a PR](https://github.com/rust-lang/this-week-in-rust/pulls).
+
+# Updates from Rust Community
+
+No papers/research projects this week.
+
+### Official
+* [Inside] [Core Team updates](https://blog.rust-lang.org/inside-rust/2021/04/03/core-team-updates.html)
+* [Foundation] [Introducing Peixin Hou](https://foundation.rust-lang.org/posts/2021-04-08-introducing-peixin-hou/)
+* [Foundation] [Introducing Florian Gilcher](https://foundation.rust-lang.org/posts/2021-04-08-introducing-florian-gilcher/)
+
+### Newsletters
+* [This Month in Rust OSDev (March 2021)](https://rust-osdev.com/this-month/2021-03/)
+* [RiB Newsletter #22 - A few tweaks](https://www.reddit.com/r/rust/comments/mhmfu9/rib_newsletter_22_a_few_tweaks/)
+
+### Project/Tooling Updates
+* [GCC Rust Monthly Report #4 March 2021](https://thephilbert.io/2021/04/02/gcc-rust-monthly-report-4-march-2021/)
+* [mrustc upgrade: rustc 1.39.0](https://www.reddit.com/r/rust/comments/mjxbaz/mrustc_upgrade_rustc_1390/)
+* [rust-analyzer Changelog #71](https://rust-analyzer.github.io/thisweek/2021/04/05/changelog-71.html)
+* [A new Left Recursive PEG Parser Generator for rust](https://www.mess.org/2021/03/26/Left-Recursive-PEG-Parser-Generator/)
+* [Last Month in Flott (Motion Control Toolkit in Rust) - April 2021](https://flott-motion.org/news/last-month-in-flott-april-2021/)
+* [Recent updates in IntelliJ Rust](https://blog.jetbrains.com/rust/2021/04/08/intellij-rust-updates-for-2021-1/)
+* [Bevy 0.5](https://bevyengine.org/news/bevy-0-5/)
+
+### Observations/Thoughts
+* [Interfacing a low-level actor system to Rust async/await, part 1](https://uazu.github.io/blog/20210406.html)
+* [A Tour of Safe Tracing GC Designs in Rust](https://manishearth.github.io/blog/2021/04/05/a-tour-of-safe-tracing-gc-designs-in-rust/)
+* [How I Used Rust + Lunatic to Build a TelNet Chat Server with WebAssembly](https://www.hackernoon.com/how-i-used-rust-lunatic-to-build-a-telnet-chat-server-with-webassembly-rb3l33cg)
+* [Eliminating Data Races in Firefox - A Technical Report](https://hacks.mozilla.org/2021/04/eliminating-data-races-in-firefox-a-technical-report/)
+* [First-class IO](https://blog.sunfishcode.online/first-class-io/)
+* [The modern packager's security nightmare](https://blogs.gentoo.org/mgorny/2021/02/19/the-modern-packagers-security-nightmare/)
+* [Ordering Requests to Accelerate I/O](https://pkolaczk.github.io/disk-access-ordering/)
+* [An essay of checked exceptions in Rust](https://users.rust-lang.org/t/an-essay-of-checked-exceptions-in-rust/57769)
+* [Weird architectures weren't supported to begin with](https://blog.yossarian.net/2021/02/28/Weird-architectures-werent-supported-to-begin-with)
+* [video] [I tried learning OpenGL in 7 days - using Rust](https://youtu.be/KEQIWqSq42k)
+
+### Rust Walkthroughs
+* [How we built our Python Client that's mostly Rust](https://www.fluvio.io/blog/2021/03/python-client/)
+* [Hello world with KAS GUI](https://kas-gui.github.io/tutorials/hello.html)
+* [How to create small Docker images for Rust](https://kerkour.com/blog/rust-small-docker-image/)
+* [Oxidizing the Kubernetes Operator](https://www.pavel.cool/rust/rust-kubernetes-operators/)
+* [Sending tuples from Node to Rust and back](https://www.fluvio.io/blog/2021/04/node-bindgen-tuples/)
+* [Getting started with Kafka and Rust: Part 1](https://dev.to/abhirockzz/getting-started-with-kafka-and-rust-part-1-4hkb)
+* [A Beginner's Guide to Handling Errors in Rust](https://dev.to/seanchen1991/a-beginner-s-guide-to-handling-errors-in-rust-40k2)
+* [Using Seahorn](https://project-oak.github.io/rust-verification-tools/using-seahorn/)
+* [Asynchronous streams in Rust (part 1) - Futures, buffering and mysterious compilation error messages](https://gendignoux.com/blog/2021/04/01/rust-async-streams-futures-part1.html)
+* [series] [What would SQLite look like if written in Rust? — Part 3](https://medium.com/the-polyglot-programmer/what-would-sqlite-look-like-if-written-in-rust-part-3-edd2eefda473)
+* [video] [Return a value from a function in Rust](https://www.youtube.com/watch?v=YNSg7g46Hso)
+* [video] [Crust of Rust: Atomics and Memory Ordering](https://youtu.be/rMGWeSjctlY)
+* [video] [Async/Await in Rust: Introduction](https://youtu.be/FNcXf-4CLH0)
+* [video] [OpenVehicleDiag Rust live coding with Macchina's A0!!](https://youtu.be/zjAe-uvKMJ4)
+* [video] [series] [Easy Rust - learn to program in Rust with simple English](https://youtube.com/playlist?list=PLfllocyHVgsRwLkTAhG0E-2QxCf-ozBkk)
+
+### Miscellaneous
+* [best-of-ml-rust: A ranked list of awesome machine learning Rust libraries](https://github.com/e-tony/best-of-ml-rust)
+* [Rust in the Android platform](https://security.googleblog.com/2021/04/rust-in-android-platform.html)
+* [David Tolnay - thank you](https://www.reddit.com/r/rust/comments/mify2o/david_tolnay_thank_you/)
+* [My "shiny future"](https://smallcultfollowing.com/babysteps/blog/2021/04/02/my-shiny-future/)
+
+# Crate of the Week
+
+This week's crate is [rs-pbrt](https://crates.io/crates/rs_pbrt), a counterpart to the PBRT book's (3rd edition) C++ code.
+
+Thanks to [Jan Walter](https://users.rust-lang.org/t/crate-of-the-week/2704/900) 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.
+
+* [dotenv-linter has several good first issues](https://github.com/dotenv-linter/dotenv-linter/issues?q=is%3Aissue+is%3Aopen+label%3A%22good+first+issue%22)
+
+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
+
+313 pull requests were [merged in the last week][merged]
+
+[merged]: https://github.com/search?q=is%3Apr+org%3Arust-lang+is%3Amerged+merged%3A2021-03-29..2021-04-05
+
+* [fix stack overflow detection on FreeBSD 11.1+](https://github.com/rust-lang/rust/pull/83771)
+* [disallow the use of high byte registes as operands on `x86_64`](https://github.com/rust-lang/rust/pull/83853)
+* [resolve/expand: cache intermediate results of `#[derive]` expansion](https://github.com/rust-lang/rust/pull/82907)
+* [panic early when `TrustedLen` indicates a `length > usize::MAX`](https://github.com/rust-lang/rust/pull/83726)
+* [suggest `box`/`pin`/`arc`ing receiver on method calls](https://github.com/rust-lang/rust/pull/83667)
+* [run LLVM coverage instrumentation passes before optimization passes](https://github.com/rust-lang/rust/pull/83666)
+* [simplify logical operations CFG](https://github.com/rust-lang/rust/pull/83663)
+* [remove unneeded type resolving](https://github.com/rust-lang/rust/pull/83839)
+* [unaligned_references: `align(N)` fields in `packed(N)` structs are fine](https://github.com/rust-lang/rust/pull/83605)
+* [prevent very long compilation runtimes in `LateBoundRegionNameCollector`](https://github.com/rust-lang/rust/pull/83406)
+* [reduce the impact of `Vec::reserve` calls that do not cause any allocation](https://github.com/rust-lang/rust/pull/83357)
+* [BTree: no longer search arrays twice to check `Ord`](https://github.com/rust-lang/rust/pull/83267)
+* [stream the dep-graph to a file instead of storing it in-memory](https://github.com/rust-lang/rust/pull/82780)
+* [implement `SourceIterator` and `InPlaceIterable` for `ResultShunt`](https://github.com/rust-lang/rust/pull/81619)
+* [optimize jumps in `PartialOrd::le`](https://github.com/rust-lang/rust/pull/83819)
+* [`ffi::c_str` removed bound checks on `as_bytes`, `to_bytes`](https://github.com/rust-lang/rust/pull/83609)
+* [added `as_slice` method to `BinaryHeap` collection](https://github.com/rust-lang/rust/pull/82331)
+* [use `#[inline(always)]` on trivial `UnsafeCell` methods](https://github.com/rust-lang/rust/pull/83858)
+* [add `#[inline]` to `IpAddr` methods](https://github.com/rust-lang/rust/pull/83831)
+* [disallow octal format in Ipv4 string](https://github.com/rust-lang/rust/pull/83652)
+* [constify methods of `std::net::SocketAddr`, `SocketAddrV4` and `SocketAddrV6`](https://github.com/rust-lang/rust/pull/82487)
+* [constify some slice methods](https://github.com/rust-lang/rust/pull/83571)
+* [stdsimd: add saturating abs/neg](https://github.com/rust-lang/stdsimd/pull/87)
+* [hashbrown: make `RawTable::insert_no_grow` unsafe](https://github.com/rust-lang/hashbrown/pull/254)
+* [cargo: add cargo config subcommand](https://github.com/rust-lang/cargo/pull/9302)
+* [rustdoc: only look at blanket impls in `get_blanket_impls`](https://github.com/rust-lang/rust/pull/83681)
+* [rustdoc: add unstable option to only emit shared/crate-specific files](https://github.com/rust-lang/rust/pull/83478)
+* [rustdoc: don't enter an `infer_ctxt` in `get_blanket_impls` for impls that aren't blanket impls](https://github.com/rust-lang/rust/pull/82864)
+* [rustdoc: highlight macros more efficiently](https://github.com/rust-lang/rust/pull/83793)
+* [clippy: add `non_octal_unix_permissions` lint](https://github.com/rust-lang/rust-clippy/pull/7001)
+* [clippy: don't lint `manual_map` in const functions](https://github.com/rust-lang/rust-clippy/pull/6976)
+* [clippy: new Lint: `needless_for_each`](https://github.com/rust-lang/rust-clippy/pull/6706)
+* [clippy: new Lint: `branches_sharing_code`](https://github.com/rust-lang/rust-clippy/pull/6463)
+* [clippy: lint: `filter(Option::is_some).map(Option::unwrap)`](https://github.com/rust-lang/rust-clippy/pull/6342)
+* [clippy: remove author requirement for `cargo_common_metadata`](https://github.com/rust-lang/rust-clippy/pull/7026)
+* [Clippy going dark: adding a dark theme to Clippy's lint list](https://github.com/rust-lang/rust-clippy/pull/7030)
+* [crates.io: topologically sort `db-dump.tar.gz`](https://github.com/rust-lang/crates.io/pull/3409)
+* [parallelize tidy](https://github.com/rust-lang/rust/pull/82347)
+
+## Rust Compiler Performance Triage
+
+A pretty major week for [memory usage improvements] with an average of ~20% gains on memory usage for
+release builds, and 5% on check builds, due to an update in the default allocator
+used (to a more recent jemalloc). Wall time performance remained largely unchanged over this week.
+
+Triage done by **@simulacrum**.
+Revision range: [4896450e..d32238](https://perf.rust-lang.org/?start=4896450e7e0a522486b4d3a8d360ac4e1d2072a0&end=d32238532138485c80db4f2cd596372bce214e00&absolute=false&stat=instructions%3Au)
+
+[memory usage improvements]: https://perf.rust-lang.org/?start=4896450e7e0a522486b4d3a8d360ac4e1d2072a0&end=d32238532138485c80db4f2cd596372bce214e00&absolute=false&stat=max-rss
+
+1 Regressions, 4 Improvements, 0 Mixed
+
+## 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:
+
+* [RFC: Declarative macro metavariable expressions](https://github.com/rust-lang/rfcs/pull/3086)
+
+## 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: close] [RFC: Structural Records](https://github.com/rust-lang/rfcs/pull/2584)
+* [disposition: postpone] [Hygiene opt-out (escaping) for declarative macros 2.0](https://github.com/rust-lang/rfcs/pull/2498)
+* [disposition: postpone] [RFC: Delegation](https://github.com/rust-lang/rfcs/pull/2393)
+* [disposition: close] [RFC: `#[derive_no_bound(..)]` and `#[derive_field_bound(..)]`](https://github.com/rust-lang/rfcs/pull/2353)
+* [disposition: postpone] [RFC: Eager Macro Expansion](https://github.com/rust-lang/rfcs/pull/2320)
+* [disposition: merge] [try_trait_v2: A new design for the `?` desugaring](https://github.com/rust-lang/rfcs/pull/3058)
+
+### [Tracking Issues & PRs](https://github.com/rust-lang/rust/labels/final-comment-period)
+
+* [disposition: merge] [Remove `T: Debug` bound on UnsafeCell Debug impl](https://github.com/rust-lang/rust/pull/83707)
+* [disposition: merge] [Turn old edition lint (anonymous-parameters) into warn-by-default on 2015](https://github.com/rust-lang/rust/pull/82918)
+* [disposition: merge] [Stabilize `rustdoc::bare_urls` lint](https://github.com/rust-lang/rust/pull/81764)
+* [disposition: merge] [Tracking issue: fNN::is_subnormal](https://github.com/rust-lang/rust/issues/79288)
+* [disposition: merge] [Tracking Issue for feature(nonzero_leading_trailing_zeros)](https://github.com/rust-lang/rust/issues/79143)
+* [disposition: merge] [Tracking Issue for `{BTreeMap,BTreeSet}::retain`](https://github.com/rust-lang/rust/issues/79025)
+* [disposition: merge] [Tracking Issue for `#![feature(const_cell_into_inner)]`](https://github.com/rust-lang/rust/issues/78729)
+* [disposition: merge] [Tracking Issue for `atomic_fetch_update`](https://github.com/rust-lang/rust/issues/78639)
+* [disposition: merge] [Tracking Issue for feature: "option_insert"](https://github.com/rust-lang/rust/issues/78271)
+* [disposition: merge] [Tracking Issue for `Duration` saturating operations](https://github.com/rust-lang/rust/issues/76416)
+* [disposition: merge] [Tracking Issue for `Duration::{zero, is_zero} (#![feature(duration_zero)])`](https://github.com/rust-lang/rust/issues/73544)
+* [disposition: close] [Tracking issue for FixedSizeArray trait](https://github.com/rust-lang/rust/issues/27778)
+
+## New RFCs
+
+* [RFC: Reserved prefixes in the 2021 edition](https://github.com/rust-lang/rfcs/pull/3101)
+
+# Upcoming Events
+
+### Online
+* [April 7, Johannesburg, ZA - Monthly Joburg Rust Chat! - Johannesburg Rust Meetup](https://www.meetup.com/Johannesburg-Rust-Meetup/events/277133126/)
+* [April 7, Indianapolis, IN, US - Indy.rs - with Social Distancing - Indy Rust](https://www.meetup.com/indyrs/events/jhfstryccgbkb/)
+* [April 12, Denver, CO, US - Building Delightful CLI Tools in Rust by Chuck Pierce - Rust Denver](https://www.meetup.com/Rust-Boulder-Denver/events/276801410/)
+* [April 13, Seattle, WA, US - Monthly Meetup - Seattle Rust Meetup](https://www.meetup.com/Seattle-Rust-Meetup/events/gskksryccgbrb/)
+* [April 13, Saarbrücken, Saarland, DE - **Rust Saar** 10u16](https://www.meetup.com/de-DE/Rust-Saar/events/276873622/)
+* [April 20, Washington, DC, US - The Rust Borrow Checker—A Deep Dive - Rust DC](https://www.meetup.com/RustDC/events/ntvrgsyccgblb)
+
+### North America
+
+* [April 8, Columbus, OH, US - Monthly Meetup - Columbus Rust Society](https://www.meetup.com/columbus-rs/events/dpkhgryccgblb/)
+* [April 14, Atlanta, GA, US - Grab a beer with fellow Rustaceans - Rust Atlanta](https://www.meetup.com/Rust-ATL/events/qxqdgryccgbsb/)
+
+### Asia Pacific
+* [April 19, Wellington, NZ - IGNITION: What is Rust and why should I care? Rust at work & at play - Rust Wellington](https://www.meetup.com/Rust-Wellington/events/277270667)
+
+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
+
+**IOTA Foundation**
+
+* [IOTA Identity Software Engineer - Rust (Remote)](https://iota.bamboohr.com/jobs/view.php?id=143&source=other)
+
+**Parity Technologies**
+
+* [Blockchain Developer - Cross Chain Messaging (Remote)](https://grnh.se/9aec49883us)
+* [Numerous other Rust engineering openings](https://www.parity.io/jobs/)
+
+**Microsoft**
+
+* [Azure IoT Senior Software Engineer (remote possible within U.S.)](https://careers.microsoft.com/us/en/job/960784/Senior-Software-Engineer)
+    * Junior developers should also apply but relocation to Redmond is necessary in that case.
+
+**Wallaroo**
+
+* [Software Engineer (Remote)](https://wallaroo.breezy.hr/p/30939dc4e5c7-software-engineer)
+
+*Tweet us at [@ThisWeekInRust](https://twitter.com/ThisWeekInRust) to get your job offers listed here!*
+
+# Quote of the Week
+
+Sadly there was no quote nominated for this week.
+
+[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/k5nsab/this_week_in_rust_367/)</small>