starting work next week… hopefully i remember how to program

121 years of the greatest subway in the world ! #subwayday

khadija al hanafi set was insane last night

trying to make sense of ocaml modules and their conceptual relationship to rust traits... rust essentially enables "module inference" which i think is neat, especially thinking about what constraints this requires compared to ocaml where modules need to be named directly in functors

I wrote about this sort of corporate mis-allocation of maintainer roles a while back and it's tragic to see such a vivid example. Let maintainers be maintainers! graydon2.dreamwidth.org/306832.html

Today’s my last day at AWS working on the Rust compiler. Unfortunately, back in July I received notice that I had to choose between moving to Boston from NYC, or leaving the company due to RTO policy. I unfortunately couldn’t abandon the city I plan on being my long term home.

coding interviews are a joke and i'm gonna be so pissed if i can't get a job because i don't know how to find some "trick" to solve some toy problem that has nothing to do with developing and maintaining a massively complex compiler codebase, which is a thing that i *am* actually good at doing.

I wrote a blog post sophiebits.com/2025/07/21/t...

github.com/rust-lang/ru... is the beginning of a fix for all the nonsense lifetime errors you probably encounter when writing async code in Rust that heavily uses lifetimes. github.com/rust-lang/ru... If you've ever hit any of these issues, I'd like your feedback when that PR lands.

Howdy all. I'm unfortunately not going to be with my employer for much longer due to team relocation. If anyone has any info on roles that would allow me to continue my Rust compiler work (in New York City), they'd be greatly appreciated.

don't talk to me or my son ever again

On my way back home after RustWeek 2025. So, so proud that we hosted the Rust Project All-Hands, the 10 years of Rust celebration, and the biggest Rust conference yet. See you all next year! Thanks to my co-organizers Jana, Laura, @tertsdiepraam.bsky.social and @mara.bsky.social ❤️ #rustlang #rust

Live from the 10 Years of Rust celebration in Utrecht, Netherlands, we are very happy to announce a new version of Rust, 1.87.0! See the blog post and release notes for all the details! blog.rust-lang.org/2025/05/15/R...

I feel like the work i did to improve diagnostics in github.com/rust-lang/ru... is paying off a lot now. I see it all the time. We now report "purely additive" typo fixes for things like methods using an inline syntax that highlights what to *add*, rather than the whole identifier.

how the heck do i write a conference talk

A new subway diagram has arrived! MTA leadership (including MTA Chair and CEO Janno Lieber and Chief Customer Officer Shanifah Rieara) unveiled a reimagined subway map, its first new design in half a century. Check out the new map on digital screens in stations, and as it rolls out on train cars 🚇

** Speaker announcement ** Catch this talk at RustWeek 2025! Speaker: Michael "compiler-errors" Goulet / @errs.io Title: (Almost) Everything You Should Know About The Compiler Frontend Info & tickets: rustweek.org/talks/errs/ See you in Utrecht 13-17 May, 2025! #rustweek #rustlang

soooo this. I started into the abyss so much, I can only see the abyss now

onlyny.com has the coolest mta shirt yall

Smashing success, thanks to the G mafia that came out to celebrate 📸: @jeremyzorek.bsky.social, me x2

I contributed quite a few things to this release, including async closures and lots of parts of Edition 2024. I'm glad that it's finally out 💖🦀

No I don't want AI generated PRs on my repository thank you very much

i should stop working on public-facing features. i'm going to lock myself in a monastery and only refactor decrepit deeply-internal compiler apis that nobody can have opinions.

lots of existential dread recently i'd like to work on rust in peace pls :>

oh hello

What did I do in December in rustc? hackmd.io/@compiler-er...

Async closures went from (practically) unimplemented to stabilized (on nightly) in approximately a year. Hopefully they'll land fully stable in 1.85, and I hope they help solve some of your async problems. github.com/rust-lang/ru...

What did I do in rustc in November? hackmd.io/@compiler-er...

Wow! The new trait solver now fully builds the Rust compiler. Huge milestone. Now comes the long tail of getting all the *other* crates in the world to compile too :) github.com/rust-lang/ru...

Please enjoy this animation of peak hour MTA subway service (by u/mtdfan)

love the confidence boost (not) when you discover an unsoundness in a change you made a *year* ago

hackmd.io/@compiler-er... I'm trying to keep better track of what I'm doing, so I wrote a "blog" "post" that summarizes most of what I did in October.

github.com/rust-lang/ru... 👀

Spent the last few days hyperfocusing on how to represent and validate const traits intuitively in the compiler, and I'm super satisfied with the output (though this PR is still some ways from landing): github.com/rust-lang/ru... Very excited for the future of const traits in Rust.

the implementation of `async` closures in Rust (i.e. `async |url: &str| { .. do_something(url).await?; }` is Really Hard to get right. brain hurts

`async gen` blocks in rustc aren't too hard to implement. github.com/rust-lang/ru...