k0kubun

We released Ruby 4.0.9, 3.4.12, and 3.3.13, and published an announcement about Regexp compilation fixes. www.ruby-lang.org/en/news/2026... If your application compiles a regular expression from an untrusted string, please update your Ruby to one of those versions.

Ruby 4.0.8 Released www.ruby-lang.org/en/news/2026... This is a routine update that includes bugfixes. We recommend upgrading your Ruby version at your earliest convenience.

Ruby 4.0.7 Released www.ruby-lang.org/en/news/2026... This is a routine update that includes bugfixes. We recommend upgrading your Ruby version at your earliest convenience.

Join me at @sfruby.com's Ruby Conference and get your pixel card too 👾 clouds.sfruby.com/e/2026-bits/...

> Message from general-purpose (ctrl+o to expand) > press ctrl+o > my launcher opens Slack

We'll present a paper about ZJIT at VMIL'26! conf.researchr.org/details/spla...

VMIL'26 has a program! Looks very interesting. Static Analysis, optimizing Android's GC, understanding R's benchmarks, optimizing Ruby, and lots more! The SPLASH early registration deadline is September 3rd! Program: conf.researchr.org/home/splash-...

A quick followup on Ruby Hashes byroot.github.io/ruby/perform...

Ruby 4.0.6 Released www.ruby-lang.org/en/news/2026... This is a routine update that includes bugfixes. We recommend upgrading your Ruby version at your earliest convenience.

ベイエリアのラーメン4選

We released Ruby 4.0.5 and published security advisory for CVE-2026-46727. If you use Ruby 4.0.0~4.0.4, we recommend updating your Ruby version to 4.0.5. www.ruby-lang.org/en/news/2026...

If you haven't upgraded yet, Ruby 4.0's garbage collection is generally much faster than 3.4. This patch release fixes the one area there had previously been a notable regression (allocating/freeing Classes).

Ruby 4.0.4 Released www.ruby-lang.org/en/news/2026... This is a routine update that includes bugfixes. We recommend upgrading your Ruby version at your earliest convenience.

Ruby 4.0.3 has been released. It updates ERB to 6.0.1.1 for CVE-2026-41316. If your application calls Marshal.load on untrusted data AND has both erb and activesupport loaded, please update your ERB version. You may update Ruby to 4.0.3 to do so. www.ruby-lang.org/en/news/2026...

Ruby 4.0.2 Released www.ruby-lang.org/en/news/2026... This is a routine update that includes a bugfix in YJIT for NoMethodError on Puma. We recommend upgrading your Ruby version at your earliest convenience.

Ruby 4.0.1 Released www.ruby-lang.org/en/news/2026... This release includes a bugfix for Kernel#sleep, along with other bugfixes. We recommend upgrading your Ruby version at your earliest convenience.

@k0kubun.com talked about ZJIT, the next generation of YJIT for Ruby 3.5. He explained how to use it to improve Ruby’s speed in Ruby and Rails infrastructures.

Ruby 3.4.8 Released www.ruby-lang.org/en/news/2025... This is a routine update that includes bug fixes. We recommend upgrading your Ruby version at your earliest convenience.

Happy 10th anniversary to md2key

Today is the last day to grab a GA ticket for SF Ruby! Read our new blog post for a preview: evilmartians.com/chronicles/w...

It was fun to create a cloud card. Join us at @sfruby.com next month! bsky.app/profile/inaz...

I tried to explain why I don't believe the recent accusations toward my former teammates, as well as how the Ruby and Rails Infra team at Shopify operates and why it can be trusted. byroot.github.io/opensource/r...

Ruby 3.4.7 Released ruby-lang.org/en/news/2025... This release contains a uri gem update for CVE-2025-61594, along with other bug fixes. We recommend updating your uri gem version. This release has been made for the convenience of those who wish to continue using it as a default gem.

Ruby 3.4.6 Released www.ruby-lang.org/en/news/2025... This is a routine update that includes bug fixes. We recommend upgrading your Ruby version at your earliest convenience.

Ruby 3.4.5 Released www.ruby-lang.org/en/news/2025... This is a routine update that includes bug fixes and GCC 15 support. We recommend upgrading your Ruby version at your earliest convenience.

years after working with a team that was vehemently against deleting any test, no matter how flaky, I have assembled my counter-doctrine: you should delete tests andre.arko.net/2025/06/30/y...

Ruby 3.4.4 Released www.ruby-lang.org/en/news/2025... This release includes a fix for a YJIT bug related to local variables and addresses a build issue on Windows when using GCC 15. It was released ahead of schedule to make these fixes available as soon as possible.

Ruby 3.4.3 Released www.ruby-lang.org/en/news/2025.... This is a routine update that includes bug fixes. We recommend upgrading your Ruby version at your earliest convenience.

Using Neovide made me realize that my Neovim (on tmux) on WezTerm showed wrong colors github.com/wezterm/wezt.... Combined with floatConfig changes I made on coc-settings today, I'm now satisfied with the UI of nvim on my terminal.

I'm trying out Neovide. It's beautiful enough that I'm considering switching from VSCode Neovim to it. But I also wish Neovim on a modern terminal looked like that in the first place.

The latest VSCode feels buggy with VSCode Neovim 😕 It often duplicates what I just entered.

After an incredible 6.5+ years, Friday was my last day at GitHub. I'm so thankful to have gotten to know and have worked with such a smart and thoughtful group of people. I'm excited to continue working on Ruby as part of the Ruby and Rails Infrastructure team at Shopify ❤️ 💎

今日も肉焼いてました

Ruby 3.4.2 Released www.ruby-lang.org/en/news/2025... This is a routine update that includes bug fixes. We recommend upgrading your Ruby version at your earliest convenience.

ChatGPT使う時にちょっと賢い奴欲しいなってなったら課金してて今はPlusあるんだけど、初歩的なところで間違った回答が返ってくることもあり、金払ってるのに渋いなという体験になりがち。逆に無料版は金払ってないのにやたら賢いという体験になる

The branch maintainers of Ruby have been updated. @k0kubun.com is the new maintainer of Ruby 3.4 that is latest stable version. I and @nagachika.bsky.social keep to maintain the old stable versions like 3.3, 3.2 and 3.1. #ruby bugs.ruby-lang.org/issues/21136

I wrote a blog post about how we can make FFI faster in CRuby railsatscale.com/2025-02-12-t...

Rust、/// の後の定義をコメントアウトすると /// の後に定義が来ないせいでコンンパイルエラーになるのやめて欲しい 流石にwarningレベルの問題でしょ…

今でこそグリーンカードあるけど、うちも子ができた時はnon-immigrant visaで滞在してたので、現政権下だと国籍もらえなそうなんだなあ

FIDO2対応してないサイトで2FAやるのだるすぎるんだけどどうにかならんもんか

いや～itそのまま出てくれてよかった

www.ruby-lang.org/en/news/2024...

ググってStackOverflowを眺めるんじゃなくてChatGPTに質問したら適切な答えが帰ってきてそれで直った。人間+インターネットよりAIの方が知性が高いし、Neovimは人間が使うには難しすぎる

coc.nvimのrust-analyzerの連携ある日突然動かなくなってしまって、Rustのファイル開く度にそれが壊れているメッセージが出て鬱陶しいので適当にググってrust-analyzerおよびcocプラグインを更新してみたところそれでは直らず。何もしてないのに何かが変わって壊れるNeovimと違って、普通に使ってるだけで動き続けるVSCodeは偉いなと思った

Rubyists, if you're testing Ruby 3.4 please upgrade Nokogiri to v1.18.0.rc1! github.com/sparklemotio... Here's some motivation: this release also has a big performance improvement in xpath/css searching. 🚀 #ruby

By the way, Google Translate (linked by Bluesky's "Translate") is still bad in 2024. Bluesky should switch to DeepL, or Google should power it with Gemini or something that doesn't suck.

I finally realized Bluesky has "Post language" setting. I thought "Translate" was not implemented on Bluesky, but it was just that it was set to English for all my past Japanese posts 😅

別に何かバズったわけでもないのに (必ずしも新規ユーザーではない人に) そこそこの量フォロー増えたな。既存ユーザーのフォローを促すような何かがあったんだろうか