Ruby Issue Tracking System

08/03/2026

09:14 PM Ruby Bug #22217: Segmentation fault when resuming execution with `Coverage.start` and ruby/debug

[Backport PR](https://github.com/ruby/ruby/pull/18184). luke-gru (Luke Gruber)

06:57 PM Ruby Bug #22217: Segmentation fault when resuming execution with `Coverage.start` and ruby/debug

Thanks for the report and minimal repro, it was very helpful. I have a [PR](https://github.com/ruby/ruby/pull/18182). This will be fixed in 4.0.7 (released some time in September). The affected version are 4.0.0 - 4.0.6. luke-gru (Luke Gruber)

08:27 PM Ruby Bug #22224: YJIT: rb_yjit_invalidate_ep_is_bp takes the VM lock stopping Ractors on every Proc materialization; multi-Ractor throughput collapses (up to ~150x)

The PR is [here](https://github.com/ruby/ruby/pull/18176). I've also marked this as needing a backport because this really is a bug, it can slow down Ractors a lot. luke-gru (Luke Gruber)

03:27 PM Ruby Bug #22225: YJIT regenerates a branch while a duplicate target still points to the invalidated block

Thank you for the report and the great repro. This does look like a bug to me. The YJIT folks will take a look at it soon. luke-gru (Luke Gruber)

03:23 PM Ruby Bug #22220: Performance regression when requiring `aws-sdk-ec2` in Ruby 4.0.6

cc @viralpraxis luke-gru (Luke Gruber)

07/30/2026

09:42 PM Ruby Bug #22220: Performance regression when requiring `aws-sdk-ec2` in Ruby 4.0.6

Seems caused by [1f473ed633a364f8c89b69a76adfb22a4bf21f96](https://github.com/ruby/ruby/commit/1f473ed633a364f8c89b69a76adfb22a4bf21f96) luke-gru (Luke Gruber)

07/28/2026

06:19 PM Ruby Bug #22211: Fiber::Scheduler stalls on Ractor::Port.receive

The tricky part in integrating the fiber scheduler with `Ractor::Port` `send/receive` is what to do when you want to wakeup (unblock) a fiber on another Ractor. Normally unblocking a fiber is done on the same Ractor and it's done in a co... luke-gru (Luke Gruber)

07/16/2026

02:33 AM Ruby Bug #22188: addr2line doesn't find symbols when compiled with GCC LTO

In my opinion this deserves a backport. We are using LTO in production in some of our apps (Ruby 4.0.x) and not having backtraces makes debugging considerably harder. [PR here](https://github.com/ruby/ruby/pull/17744). luke-gru (Luke Gruber)

07/02/2026

01:09 PM Ruby Bug #22099: Keyword-only method silently accepts a positional argument

I created a [PR](https://github.com/ruby/ruby/pull/17581). It's currently being reviewed. luke-gru (Luke Gruber)

06/29/2026

07:30 PM Ruby Bug #22104: Segfault in PRISM while Bootsnap compiles aws-sdk client_api.rb

[Backport PR](https://github.com/ruby/ruby/pull/17561) :) luke-gru (Luke Gruber)