Ruby Issue Tracking System

Today

10:50 AM Ruby Bug #22173: `Ractor.new { Fiber.current }.value` raises `[BUG] rb_ractor_confirm_belonging object-ractor id:1, current-ractor id:2`

Confirmed https://github.com/ruby/ruby/commit/f5ef758a756b325208c9d052326bb64239e4b1aa fixed the second one.
```
$ ruby -ve 'Fiber[:x] = Object.new; Ractor.new { Fiber[:x].class }.value'
ruby 4.1.0dev (2026-07-03T01:34:54Z master f5... yahonda (Yasuo Honda)

07/02/2026

10:23 AM Ruby Bug #22173 (Open): `Ractor.new { Fiber.current }.value` raises `[BUG] rb_ractor_confirm_belonging object-ractor id:1, current-ractor id:2`

This issue is originally found at https://github.com/rails/rails/issues/57954
### Steps to reproduce
1. Build ruby with `-DRUBY_DEBUG=1` enabled like
```
#!/bin/bash
cd ${HOME}/src/github.com/ruby/ruby
make clean
make dist... yahonda (Yasuo Honda)

05/14/2026

05:34 AM Ruby Revision 9f170caf (git): [ruby/rubygems] Skip git source exclusion when lockfile cannot backfill

The git source exclusion in `find_source_requirements` introduced by
ruby/rubygems#9234 relies on `locked_requirements` to backfill the gap
for sources used only by --without groups. Without a Gemfile.lock —
e.g. an initial `BUNDLE_ONLY=... yahonda (Yasuo Honda)

04/21/2026

07:02 AM Ruby Bug #22009: ERROR: AddressSanitizer: attempting to call malloc_usable_size() for pointer which is not owned: with ASAN and DEBUG enabled build

With Claude Code help, It only reproduces with both ASAN and DEBUG options enabled. But not sure if this is the right fix though.
https://github.com/ruby/ruby/commit/e47063e5bc52929924b633cffed33fc9132030c4 yahonda (Yasuo Honda)

07:00 AM Ruby Bug #22009: ERROR: AddressSanitizer: attempting to call malloc_usable_size() for pointer which is not owned: with ASAN and DEBUG enabled build

Here is the entire log generated by `make test-spec MSPECOPT="spec/ruby/library/objectspace/dump_all_spec.rb" 2>&1 | tee error.log` yahonda (Yasuo Honda)

06:58 AM Ruby Bug #22009 (Closed): ERROR: AddressSanitizer: attempting to call malloc_usable_size() for pointer which is not owned: with ASAN and DEBUG enabled build

### Background
I am using ruby-head built and deployed by https://github.com/ruby/ruby-dev-builder for my repository.
https://github.com/rsim/oracle-enhanced/blob/master/.github/workflows/ruby_head.yml
Recently, the `ruby-head` ve... yahonda (Yasuo Honda)

12/03/2025

09:38 AM Ruby Bug #21761: NameError: uninitialized constant only when RUBY_BOX=1

It does not reproduce without Rake.
```ruby
$ RUBY_BOX=1 ruby test_box.rb
ruby: warning: Ruby::Box is experimental, and the behavior may change in the future!
See doc/language/box.md for known issues, etc.
Constants defined:
R... yahonda (Yasuo Honda)

09:37 AM Ruby Bug #21761: NameError: uninitialized constant only when RUBY_BOX=1

Here are original issue found.
# Steps to reproduce
```
git clone https://github.com/rails/rails
cd rails/activerecord
rm ../Gemfile.lock
bundle install
RUBY_BOX=1 bundle exec rake test
```
# Actual behavior
```
$ RUBY_BOX... yahonda (Yasuo Honda)

09:36 AM Ruby Bug #21761 (Assigned): NameError: uninitialized constant only when RUBY_BOX=1

This issue is originally found when I tested Ruby::Box against Rails main branch, I think I have created a repro.
### Steps to reproduce
1. Install Ruby master branch
2. Follow these steps below.
```
git clone https://github.c... yahonda (Yasuo Honda)

11/12/2025

01:14 AM Ruby Revision da114dfe (git): [ruby/error_highlight] Replace Ruby 3.5 with Ruby 4.0

This commit updates the Ruby version to follow the commit in Ruby master branch.
https://github.com/ruby/ruby/commit/6d81969b475262aba251e99b518181bdf7c5a523
https://github.com/ruby/error_highlight/commit/dcecf68d75 yahonda (Yasuo Honda)