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10:38 AM Ruby Revision 863c8656 (git): [ruby/openssl] Document syswrite_nonblock opts and symbol return value

https://github.com/ruby/openssl/commit/6339db4386 zonuexe (Kenta USAMI)

05/21/2026

11:26 AM Ruby Revision 81c68150 (git): [ruby/strscan] Fix call-seq return values

(https://github.com/ruby/strscan/pull/207)
Some `call-seq` comments did not match the actual return values
(documentation only, no behavior change):
* `match?` returns the match size, not a position
* `skip` was missing the `->` arrow
... zonuexe (Kenta USAMI)

05/20/2026

05:34 AM Ruby Bug #22075 (Closed): heap-use-after-free in `rb_vm_ci_lookup` under parallel Ractors

## Environment
- `ruby 4.0.5 (2026-05-20 revision 64336ffd0e) +PRISM [aarch64-linux]`
- Also reproduced on `ruby 4.0.4 ... [x86_64-linux]`.
## Summary
Under a parallel Ractor pool, a GC sweep on one Ractor frees a `T_DATA` obje... zonuexe (Kenta USAMI)

04/25/2024

01:23 PM Ruby Bug #20454 (Third Party's Issue): IRB echoes excessive input in dumb terminal

When IRB is started on a terminal with the environment variable TERM=dumb, excessive output is generated as shown below.
A simple terminal such as Emacs shell-mode or comint-mode is assumed, but it should be possible to reproduce the ... zonuexe (Kenta USAMI)

09/09/2014

05:27 PM Ruby Bug #10218: 手続きを再帰するとSegmentation faultが発生する

https://bugs.ruby-lang.org/issues/9945 と同じ原因で、既に修正済みのような気がする zonuexe (Kenta USAMI)

05:14 PM Ruby Bug #10218 (Closed): 手続きを再帰するとSegmentation faultが発生する

`stack level too deep (SystemStackError)`が発生することを期待した。
~~~
% ruby -v
ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-darwin13.0]
% ruby -e"r = ->(n){ print %(#{n},); r.(n+1) }; r.(0)" > /tmp/foo_out 2>/tmp/foo_err
zsh: abort ... zonuexe (Kenta USAMI)