Misc #22088: DevMeeting-2026-06-11

• Status: Closed
• Assignee: -

[mame (Yusuke Endoh)]

The next dev meeting

Date: 2026/06/11 13:00-17:00 (JST)
Log: https://github.com/ruby/dev-meeting-log/blob/master/2026/DevMeeting-2026-06-11.md

• Dev meeting IS NOT a decision-making place. All decisions should be done at the bug tracker.
• Dev meeting is a place we can ask Matz, nobu, nurse and other developers directly.
• Matz is a very busy person. Take this opportunity to ask him. If you can not attend, other attendees can ask instead of you (if attendees can understand your issue).
• We will write a record of the discussion in the file or to each ticket in English.
• All activities are best-effort (keep in mind that most of us are volunteer developers).
• The date, time and place of the meeting are scheduled according to when/where we can reserve Matz's time.
• DO NOT discuss then on this ticket, please.

Call for agenda items

If you have a ticket that you want matz and committers to discuss, please post it into this ticket in the following format:

* [Ticket ref] Ticket title (your name)
  * Comment (A summary of the ticket, why you put this ticket here, what point should be discussed, etc.)

Example:

* [Feature #14609] `Kernel#p` without args shows the receiver (ko1)
  * I feel this feature is very useful and some people say :+1: so let discuss this feature.

• It is recommended to add a comment by 2026/06/08. We hold a preparatory meeting to create an agenda a few days before the dev-meeting.
• The format is strict. We'll use this script to automatically create an markdown-style agenda. We may ignore a comment that does not follow the format.
• Your comment is mandatory. We cannot read all discussion of the ticket in a limited time. We appreciate it if you could write a short summary and update from a previous discussion.

[mame (Yusuke Endoh)]

• Related to Misc #14770: [META] DevelopersMeeting added

[byroot (Jean Boussier)]

• [Feature #22085] String#to_f and Kernel#Float shouldn't issue Float out of range warnings (byroot)
  • This is a good warning when Ruby is parsing source code.
  • But it's not really actionable when parsing user input.

[hasumikin (hitoshi hasumi)]

• [Feature #22082] Introduce Bit Operations into String (hasumikin)
  • I'd like you to discuss whether it's appropriate to add such functionality to the String class
  • I've proposed many methods in this ticket, but I don't think we need approval for all of them at once. I'd like the core developers to consider which ones should be moved forward and which ones should be followed up

[shugo (Shugo Maeda)]

• [Bug #22058] {Method,InstanceMethod}#super_method doesn't work correctly for refined method with refinements for method active in the caller's scope
  • Is it ok to keep the 2.7+ behavior of super? https://bugs.ruby-lang.org/issues/22058#note-13

[Eregon (Benoit Daloze)]

• [Feature #21998] Add {Method,UnboundMethod,Proc}#source_range (eregon)
  • Are these tweaks OK? See https://bugs.ruby-lang.org/issues/21998#note-25
  • PR is ready: https://github.com/ruby/ruby/pull/16835

[himura467 (Akito Shitara)]

• [Feature #19315] Lazy substrings in CRuby
  • I created a prototype implementation: https://github.com/ruby/ruby/pull/17045
  • This is also a prerequisite for [Feature #22056].
  • Proposed approach:
    • Keep RSTRING_PTR() behavior unchanged. This is essential for preserving compatibility with existing C extensions.
    • Introduce a new API (tentatively named RSTRING_RAW_PTR()) that returns a raw pointer without guaranteeing null termination and without triggering unsharing.
      • Zero-copy requires caller migration, but I consider compatibility the higher priority.
  • Would like you to discuss:
    • Whether the no-GVL handling in RSTRING_PTR() is warranted (see https://bugs.ruby-lang.org/issues/19315#note-18)
    • How RSTRING_PTR() should handle null termination: permanently unshare, or allocate a read-only copy instead (see https://bugs.ruby-lang.org/issues/19315#note-23), with a possible restriction to frozen/STR_TMPLOCK strings only (see https://bugs.ruby-lang.org/issues/19315#note-27)
    • Whether RSTRING_RAW_PTR() is an appropriate name for the new API

[nobu (Nobuyoshi Nakada)]

• [Feature #22093] Introduce Process::ID for process IDs returned by Process.spawn and fork

  • Add integer-like class Process::ID which wraps a process ID.

  • Open questions

    • Should Process::ID include Comparable, or only define <=>?
    • Should Process::ID#wait accept the same integer flags as existing wait APIs, provide keyword arguments, or support both?
    • Should Process::ID#detach simply be equivalent to Process.detach(self)?
    • Are there other process-related APIs that should return or preserve Process::ID?

  • https://github.com/ruby/ruby/pull/17213

[jhawthorn (John Hawthorn)]

• [Feature #22067] New RUBY_TYPED_THREAD_SAFE_FREE bit to declare thread safe dfree functions (jhawthorn, luke-gru)
  • Proposes an opt-in TypedData flag declaring a dfree() function thread-safe
  • Allows GC implementations to free TypedData in parallel / concurrently with Ruby code or with Ractor-local GC
  • Implies RUBY_TYPED_FREE_IMMEDIATELY (more strict for extension authors, more flexible for GC)
  • Alternate name: RUBY_TYPED_FREE_THREAD_SAFE. Shares prefix with RUBY_TYPED_FREE_IMMEDIATELY, but reads more awkwardly.
  • OK to add flag?

[koic (Koichi ITO)]

• [Feature #18915] New error class: NotImplementedYetError or scope change for NotImplementedError
  • NotImplementedError has frequently been used for a purpose different from its intended role, namely to indicate that a method is expected to be implemented by a subclass. A new exception class with a name such as SubclassResponsibility (or AbstractMethodError) has been proposed for this use case.
  • Since both the naming and inheritance hierarchy were still under discussion, I raised this topic at Matsue RubyKaigi 12 on June 6, 2026.
  • SubclassResponsibility was considered a candidate for the class name.
  • At Matsue RubyKaigi 12, I confirmed support for having the new exception class inherit from ScriptError (not RuntimeError).
  • I have posted a summary of these discussions in an issue comment. Are there any remaining concerns that could block resolution?

[soutaro (Soutaro Matsumoto)]

• [Feature #22081] Core type definition migration from ruby/rbs to ruby/ruby
  • Move RBS type definitions of core library from ruby/rbs to ruby/ruby
  • Better developer experience for updating RBS files for core library including running tests

[yaroslavmarkin (Yaroslav Markin)]

• [Ticket #22094] Speed up Array#join with a byte-copy fast path
  • Speed up ASCII or UTF-8 Array#join's of strings with fast copying

[mame (Yusuke Endoh)]

• Description updated (diff)
• Status changed from Open to Closed