Misc #22221: DevMeeting-2026-08-06

• Status: Open
• Assignee: -

[mame (Yusuke Endoh)]

The next dev meeting

Date: 2026/08/06 13:00-17:00 (JST)
Log: TBD

• 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 2026/08/03. 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

[shugo (Shugo Maeda)]

• [Feature #22213] Allow no-argument and chained calls of Proc#refined (shugo)
  • A no-argument call returns the receiver itself, and a chained call returns a Proc with additional refinements: prc.refined(*ms).refined(*ns) is equivalent to prc.refined(*ms, *ns)
  • The copy of the block is deferred until the first call, so a Proc that is never called is never copied, and a chained call is memoized like a single call with all the modules
  • I'd like matz to approve this behavior
• [Feature #22205] Deprecate ruby2_keywords (shugo)
  • I'd like to deprecate and eventually remove ruby2_keywords; feedback on the ticket is positive, and the proposed schedule is in the description
  • Should Hash.ruby2_keywords_hash? and Hash.ruby2_keywords_hash be deprecated one phase later than the marking methods (they are needed as long as flagged hashes exist), or on the same schedule?
• [Feature #9779] Add Module#descendants (shugo)
  • Module#descendants returns the classes and modules that inherit or include the receiver
  • Is it OK to add it to Module, not only Class?
  • Is it OK that the return value does not include self?
• [Feature #22132] Scala-like for comprehensions (shugo)
  • At the previous dev meeting, matz said he was interested and wanted to take time to consider it
  • Does matz have any opinions or questions at this point?

[Eregon (Benoit Daloze)]

• [Feature #22212] Add Thread::Backtrace::Location#source_range (eregon)
  • Proposes a portable API returning a Ruby::SourceRange for an exception's backtrace_locations or for caller_locations.
  • This gives tools stable start/end line/column coordinates without version-specific node_id values (examples of node_id instability).
  • Examples which could use this API instead of currently the CRuby-specific RubyVM::AST.node_id_for_backtrace_location, and therefore work reliably on TruffleRuby/JRuby:
    Prism.find(Thread::Backtrace::Location), Rails exception printing, error_highlight, power_assert.
  • It does not require the Prism gem or create Prism::Node objects, separating source-code location from parsing that code into an AST.
  • The implementation reparses on demand to avoid persistent memory overhead, uses source-hash validation based on @mame (Yusuke Endoh) 's work, and supports RubyVM.keep_script_lines = true to avoid re-reading files from disk.
  • Extensive specs ensure Prism and parse.y return identical user-facing coordinates, including for blocks.
  • I am looking for matz's approval for the new method.

[Eregon (Benoit Daloze)]

• [Bug #22197] Backtraces show methods which do not exist (eregon)
  • As the title says, backtraces sometimes list methods which do not exist, because of mixing definition name with run-time owner (Method#owner).
  • Since we print file, line and method name from the original definition (def), I think we should show the original module too.
  • Let's fix it? PR: https://github.com/ruby/ruby/pull/17963

[jaruga (Jun Aruga)]

• [Feature #22068] Adding post-quantum cryptography (PQC) support across Ruby standard libraries (jaruga)
  • I explain the feature with my motivations, and answer questions from other developers.
  • I want to share how to proceed for possible target libraries to modify: ruby/rubygems, bundler, ruby/net-http, ruby/open-uri, ruby/spec, ruby/drb, ruby/rbs.