Ruby Issue Tracking System

03/05/2026

01:36 PM Ruby Feature #21665: Revisit Object#deep_freeze to support non-Ractor use cases

It was discussed in the November 2025 meeting and it seems the conclusion was that @headius would be bringing a proposal to address @matz's concerns: https://github.com/ruby/dev-meeting-log/blob/master/2025/DevMeeting-2025-11-13.md#featu... ufuk (Ufuk Kayserilioglu)

03/04/2026

11:16 PM Ruby Bug #21941: Local variable becomes nil when YJIT enabled mid-method with fork/signal/ensure

I have a fix for this here: https://github.com/ruby/ruby/pull/16306 ufuk (Ufuk Kayserilioglu)

03/03/2026

09:08 PM Ruby Feature #21930: Add Ractor#empty? method to check for pending messages without blocking

@synacker Which version of Ruby are you testing with? Can you please send your `ruby -v` output for the benchmark results? ufuk (Ufuk Kayserilioglu)

02/15/2026

03:01 PM Ruby Feature #19979: Allow methods to declare that they don't accept a block via `&nil`

@kddnewton There is already a PR with both parse.y (from @nobu) and Prism changes: https://github.com/ruby/ruby/pull/11065
I'd be happy to rebase, update that branch and merge any other changes you think are important for Prism. ufuk (Ufuk Kayserilioglu)

01/14/2026

04:42 PM Ruby Feature #13683: Add strict Enumerable#single

@Dan0042 If the proposed method isn't going to raise an exception, then how would one disambiguate between a `nil` result because the collection has a single entry which is `nil` and a `nil` result since the collection has (for example) ... ufuk (Ufuk Kayserilioglu)

12/23/2025

12:52 PM Ruby Bug #21802: segmentation fault when installing gems on CI

Please post the C level backtrace as well. Usually that's very helpful. ufuk (Ufuk Kayserilioglu)

11/18/2025

12:06 PM Ruby Bug #21696: Performance degradation for long running processes in Ruby 4.0.0-preview2

Did 3.5-preview1 have the same behaviour? If not, could you bisect between the two releases to find the commit that changed the behaviour? ufuk (Ufuk Kayserilioglu)

11/09/2025

12:04 PM Ruby Bug #21677: Integer("08") raises an ArgumentError

From the docs https://docs.ruby-lang.org/en/3.4/Kernel.html#method-i-Integer:
> With base zero, string object may contain leading characters to specify the actual base (radix indicator):
> ...
So, your strings are interpreted as octa... ufuk (Ufuk Kayserilioglu)

11/05/2025

06:17 PM Ruby Misc #21657: Question: Is Ruby 4.0 planned for December 2025 or later?

retro (Josef Šimánek) wrote in #note-17:
> @mame so why to release 4.0 if not causing major breaking changes?
Quoting [my answer to this](https://bugs.ruby-lang.org/issues/21657#note-3) from above:
> ... that is completely a decisio... ufuk (Ufuk Kayserilioglu)

11/02/2025

04:25 PM Ruby Bug #21659: rstring.h error: missing initializer for field ‘len’ of ‘struct RString’ [-Werror=missing-field-initializers] starting in ruby-3.3.10

Isn't this related to this problem with GCC? https://bugs.ruby-lang.org/issues/21655#change-114967 ufuk (Ufuk Kayserilioglu)