Ruby Issue Tracking System

Today

07:46 PM Ruby Bug #22464 (Closed): Backport #16801 (overflowed repeat/null-check IDs in Onigmo) to 4.0 and 3.4; missing from 4.0.8 despite its release notes

3.4 was backported a few hours ago.
I just opened a backport PR for 4.0 at https://github.com/ruby/ruby/pull/19486
(closing because that's the process for backports) byroot (Jean Boussier)

10/19/2026

11:47 AM Ruby Bug #22453: GET_EC() may break when the native thread switches under M:N threads

> I think option 1 (Avoid GET_EC() as much as possible and pass ec explicitly.) is not realistic because it requires rewriting a large amount of existing code.
I agree that it's not a suitable solution short term, especially since in ... byroot (Jean Boussier)

10/17/2026

12:21 PM Ruby Bug #22452: `rb_equal` returns true for `NaN == NaN`

Possibly a duplicate of [Bug #1720] where it was established that `Float::NaN == Float::NaN` is "undefined" therefore OK.
It seems that the motivation was to not prevent optimization of `rb_equal`. byroot (Jean Boussier)

12:00 PM Ruby Bug #22452 (Open): `rb_equal` returns true for `NaN == NaN`

I noticed this while trying to cleanup and simplify `rb_equal`.
```ruby
>> Float::NAN == Float::NAN
=> false
> ...
=> 0
```
I would expect it to return `nil`.
`Array#index` is just an example, any core method, and even C ext... byroot (Jean Boussier)

08:37 AM Ruby Bug #22451: Coderange may be set incorrectly when concatenating a string into itself

Seems to have been present all the way since 1.9. byroot (Jean Boussier)

10/16/2026

05:05 PM Ruby Feature #22446: Speed up several core methods in Array, Range, String, Integer, Float and Time

> you like me to do that for PR #19360?
We don't backport performance patches, only bugfixes.
> ...
I already saw it, but's that's not how Ruby works, that's not for me to decide such a big change with user visible (albeit minor) i... byroot (Jean Boussier)

08:06 AM Ruby Feature #22446: Speed up several core methods in Array, Range, String, Integer, Float and Time

> Let's ship a better algorithm in 4.1, and an even better one in 4.2, and an even better one if 4.3…
It's not that simple though, there's a maintenance cost to all this (e.g. backports), and these algorithm can have subtly different ... byroot (Jean Boussier)

10/15/2026

08:47 PM Ruby Misc #22417: DevMeeting-2026-11-12

* [Feature 21308] Replacing dtoa.c implementation with a modern algorithm (byroot)
* Not my ticket, but this has been open for a while.
* While it's not a major hotspot for most applications, it's true that `Float#to_s` and `String... byroot (Jean Boussier)

08:34 PM Ruby Feature #22446: Speed up several core methods in Array, Range, String, Integer, Float and Time

> Conversions between Float and String:
For this specifically [Feature #21308] has been open for a while. I'd like to see it addressed, but this is a field that's been strangely moving fast with new implementation coming out regularly... byroot (Jean Boussier)

04:53 PM Ruby Feature #22437: Speed up creation and basic operations of Struct / Data

It would be easier to discuss the implementation if you opened a pull request (even as draft).
For instance I have several concerns about `hidden_ivar_get`:
- Not using atomics (technically tearing isn't a concern for pointer siz... byroot (Jean Boussier)