Activity
From 01/01/2026 to 01/07/2026
Today
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12:58 AM Revision 1abb609d (git): [ruby/mmtk] Check that a and b are valid objects in write barrier
- https://github.com/ruby/mmtk/commit/350625ebb3
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- https://github.com/ruby/mmtk/commit/12a3904b04
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12:51 AM Misc #21777: DevMeeting-2026-01-14
- * [Feature #18135] Add strict Enumerable#single (mame)
* ActiveSupport now has `Enumerable#sole`. https://github.com/rails/rails/pull/40914
* I want this on the core too. It's good that the intention of having only one is explicitl... -
- * [Feature #6012] Proc#source_location also return the column (mame)
* Quite a few gems are using the idiom `source_location.last`.
* The idiom will return a column number (of the end of the code range) instead of a line number.
... -
- I've only just learned that ActiveSupport introduced `Enumerable#sole` back in 2020.
https://github.com/rails/rails/pull/40914
I wish this were available in the core too. -
12:26 AM Revision a024dca3 (git): Remove `in_masgn` field from `struct iseq_compile_data`
- `in_masgn` has not been used since fb6e3a80009a744a4e0b75660f1ce6da65e20e6c.
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- Eregon (Benoit Daloze) wrote in #note-41:
> @mame Matz explicitly approved it: https://github.com/ruby/ruby/pull/15580#issuecomment-3691058342
Ah, I missed that the PR had already been approved. Sorry about that.
However, we should con...
01/06/2026
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11:25 PM Feature #21826: Deprecating RubyVM::AbstractSyntaxTree
- I am in favor, but that's no surprise.
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09:43 PM Feature #21826 (Open): Deprecating RubyVM::AbstractSyntaxTree
- I think it is time to deprecate `RubyVM::AbstractSyntaxTree`.
[Matz has agreed that going forward the official parser API for Ruby will be the Prism API](https://railsatscale.com/2024-04-16-prism-in-2024/) so it's clear the official Rub... -
11:05 PM Revision b2ed4cdc (git): [ruby/time] Add changelog URI to time.gemspec
- https://github.com/ruby/time/commit/08f896ca0d
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- The iseq object might be optimized away by the compiler in iseq_data_to_ary
because we mainly only use the iseq_body. With MMTk, this crash occasionally
happens:
TestIseqLoad#test_stressful_roundtrip [test/-ext-/iseq_load/test_iseq_... -
10:13 PM Revision 58fb95af (git): [DOC] Harmonize #== methods (#15805)
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- I think it is time to consider deprecating `Ripper`.
[Matz has agreed that going forward the official parser API for Ruby will be the Prism API](https://railsatscale.com/2024-04-16-prism-in-2024/) so it's clear the official Ruby parsing... -
- I'm opening this issue to discuss and ask the status of the universal parser implementing the Prism API.
[Matz has agreed that going forward the official parser API for Ruby will be the Prism API](https://railsatscale.com/2024-04-16-p... -
- I think this would be great to have, and abstract over implementation details like `node_id`.
It's also very powerful as e.g. `Thread::Backtrace::Location#ast` would be able to return a `Prism::CallNode` with all the relevant information... -
08:37 PM Bug #21320: Namespaces leak with constant lookup
- Awesome, thank you @tagomoris!
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- Great, thank you!
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08:12 PM Bug #21719: Thread deadlock with explicit require of a base clase in Linux Ruby 3.4
- Here's my understanding of the issue after debugging it for a bit. This is based on `mame`'s code:
A: main thread
B: other thread
1. `A` calls `require` on `"./target"`, which locks the thread shield (TS) for the `"./target"` feature, ... -
- Re `Binding#source_location` I don't think it's very useful to have given `Kernel#binding` seems to just return the location at which it was called, but not of the surrounding method/block:
```
$ ruby -e 'def foo
p binding.source_locat... -
- @mame Matz explicitly approved it: https://github.com/ruby/ruby/pull/15580#issuecomment-3691058342
And he also made it clear it was just too late in the release cycle to address #21783 and #21784, see https://bugs.ruby-lang.org/issues/60... -
- @eregon Why was this re-merged?
The first two issues raised in #note-32 (re-listed below) have not yet been resolved.
mame (Yusuke Endoh) wrote in #note-32:
> * Unclear use cases
> ...
In addition, as pointed out by @vo.x:
htt... -
- Hi there!
@byroot knows this, but for anyone reading, Zeitwerk essentially scans the file system and sets autoloads for the expected constants.
This feature is going to be great. As in the general case described in the issue descriptio... -
06:36 PM Bug #21803: `Addrinfo#connect_internal` should raise `IO::TimeoutError` on user-specified timeouts
- For what it's worth, changing the exception class is a breaking change (unless IO::TimeoutError is made to inherit from `Errno::ETIMEDOUT`, but it already inherits from `IOError`).
For instance https://github.com/redis-rb/redis-client... -
05:09 PM Revision 49ca241d (git): Show a more verbose message if BASERUBY is too old
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- headius (Charles Nutter) wrote in #note-37:
> I am also +1 for this change.
> ...
Thank you for the support.
> However I understand the concerns about making a mutable type suddenly immutable when it has provably been used for a few... -
09:37 AM Revision 925d0410 (git): Add `rake` target to run the bundled `rake`
- 09:30 AM Revision bff7c6d9 (git): [DOC] Fix minor typo on shareable procs section
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- Updated [the PR](https://github.com/ruby/ruby/pull/15217) to reject `a[cmd 1, 2 do end]`, `a[cmd 1, 2 do end] = 3` and so on, based on https://bugs.ruby-lang.org/issues/21168#note-10.
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04:38 AM Revision ad6b8545 (git): [ruby/rubygems] Retain current bundler version on `bundle clean`
- Previously: In #9218 a reproduction is shared where running `bundle clean` using a binstub (`bin/bundle`) results in bundler removing itself. This results in Ruby falling back to its default bundler version. This behavior seems to be pre...
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- https://github.com/ruby/rubygems/commit/675342e6d0
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- https://github.com/ruby/rubygems/commit/5a6eca4cf9
- 04:38 AM Revision 3143543f (git): [ruby/rubygems] Compare like values in find_bundler
- The input to this method is not guaranteed to be a string, it could be a `Gem::Version` this normalizes the comparison.
https://github.com/ruby/rubygems/commit/1f43c7a988 -
04:07 AM Revision 1b476606 (git): Update the latest versions of actions
- 02:42 AM Revision 95f2c78f (git): Bump dependabot/fetch-metadata from 2.4.0 to 2.5.0
- Bumps [dependabot/fetch-metadata](https://github.com/dependabot/fetch-metadata) from 2.4.0 to 2.5.0.
- [Release notes](https://github.com/dependabot/fetch-metadata/releases)
- [Commits](https://github.com/dependabot/fetch-metadata/compar...
01/05/2026
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- https://github.com/ruby/mmtk/commit/8813e76bf8
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10:08 PM Revision c04363c0 (git): Remove k0kubun from CODEOWNERS
- nagachika will take over the maintenance of ruby_3_4 going forward.
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- to remind us of skipped benchmarks in the CI job names
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- to remind us of skipped benchmarks in the CI job names
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- I am also +1 for this change.
In general I'd like to see a steady progression toward more frozen-by-default core types, especially when the need for mutability is as questionable as the examples given here.
However I understand the... - 09:00 PM Revision 9b2ff68f (git): Box: skip checking the current box is the root box
- Because checking the current box is not a cheap process.
- 09:00 PM Revision b3371c6a (git): Box: allocate classes as boxable when it happens in the root box
- Without this change, classes (including iclass) are allocated
as un-boxable classes after initializing user boxes (after starting
script evaluation). Under this situation, iclasses are created as
un-boxabled class when core modules are i... -
08:58 PM Bug #21824: performance regression in regexp matching after update to 4.0
- To clarify: when testing on a Ruby version built from the commit before 981ee02c7c664f19b983662d618d5e6bd87d1739 (i.e. a6379032ee98bc43fb68ce7a6c186f3512558ce0), the test runs as fast as on 3.4. When testing on 981ee02c7c664f19b983662d61...
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- TLDR: a change in the regexp algorithm in regcomp.c merged around October was supposed to speed up the matching, but it seems it has slowed it down more in practice.
===
I'm running a service written in Ruby which serves some numbe... -
08:16 PM Revision 23765a5e (git): ZJIT: Update Iongraph (#15806)
- Fix some rendering bugs and remove React.
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05:19 PM
Bug #21812 (Closed): Kernel#sleep without arguments returns immediately when subprocess exits in another thread (regression in Ruby 4.0)
- Applied in changeset commit:git|7e81bf5c0c8f43602e6d901f4253dca2f3d71745.
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Fix sleep spurious wakeup from sigchld (#15802)
When sleeping with `sleep`, currently the main thread can get woken up from sigchld
from any thread (s... -
- @mame Yes no problem, I have a fix coming. Thanks for the bisect btw, it saved me quite a bit of time 😊
- 05:18 PM Revision 7e81bf5c (git): Fix sleep spurious wakeup from sigchld (#15802)
- When sleeping with `sleep`, currently the main thread can get woken up from sigchld
from any thread (subprocess exited). The timer thread wakes up the main thread when this
happens, as it checks for signals. The main thread then executes... - 08:11 AM Revision c65a5548 (git): Update box.md
- "Code" (when used to refer to what we create in Ruby or any other programming language) is an abstract non-count noun, so it cannot be pluralized. ("Codes" would be used when referring to specific countable things like PIN codes, which ...
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- This `rb_cObject` declaration was only for `rb_cData()` that was
removed at 7c738ce5e649b82bdc1305d5c347e81886ee759a. -
- https://github.com/ruby/rubygems/commit/7b9bfb4e18
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- https://github.com/ruby/rubygems/commit/12072e8d23
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- https://github.com/ruby/rubygems/commit/4c1eb2b274
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- https://github.com/ruby/rubygems/commit/aa7632161e
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04:48 AM Revision 99bd18b5 (git): Unskip RBS test on Windows for NoMemoryError workaround
- test-unit 3.7.7 has been fixed this problem.
See also:
https://github.com/test-unit/test-unit/releases/tag/3.7.7 -
02:49 AM Revision e6762d23 (git): [DOC] Fix a typo and trim trailing whitespace per .editorconfig
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- https://github.com/nobu/ruby/tree/retval-in-ensure
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12:58 AM Revision 699813b6 (git): [ruby/rubygems] Remove date require from rebuild command
- As far as I can see, this isn't used.
https://github.com/ruby/rubygems/commit/67c97e7180
01/04/2026
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- * Notably it does not on BSD, macOS and Windows.
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03:05 PM Bug #21823 (Open): $! is nil inside rescue block when $! is accessed before raise in Ruby::Box
- ## Description
When Ruby::Box is enabled (`RUBY_BOX=1`), accessing `$!` before a `raise` statement causes `$!` to be `nil` inside the subsequent `rescue` block, instead of containing the raised exception.
## Reproduction
`... -
- * https://github.com/ruby/ruby/actions/runs/20694508956/job/59407571754
1)
UNIXSocket.pair emulates unnamed sockets with a temporary file with a path FAILED
Expected "C:\\a\\_temp\\102424668889-2384.($)".match? /\\AppData\\Local\\T... -
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- This commit adds a field handle_weak_references to rb_data_type_struct for
the callback when handling weak references. This avoids TypedData objects
from needing to expose their rb_data_type_struct and weak references function. -
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- @nobu Please check my previous comment
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- It is used to expand repository references to URL.
- 06:56 AM Revision 912cf819 (git): [ruby/openssl] Improve Argument Error Message in EC:Group.new
- Before, passing the wrong number of arguments (e.g., 2) to
OpenSSL::PKey::EC::Group.new raised a generic "wrong number of
arguments"
error.
This change updates it to show the actual argument count and the
expected
options (1 or 4), maki... -
03:53 AM Revision ca0fece5 (git): [DOC] Tweak an example in language/box.md
- Although the example code comments indicate that it returns `false`,
a non-matching result for `=~` is actually `nil`.
```ruby
Foo.foo.blank? #=> false
"foo".blank? #=> false
```
https://github.com/ruby/ruby/blob/v4.0.0-preview3/doc/... -
- Based on the example, it appears that `foo.rb` and `main.rb` are expected to be in the same directory.
Since Ruby 1.9, the current directory is not included in `$LOAD_PATH` by default.
As a result, running `box.require('foo')` as shown i... -
- Redos commit 544770d which seems to have accidentally been undone in b27d935.
01/03/2026
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07:58 PM Misc #21777: DevMeeting-2026-01-14
- * [Feature #21264] Extract Date library from Ruby repo in the future (jeremyevans0)
* Do we want to extract `date` to bundled gems?
* I'm fine keeping it as stdlib, and if it needs a maintainer, I volunteer to maintain it.
* If ... -
- * [Feature #21800] `Dir.foreach` and `Dir.each_child` to optionally yield `File::Stat` object alongside the children name (byroot)
* It's common for development tools to need to recursively scan the file system, but it's slower than i... -
- I've been thinking more about this. If we want to move `date` from stdlib to bundled gems, I still think it would be best to have a subset of the current `Date` as be a core class. `Date` is very widely used, but the vast majority of usa...
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- I have another PR that allow Backtrace objects to be duped, hence to send them across Ractors: https://github.com/ruby/ruby/pull/15795
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- > I'm not sure if there is a way to allow an object to be copied without defining an allocator function.
So I experimented with this a bit. It wouldn't be hard at all to disable `Class#allocate` while still allowing `rb_obj_dup` etc t... -
- > https://github.com/ruby/ruby/pull/15790 fixes the make_shareable.
Actually, might be more tricky than that. `Backtrace` object have two lazily instantiated mutable arrays (`backtrace` and `backtrace_locations`). So if we mark them ... -
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10:11 AM Feature #21822 (Open): Expose Return Value in the ensure Block
I'd like to propose a simple feature that allows easy access to the return value inside an ensure block.
```ruby
begin
# ...
ensure => ret
# ret is nil if an exception is raised
LOGGER.debug "return value: #{ret}"
en...-
- > I think it will depend on what you achieve with Stack.
Yes, the point is to use it in cases where synchronization is needed, hence Array is not suitable. Typically connection pools: https://github.com/mperham/connection_pool/blob/8b... -
- byroot (Jean Boussier) wrote:
> Currently `Queue` and `SizedQueue` are technically defined under `Thread` and aliased in `Object`.
> ...
I think it will depend on what you achieve with `Stack`.
If you want to use it for inter thread... -
- ### Context
`Queue` and `SizedQueue` are very useful and performant constructs, however they only allow for FIFO queues.
Some use cases do call for LIFO queues AKA stacks.
For instance, in the case of connection pool, it's often p... -
09:12 AM Revision 65f9c4a0 (git): Drop memberless Data/Struct#inspect trailing space
- Anonymous memberless Structs and Data were returning `#<struct >` and
`#<data >` with a trailing space. Now they return `#<struct>` and
`#<data>` to match attrless class behavior and look a bit more compact. -
- > the point is MonitorMixin seems well done and core-worthy.
Yeah, I don't think I agree with this. I never use it because including it expose a bunch of `mon_*` public methods that nobody ever use.
At the end of the day 99% of Monit... - 08:30 AM Revision b6463d59 (git): [ruby/json] Directly write to the output buffer when converting UTF32 to UTF8.
- https://github.com/ruby/json/commit/a51317c949
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- Applied in changeset commit:git|d7a6ff8224519005d2deeb3f4e98689a8a0835ad.
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[Bug #21819] Data objects without members should also be frozen -
- [GH-15792](https://github.com/ruby/ruby/pull/15792)
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02:19 AM Bug #21819 (Closed): A Data object should be frozen even if it has no members
- Data objects with at least one member are currently automatically frozen on construction, and shareable if all members are shareable. However, a Data object with no members is not frozen on construction. I would expect such an object sim...
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- Delete test/net/imap/test_data_lite.rb, because the target of this
test file has been deleted by [ruby/net-imap#543].
[ruby/net-imap#543]: https://github.com/ruby/net-imap/pull/593 -
03:20 AM Bug #21820 (Open): "vm_call_cfunc: cfp consistency error" occurs during rdoc generation when installing Ruby 4.0.0 via rbenv on Ubuntu 24.04
- This is transferred from https://github.com/rbenv/ruby-build/discussions/2594#discussioncomment-15394211
# My environment
``` shell
[sue445@sue445-win] [12-31 23:34:49] $ lsb_release -a
No LSB modules are available.
Distributor ID... -
- https://github.com/ruby/mmtk/commit/308936296a
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- This allows the mutator thread to dump its backtrace when a GC thread crashes.
https://github.com/ruby/mmtk/commit/40ff9ffee7
01/02/2026
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- A large part of `thread_sync.c` was migrated already, might as well
go all the way. It also allow to remove a bunch of Rdoc commands. -
- https://github.com/ruby/ruby/pull/15790 fixes the `make_shareable`. As for sending, I'm not sure if there is a way to allow an object to be copied without defining an allocator function.
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- > Is this intentional?
I don't think so, more of an oversight. Looking at the implementation, I don't see a reason why it couldn't be marked as FROZEN_SHAREABLE. -
- It looks like Thread::Backtrace is confined to the Ractor that produced it: it cannot be copied or moved to another Ractor, nor can it be made shareable. This makes it difficult for a Ractor to communicate exceptions (e.g. the reason for...
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- https://github.com/ruby/mmtk/commit/c3e338bb25
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- https://github.com/ruby/mmtk/commit/58210c88ed
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- Using `eval` it's possible to reference a later argument, and
this requires careful initialization of the stack. -
- They are optional because they have a default value, so I don't
understand why we'd need to initialize them to nil. -
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- Rather than to push items one by one we can directly memcpy.
- 08:43 AM Revision 11165495 (git): [ruby/rubygems] Bump the rb-sys group across 2 directories with 1 update
- Bumps the rb-sys group with 1 update in the /test/rubygems/test_gem_ext_cargo_builder/custom_name/ext/custom_name_lib directory: [rb-sys](https://github.com/oxidize-rb/rb-sys).
Bumps the rb-sys group with 1 update in the /test/rubygems/t... - 06:55 AM Revision 0ec5678c (git): Update bundled gems list as of 2026-01-02
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- The version message may contain other info such as the distribution.
e.g.:
```console
$ /usr/bin/git --version
git version 2.50.1 (Apple Git-155)
``` -
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01/01/2026
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- https://github.com/ruby/mmtk/commit/42adba630e
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- https://github.com/ruby/prism/commit/91f60cb736
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- Thread::Queue spends a significant amount of time in array functions,
checking for invariants we know aren't a problem, and whether the backing
array need to reordered.
By using a ring buffer we can remove a lot of overhead (~23% faster... -
- str_duplicate_setup_heap is missing a call to rb_gc_register_pinning_obj
that STR_SET_SHARED correctly calls. -