Activity
From 02/18/2026 to 02/24/2026
Today
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03:06 AM Revision 997ac19b (git): ZJIT: Remove redundant PatchPoints within basic blocks (#16231)
- Add a new optimization pass that deduplicates PatchPoint instructions
asserting the same invariant within a basic block when no intervening
instruction could invalidate it.
This is common in practice — e.g., `1 + 2 + 3` produces two ide... -
03:05 AM Feature #21835 (Closed): Unbundle bunled gems like net-ftp
- Removed them at https://github.com/ruby/ruby/pull/16169
-
03:01 AM Bug #20319 (Closed): Singleton class is being frozen lazily in some cases
- Applied in changeset commit:git|8e9eb698b6638e0f3e76748c756f699e79d2e97d.
----------
Freeze singleton class chain
The following code:
```ruby
x = Object.new
sc1 = x.singleton_class
sc2 = sc1.singleton_class
x.freeze
```
Would freeze ... -
02:52 AM Bug #20319: Singleton class is being frozen lazily in some cases
- I accept https://github.com/ruby/ruby/pull/10245
Matz.
-
- The following code:
```ruby
x = Object.new
sc1 = x.singleton_class
sc2 = sc1.singleton_class
x.freeze
```
Would freeze sc1 but not sc2, even though sc1 would be frozen.
Handle this by walking the class pointer chain for the object.
If... -
- First of all, the title is wrong. Ruby committers can still commit to the default gem repository.
>(FWIW I saw there a default-gems-contributor team with 3 people, which explains why they can merge PRs to some repositories that ruby c... -
-
12:10 AM Misc #21881: Split the root box into the (newer) root box and the master of copied user boxes
- After a short coding, I changed my idea about the naming. The original copy of boxes will be `master` (master-copy).
I thought the `source` box should be confusing because the word "source" is used everywhere both in CRuby and Ruby code. -
-
- The root box is mandatory because it runs the code of Ruby runtime itself. For example, Array#fetch_values written in Ruby (array.rb).
02/23/2026
- 11:58 PM Revision f3ee4bd0 (git): ZJIT: Remove redundant snapshot for opt_getconstant_path (#16229)
- 10:03 PM Revision 070b7d40 (git): ZJIT: constant fold bitwise AND (&) operations (#16226)
- Following up https://github.com/ruby/ruby/pull/16225, I'm implementing fold on AND (&) operations.
- Ruby turns this operation into a C `&` in https://github.com/tomascco/ruby/blob/880eb3c76f09c44c85389ac5efbc555afafa3e6f/numeric.c#L519... -
- inline_array_push, inline_array_pop, and inline_array_aref did not
guard/coerce the receiver to Array type before emitting Array-specific
HIR instructions (ArrayPush, ArrayPop, ArrayLength, ArrayAref).
This caused a MismatchedOperandTyp... -
05:20 PM Revision 20eeb720 (git): Commit a diff shown on check_misc
- https://github.com/ruby/ruby/actions/runs/22316806245/job/64563939588
Local `make update-man-date` generates nothing but CI complains about
it, so just pushing this diff to make it happy. - 05:14 PM Revision 6f0244e0 (git): ZJIT: Pull GetEP out of GetLocal (with level > 0) (#16215)
- Closes: https://github.com/Shopify/ruby/issues/944
As a first step toward enabling CSE/LVN-based deduplication of frame EP loads,
splitting `GetLocal` handling for `level > 0` into an explicit `GetEP + LoadField` path.
A follow-up PR w... - 05:12 PM Revision ffbe288f (git): ZJIT: constant fold bitwise XOR (^) operations (#16225)
-
05:06 PM Revision 107699df (git): [ruby/erb] Freeze src in initialize
- (https://github.com/ruby/erb/pull/105)
https://github.com/ruby/erb/commit/3d4dc31905 -
04:56 PM Bug #21921: Hash inconsistent ==, >=, <= behavior
- > > An entry `h0[k0]` in one hash is equal to an entry `h1[k1]` in another hash if and only if the two keys are equal (`k0 == k1`) and their two values are equal (`h0[k0] == h1[h1]`).
> ...
It doesn't just say "equal", it specifically m... -
12:43 PM Feature #21923 (Open): DTrace USDT probe Ruby method arguments and return value
- I'm interested in improving the DTrace USDT probes in Ruby. I would like to expose the Ruby method arguments and return value to the DTrace probes `(c)method-entry` and `(c)method-return`. This would be done by adding a fifth argument to...
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11:34 AM Feature #19107: Allow trailing comma in method signature
- > What about the lambda arguments?
@nobu it's unclear to me so I didn't change them. I added https://bugs.ruby-lang.org/issues/21875 to the next dev meeting. -
04:43 AM Feature #19107: Allow trailing comma in method signature
- What about the lambda arguments?
commit:731b6092e9268af960bf0f060e37504f4deb7380 seems not to allow `->(a,) {}`.
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09:35 AM Revision fd492edd (git): Fix spurious uses of BASE_SLOT_SIZE
- In gc_sweep_plane, VALGRIND_MAKE_MEM_UNDEFINED was using BASE_SLOT_SIZE
which only covers the smallest pool's slot size. For larger size pools
this left the tail of the slot with stale state. Use the page's actual
slot_size instead.
In ... -
- These tests failed with RHEL10 again.
02/22/2026
-
- Closes https://github.com/ruby/prism/issues/3837
While these lines are whitespace only from a runtime perspective,
the line continuation is significant for AST consumers.
Sort of a followup to https://github.com/ruby/prism/commit/faab2... -
- Applied in changeset commit:git|731b6092e9268af960bf0f060e37504f4deb7380.
----------
[ruby/prism] [Feature #19107] Allow trailing comma in method signature
https://github.com/ruby/prism/commit/b7e247ce6a -
- https://github.com/ruby/prism/commit/b7e247ce6a
-
04:32 PM Revision 6d69a2b8 (git): [ruby/prism] Rename Java package to org.ruby_lang.prism
- This moves all of the non-JRuby Java code from the org.prism
package to the org.ruby_lang.prism package (corresponding to the
ruby-lang.org domain and prism project).
https://github.com/ruby/prism/commit/80b7402f8b -
-
- 05:34 AM Revision 07645fe8 (git): [DOC] man: Increase section number portability
- Remove a zero-width space from manual page section numbers improving
portability with the mandoc compiler used on macOS, BSD, and illumos.
Previously it was polluting the whatis(1) database, showing as being
in both sections `1` and als... -
04:15 AM Bug #21919: `libruby-static.a` links to wrong `Init_enc`
- nobu (Nobuyoshi Nakada) wrote in #note-1:
> `--with-static-linked-ext` means the extension libraries including encodings are linked to the ruby executable or library.so.
Which `library.so` is that exactly?
nobu (Nobuyoshi Nakada... -
- `--with-static-linked-ext` means the extension libraries including encodings are linked to the ruby executable or library.so.
`-static.a` is not intended to link these extensions. -
03:44 AM Revision ac4aebc7 (git): Use ruby-head instead of ruby-3.2 in check_misc job (#16217)
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02:56 AM Revision fcba4c1a (git): [DOC] Improve link in yjit.md
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02/21/2026
-
08:25 PM Misc #21922 (Open): Permissions for committers for default/bundled/unbundled gems repositories
- I noticed recently that the team `ruby-committers` on GitHub no longer has write access to at least:
* https://github.com/ruby/benchmark
* https://github.com/ruby/cmath
* https://github.com/ruby/curses
* https://github.com/ruby/dbm
... -
-
06:13 PM Bug #21921: Hash inconsistent ==, >=, <= behavior
- By the way, I noticed the following behavior, which feels like it might not satisfy the specification:
```ruby
h1 = {}.compare_by_identity
h1["one"] = true
h1["one"] = true
h2 = { "one" => true }
h1 <= h2 # current: false, expe... -
- The documentation for Hash inclusion is a bit hard to understand due to its mathematical phrasing.
> The spec merely says that keys are compared with `==`, but I believe they are actually compared with `eql?` (for normal hashes).
T... -
03:02 PM Bug #21921: Hash inconsistent ==, >=, <= behavior
- This has not affected any real-world app I use. I noticed this while working on a bidirectional hash gem (bihash@rubygems).
However, I don't think the behavior is consistent with the spec as written:
The spec merely says that keys are c... -
- The current specification of `Hash#<=` is to check if all elements of the supposedly smaller Hash are included in the supposedly larger Hash. I think the reported behaviors are actually working as specified.
https://github.com/ruby/ru... -
- Hash seems to have very inconsistent behavior for `==`, `>=`, and `<=`.
Given that below h1 == h2 is `false` and that they have the same number of keys, I would expect `<=` and `>=` to also be `false`.
However, surprisingly `h1 <= h2` ... -
- I often use the offset parameter from `String#byteindex` and was a bit surprised there is not yet something for arrays. It's a bit unfortunate with the ambiguity between block/noblock usage but a keyword argument `offset` seems like a pe...
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- Anonymous modules/classes get names like `"#<Module:0x00007f...>"` from `rb_class2name`, which include a memory address that changes between runs. This makes stat keys unstable for diffing across runs and is less informative than it coul...
-
07:55 AM Bug #21920 (Closed): LIBRUBYARG_SHARED contains -lgmp and other libraries for static linking
- The commit was reverted https://github.com/ruby/ruby/pull/16212, it should be fixed now.
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- Use keyword arguments and extract repeated regexps as constant.
-
-
- This test has been failing intermittently on multiple CI platforms
(Debian 13, RHEL 9/10, Ubuntu aarch64) with heap_allocated_pages
growing from 100 to 130, or major_gc_count incrementing by 1.
Failing run: https://rubyci.s3.amazonaws.c... -
- This reverts commit d256629bf9e194838d1837be74dcc0b8ff0bcfd6.
02/20/2026
-
- This is being used to calculate the starting point of the slots in a
page in order to make them evenly divisible by a bitmap plane.
Since https://github.com/ruby/ruby/pull/16150 we restructured the
bitmaps in order to pack them such tha... -
10:33 PM Bug #21855: Bundle `win32-registry` or implement it without `fiddle`
- Thanks for merging!
There is a second bug, that is fixed by making win32-registry a bundled gem: The gemspec of the default gem looks like so:
```ruby
$ cat c:\Ruby40-arm\lib\ruby\gems\4.0.0\specifications\default\win32-registry-0.1... -
- Applied in changeset commit:git|f01f66ca249405ec125ba864e48e51944cc51c6f.
----------
Move win32-registry from default to bundled gems
Because win32-registry needs fiddle and fiddle is a bundled gem.
[Bug #21855] -
- @usa has no objection for that. I will merge https://bugs.ruby-lang.org/issues/21855#note-6 and handle related works.
-
- That recent commit introduced `MAINLIBS` into `LIBRUBYARG_SHARED`: https://github.com/ruby/ruby/commit/d256629bf9e194838d1837be74dcc0b8ff0bcfd6
Before that commit:
```
CONFIG["LIBRUBYARG_SHARED"] = "-l$(RUBY_SO_NAME)"
CONFIG["L... -
- When building Ruby with `--with-static-linked-ext`, `libruby-static.a` links the `Init_enc` function from `dmyenc.c` instead of `enc/encinit.c.erb`, resulting in `uninitialized constant Encoding::UTF_8` error, among other things.
Ther... -
- Multiple YJIT functions created overlapping `&'static mut IseqPayload`
references by calling `get_iseq_payload()` multiple times for the same
iseq. Overlapping &mut is UB in rust's aliasing model, and as consequence,
we trigered use-afte... -
04:04 PM Revision 906176ad (git): ZJIT: zjit-bisect.rb: Pass options with -T for `make test-spec`
- It was passing options to the test harness rather than ruby(1).
-
11:18 AM Revision ee2d9029 (git): [ruby/json] Use single quotes for allow_invalid_escape doc
- Instead of using %{} which works like double-quoted string and allows
escape sequences and in which "other escaped characters (a backslash
followed by a character) are interpreted as the character", change the
examples for `allow_invalid... -
11:12 AM Revision f3d52cb8 (git): [ruby/rubygems] Document concurrent_downloads in environment command
- https://github.com/ruby/rubygems/commit/927f1e3a0f
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- 07:08 AM Revision 3417f802 (git): Update bundled gems list as of 2026-02-20
-
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- Because win32-registry needs fiddle and fiddle is a bundled gem.
[Bug #21855] -
- It's code but not formatted as such
- 02:05 AM Revision 6ea68a58 (git): [ruby/rubygems] Don't check whether a plugin needs to be installed:
- - ### Problem
When Bundler installs gems, it checks whether a gem plugin needs
to be installed.
This check (`Dir.glob`) is expensive and is hotspot when profiling
Bundler.
### Details
Bundler makes a check to see if a gems... -
01:57 AM Bug #21882 (Closed): IO::Buffer#locked leaves the buffer locked when the block raises
- Applied in changeset commit:git|b5ccab2093c9bb19ae8564a935e6fd72ec7354cc.
----------
IO::Buffer#locked: Release lock even when the block raises (#16180)
IO::Buffer#locked: Release lock even when the block raises/breaks
Previously, `IO... -
- IO::Buffer#locked: Release lock even when the block raises/breaks
Previously, `IO::Buffer#locked` leaks the lock when the block raises
an exception, or breaks.
Fixes: [Bug #21882] -
- This replaces GC-based buffer guards (rb_imemo_tmpbuf,
TypedData_Wrap_Struct) with rb_ensure to clean up malloc/xmalloc memory
when an exception occurs.
02/19/2026
- 11:37 PM Revision 06c8b1ab (git): ZJIT: Remove find() from po_from
- 11:37 PM Revision c0c97c0f (git): ZJIT: Simplify po_from to take a single BlockId
-
- This was useful when there was only a single size pool to have an easy
way of referencing the average number of objects a page could hold (this
would vary by a few in real terms because of page alignment).
But with multiple heaps, each ... -
- The embedded-to-heap path copied RSTRING_LEN(str) bytes into an
ALLOC_N buffer, missing the null terminator (and any slot padding).
Copy str_embed_capa(str) bytes instead. Always safe since we only
enter this path when str_embed_capa(str... -
10:20 PM Bug #21917: Unable to build 4.0.1 on AIX 7.2
- Thanks for the quick reply. Your second, more simple patch in https://bugs.ruby-lang.org/issues/21917#note-2 worked to resolve my build issue.
I also tried your commit 361644c0cce3235e9cc6724994c6b5711deb10b8 but the build fails with ... -
- Applied in changeset commit:git|361644c0cce3235e9cc6724994c6b5711deb10b8.
----------
[Bug #21917] Fix build on AIX -
- Or, more simply:
```diff
diff --git a/dln.c b/dln.c
index 2549f031835..3725b95fbb7 100644
--- a/dln.c
+++ b/dln.c
@@ -89,7 +89,7 @@ dln_loaderror(const char *format, ...)
}
#endif
-#if defined(HAVE_DLOPEN) && !defined(_AI... -
- Probably this may help:
```diff
diff --git a/dln.c b/dln.c
index 2549f031835..01dfccd0534 100644
--- a/dln.c
+++ b/dln.c
@@ -506,6 +506,7 @@ static void *
dln_load_and_init(const char *file, const char *init_fct_name)
{
#if... -
- https://github.com/ruby/rubygems/commit/6a187a0a99
- 09:18 PM Revision b205bf61 (git): ZJIT: Measure how much each part of compile-time costs
- 09:18 PM Revision 607af489 (git): ZJIT: Measure side-exit compile time
- Also report it as a percentage of overall compile time.
- 09:05 PM Revision c058a988 (git): ZJIT: Replace dominator set-intersection with Cooper's idom algorithm
- 09:05 PM Revision f5782840 (git): ZJIT: Add Entries superblock as single CFG root
- 09:05 PM Revision 3f5e85bf (git): ZJIT: Add LoadArg instruction for JIT entry blocks
-
- Split rb_zjit_init into rb_zjit_init_builtin_cmes (called before
ruby_init_prelude) and rb_zjit_init (called after). The prelude may
load bundler via BUNDLER_SETUP which can call Kernel.prepend, moving
core methods to an origin iclass. R... -
-
-
- Split rb_yjit_init into rb_yjit_init_builtin_cmes (called before
ruby_init_prelude) and rb_yjit_init (called after). The prelude may
load bundler via BUNDLER_SETUP which can call Kernel.prepend, moving
core methods to an origin iclass. R... -
02:43 PM Bug #21918 (Open): fiber scheduler: fiber interrupt triggers for IOs that haven't been closed
- I've been chasing an issue, which I believe is to with the recent introduction of the `fiber_interrupt` hook in ruby 4. As a reproduction I have the following snippet:
```ruby
require "socket"
require_relative "test/fiber/scheduler"... -
- Ref: https://github.com/ruby/json/issues/939
https://github.com/ruby/json/commit/05cec0cbee -
- In ripper, compared to `**nil` it is not a new event
https://github.com/ruby/prism/commit/7f5782392e -
-
-
-
- (https://github.com/ruby/prism/pull/3936)
This reverts commit https://github.com/ruby/prism/commit/641775e5fea6.
There is no need, they are not documented.
https://github.com/ruby/prism/commit/6fb4c42637 -
01:15 AM Revision da767cda (git): Fix wrong function names in `rb_bug` messages in vm_trace.c (#16196)
-
- When --zjit-trace-exits is enabled, rb_zjit_record_exit_stack was called before compile_exit restored the VM state (cfp->pc, cfp->sp, stack, locals). This ccall clobbers caller-saved registers that may hold stack/local operands, causing ...
02/18/2026
-
11:37 PM Revision e11c3cef (git): [ruby/prism] add `extern "C"` wrappers to `prism.h` when using C++
- https://github.com/ruby/prism/commit/003ff5341d
- 10:12 PM Revision 671ea6fb (git): ZJIT: Constant fold modulus (%) operations (#16168)
- Similar to the way ZJIT already folds +, -, and * operations. One
complication is that the % operator behaves differently in Ruby than in
Rust for negative values. For example in Ruby:
```
ruby -e "puts 11 % -3" # => -1
```
vs Rust:
`... -
-
- I'm attempting to build Ruby 4.0.1 on AIX 7.2. We have had successful builds of previous versions of Ruby on this platform, but are starting to see an issue when using miniruby to build Ruby:
``` shell
./miniruby -I./lib -I. -I.ext/c... -
- After a review of all callers, this doesn't appear to be needed for
correct behavior. We could potentially have a future case where it
is needed, such as a method that inserts a record into the set and
returns the inserted record (which ... -
- As we found out from YJIT, `super` from within a block needs a loop for
the running CME guard, and the current LEP based guard always fails.
Don't specialize for now so we use the fallback instead of side-exiting. -
- Previously, when dealing with a `super()` nested in a block that runs as
a method (through e.g. `define_method`), YJIT generated a guard that
never passes leading to a misidentification of the callsite as
megamorphic and an unconditional... -
- Applied in changeset commit:git|d256629bf9e194838d1837be74dcc0b8ff0bcfd6.
----------
[Bug #19831] Remove duplicate library warning
When building on macOS, we get a warning about duplicate libraries
ld: warning: ignoring duplicate ... -
- When building on macOS, we get a warning about duplicate libraries
ld: warning: ignoring duplicate libraries: '-ldl', '-lobjc', '-lpthread'
To fix it, we now append $(MAINLIBS) to LIBRUBYARG_SHARED (when shared
is enabled), matchin... -
-
- Applied in changeset commit:git|91be23cd961aa937701214ba5f50c698301c5e26.
----------
[Bug #21868] Use ruby allocator for prism
If we wan't prism to use the ruby allocator, we should
include it as early as possible. -
- If we wan't prism to use the ruby allocator, we should
include it as early as possible. -
-
-
- Fix up git:e875ca2e7494.
-
-
04:34 AM Revision e9806c21 (git): ZJIT: Count side-exit code size and report ratio to code region (#16191)
- railsbench stats:
side_exit_size: 5,340,736
code_region_bytes: 15,122,432
side_exit_size_ratio: 35.3% -
- 01:17 AM Revision a4a6de0b (git): [ruby/rubygems] Fix Bundler crashing when it tries to install plugin:
- - ### Problem
Bundler crashes when a Gemfile contains a plugin and you
try to run `bundle install` while setting the BUNDLE_WITHOUT=default
value.
### Context
Setting the BUNDLE_WITHOUT=default is something that some deploym... -
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-
-
-