Ruby Issue Tracking System

03/16/2026

11:49 PM Ruby Revision 4c6c02d8 (git): fix invalid nodoc comment of Pathname#plus

tompng (tomoya ishida)

03/03/2026

05:17 PM Ruby Bug #21934 (Closed): Prism and parse.y inconsistency in command call used with pattern match

These are syntax error in both parse.y and in Prism
~~~ruby
a x in pattern
a x: in pattern
a &x in pattern
a *x => pattern
a x: => pattern
a &x => pattern
~~~
These are all syntax error in parse.y, all syntax valid in Prism
~... tompng (tomoya ishida)

01:47 PM Ruby Bug #21933: Ruby::Box: named capture local variable can become nil after non-matching lines

Shorter reproduction code
~~~ruby
/(?<a>foo)/ =~ 'bar'
/(?<b>baz)/ =~ 'baz'
p b # should be present, got nil with RUBY_BOX=1
~~~
~~~ruby
/foo/ =~ 'bar'
$~
/baz/ =~ 'baz'
p $~ # should be MatchData, got nil with RUBY_BOX=1
... tompng (tomoya ishida)

02/22/2026

03:44 AM Ruby Revision ac4aebc7 (git): Use ruby-head instead of ruby-3.2 in check_misc job (#16217)

tompng (tomoya ishida)

02/08/2026

07:00 PM Ruby Bug #21870: Regexp: Warnings when using slightly overlapping \p{...} classes

I found 130 (5 sets of 26 alphabets) characters matching both `\p{S}` and `\p{Word}`.
The visual looks like alphabet-ish symbol character
~~~ruby
(0..0x10ffff).select{(s=''<<it; s=~/\p{Word}/&&s=~/\p{S}/) rescue false}.map{''<<it}.joi... tompng (tomoya ishida)

02/05/2026

01:59 AM Ruby Revision ad0ac0ec (git): [ruby/rubygems] Remove "##" from a comment to require

In RDoc, comment that starts with "##" is a metaprogramming method definition.
If it's not a metaprogramming method definition, "##" shouldn't be used.
https://github.com/ruby/rubygems/commit/b1953a3a09 tompng (tomoya ishida)

02/03/2026

05:59 PM Ruby Bug #21859: Inconsistent behaviors in Regexp lookbehind/lookahead with capture groups

> Isn't it impossible? To match, regexp needs to satisfy negative lookahead, so there should not be anything to capture.
As you wrote, captures are not available OUTSIDE of negative lookahead and also in MatchData.
But in `/(?!([a-z]... tompng (tomoya ishida)

10:58 AM Ruby Bug #21859: Inconsistent behaviors in Regexp lookbehind/lookahead with capture groups

First issue
> This should be false in both cases.
I think `Regexp.linear_time?(/(?<=(a))/)` matches in linear time.
If the issue is just for inconsistency between lookahead and lookbehind, it's not a bug.
Here's an example:
~... tompng (tomoya ishida)

01/18/2026

07:59 PM Ruby Revision b536c6a8 (git): [DOC] Remove _emphasis_ in code blocks which is not handled as emphasis anymore (#15901)

tompng (tomoya ishida)

05:25 PM Ruby Revision 37c7ee53 (git): [DOC] Replace rdoc style codeblocks with markdown style backtick codeblocks in markdown documents (#15900)

tompng (tomoya ishida)