Ruby Issue Tracking System

08/31/2025

12:52 PM Ruby Bug #21559 (Open): Unicode normalization nfd -> nfc -> nfd is not reversible

I expect `nfd(nfc(str)) == nfd(str)` but found a string that doesn't.
~~~ruby
# Ruby 3.1 - 3.5
str = "s\u{11930}... tompng (tomoya ishida)

08/29/2025

12:46 PM Ruby Feature #20163: Introduce #bit_count method on Integer

I also think popcount of a negative number should raise error because of the ambiguity.
One way to extend popcount t... tompng (tomoya ishida)

07/29/2025

04:34 PM Ruby Revision a66e4f21 (git): Improve performance of bignum[beg, len] (#14007)

Implement rb_big_aref2.
Taking a small slice from large bignum was slow in rb_int_aref2. tompng (tomoya ishida)

07/23/2025

05:12 PM Ruby Revision 5e5cec1b (git): Fix bigand_int edgecase returning false (#13987)

tompng (tomoya ishida)

07/22/2025

11:25 AM Ruby Feature #21515: Add `&return` as sugar for `x=my_calculation; return x if x`

Instead of adding new syntax to `return` part, how about a new keyword to reference if-predicate part?
It can be use... tompng (tomoya ishida)

07/08/2025

11:24 AM Ruby Bug #19473: can't be called from trap context (ThreadError) is too limiting

Locking multiple mutex with a fixed order is considered to be deadlock-safe, but permitting mutex in signal_handler, ... tompng (tomoya ishida)

06/23/2025

05:56 PM Ruby Bug #21449 (Closed): Set#divide is order dependent and not working correctly

Applied in changeset commit:git|67346a7d94b101acc00c177b01ad0aabfef605a8.
----------
[Bug #21449] Fix Set#divide{|a,... tompng (tomoya ishida)

01:23 PM Ruby Bug #21449: Set#divide is order dependent and not working correctly

pull request https://github.com/ruby/ruby/pull/13680 tompng (tomoya ishida)

01:15 PM Ruby Bug #21449 (Closed): Set#divide is order dependent and not working correctly

~~~ruby
Set[0,1,2,3].divide{(_1 - _2).abs == 1}
#=> #<Set: {#<Set: {0, 1, 2, 3}>}>
Set[0,2,3,1].divide{(_1 - _2)... tompng (tomoya ishida)

05:56 PM Ruby Revision 67346a7d (git): [Bug #21449] Fix Set#divide{|a,b|} using Union-find structure (#13680)

* [Bug #21449] Fix Set#divide{|a,b|} using Union-find structure
Implements Union-find structure with path compressio... tompng (tomoya ishida)