Ruby Issue Tracking System

07/19/2023

06:43 AM Ruby Feature #19775 (Closed): Use the callback `main::const_added`

In #17881, it was accepted that `Module#const_added` is called when there is a new constant added to the namespace of the module.
Since `main` can also serve as a namespace, it should also be able to use this callback.
```ruby
def c... UlyssesZhan (Ulysses Zhan)

02/12/2021

09:27 AM Ruby Bug #17623 (Closed): irb starts with some local variables already defined

``` ruby
irb(main):001:0> a = 1
=> 1
irb(main):002:0> def f = a
=> :f
irb(main):003:0> f
=> "D:/Ruby30-x64/lib/ruby/gems/3.0.0/gems/irb-1.3.0/exe/irb"
```
I have not idea what it means.
The codes just work fine outside irb.
May... UlyssesZhan (Ulysses Zhan)

04/21/2020

10:37 AM Ruby Bug #16797: Array#flatten not checking `respond_to? :to_ary`

nobu (Nobuyoshi Nakada) wrote in #note-1:
> Read the error message.
> ...
Read what I wrote:
> It should check whether an object responds to to_ary before trying to convert it into an array.
I know it used `to_ary` method and got a... UlyssesZhan (Ulysses Zhan)

04/17/2020

10:04 AM Ruby Bug #16797 (Rejected): Array#flatten not checking `respond_to? :to_ary`

```ruby
def (a = Object.new).method_missing(...)
Object.new
end
[a].flatten # TypeError
```
It should check whether an object responds to `to_ary` before trying to convert it into an array. UlyssesZhan (Ulysses Zhan)

08:23 AM Ruby Feature #16796 (Rejected): Assigning local variables when using `case when regexp`

I want to use
```ruby
case "str"
when /s(?<mid>.)r/
p mid
end
```
instead of
```ruby
case
when /s(?<mid>.)r/ =~ "str"
p mid
end
```
I also do not like using `$1`.
This feature is extremely useful when there are a lot... UlyssesZhan (Ulysses Zhan)

02/09/2020

07:59 AM Ruby Bug #16617 (Closed): I can have instance methods bound to objects which are not their owner

Usually, an UnboundMethod can only be bound to objects of its owner. However, sometimes the limitations can be circumvented. See the following example:
```ruby
class A
def foo
self.class
end
end
class B
end
module R
Bar = ... UlyssesZhan (Ulysses Zhan)

08/16/2019

08:34 AM Ruby Bug #16107 (Closed): Module#refine and Module#using behaved unexpectedly

The issue happened when I tried to run the code below:
``` ruby
# Main.rb
class A
end
class B
end
module M1
refine A do
def foo *args
puts "foo"
end
end
end
using M1
module M2
def self.enable_foo
refin... UlyssesZhan (Ulysses Zhan)