Issue #20444 has been updated by nobu (Nobuyoshi Nakada).
That example does not need `Ractor`.
```ruby
class MyStop < ::StopIteration
attr_reader :result
def initialize(result)
@result = result
end
end
block = proc {raise StopIteration, 3}
p Thread.start {loop {block.call}}.value #=> nil
block = proc { raise MyStop, 3 }
p Thread.start {loop {block.call}}.value #=> 3
```
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Feature #20444: Kernel#loop: returning the "result" value of StopIteration
doesn't work when raised directly
https://bugs.ruby-lang.org/issues/20444#change-108130
* Author: esad (Esad Hajdarevic)
* Status: Feedback
----------------------------------------
There was a
https://bugs.ruby-lang.org/issues/11498 a while ago which was merged in, but I
was surprised to find out that raising `StopIteration` in a loop like
`loop { raise StopIteration.new(3) }`
returns nil and not 3.
--
https://bugs.ruby-lang.org/