[ruby-core:123644] [Ruby Bug#21662] Variables other than those in the conditional score are replaced.

2 Nov 2025


      Issue #21662 has been reported by binh (binh chau).

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Bug #21662: Variables other than those in the conditional score are replaced.
https://bugs.ruby-lang.org/issues/21662

* Author: binh (binh chau)
* Status: Open
* ruby -v: 3.2.2
* Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN
----------------------------------------
```
class Bar
  attr_accessor :name
end

class Foo
  attr_accessor :bar
  def initialize(bar=nil)
    @bar = bar || Bar.new
  end

  def bug!
    if !bar.is_a?(Bar)
      bar = ''
    elsif bar.name == 'bar'
    end
  end
end

Foo.new.bug!
```


-- 
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