Issue #21662 has been updated by nobu (Nobuyoshi Nakada). Description updated Status changed from Open to Feedback I try to guesstimate your intension by telepathy. binh (binh chau) wrote:

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

You might had expected the third `bar` is a `Bar`. In fact, the first `bar` in `!bar.is_a?(Bar)` is the attribute. But the assignment in the next line makes the local variable `bar` regardless whether this line is executed. So all `bar` after here in this method, including in the next `elsif` line, are this local variable, that is an empty string or `nil` (when the `elsif` condition is executed). ---------------------------------------- Bug #21662: Variables other than those in the conditional score are replaced. https://bugs.ruby-lang.org/issues/21662#change-115028 * Author: binh (binh chau) * Status: Feedback * ruby -v: 3.2.2 * Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- ```ruby 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! ``` -- https://bugs.ruby-lang.org/