From: "nagachika (Tomoyuki Chikanaga) via ruby-core" <ruby-core@...>
Date: 2024-07-21T03:25:26+00:00
Subject: [ruby-core:118652] [Ruby master Bug#19619] Numbered parameters don't work with method definition with parameters

Issue #19619 has been updated by nagachika (Tomoyuki Chikanaga).

Backport changed from 3.0: REQUIRED, 3.1: REQUIRED, 3.2: REQUIRED to 3.0: REQUIRED, 3.1: REQUIRED, 3.2: DONE

ruby_3_2 commit:483ad38c6968feb1990f36d48d14fd55988d2150 merged revision(s) commit:b15e88e0fcccb03b9cc5e4c1478ec9b10e26c961.

----------------------------------------
Bug #19619: Numbered parameters don't work with method definition with parameters
https://bugs.ruby-lang.org/issues/19619#change-109180

* Author: okuramasafumi (Masafumi OKURA)
* Status: Closed
* ruby -v: 3.2.2
* Backport: 3.0: REQUIRED, 3.1: REQUIRED, 3.2: DONE
----------------------------------------
This works:

```ruby
class Foo
  def bar(baz) = 'foo'
end

p Foo.new.bar('baz')
```

This also works:

```ruby
o = Object.new
o.tap { |obj| def obj.bar(baz) = 'foo' }
p o.bar('baz')
```

Even this works:

```ruby
o = Object.new
o.tap { def _1.bar = 'foo' }
p o.bar
```

But this DOESN'T work:

```ruby
o = Object.new
o.tap { def _1.bar(baz) = 'foo' }
p o.bar('baz')
```

So, when we define a method with parameters on an instance given as numbered parameters, it doesn't work. If we change one condition (definition way, parameter existence, and so on), it works.



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