[ruby-core:113904] [Ruby master Bug#19731] Can’t call an instance method inside an Endless method definition

14 Jun 2023

      Issue #19731 has been updated by mame (Yusuke Endoh).

Currently it is an expected behavior because it is parsed as `(def show = puts 'ok') if params`. Related to #19392.

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Bug #19731: Can’t call an instance method inside an Endless method definition
https://bugs.ruby-lang.org/issues/19731#change-103556

* Author: ttanimichi (Tsukuru Tanimichi)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.2.2 (2023-03-30 revision e51014f9c0) [arm64-darwin22]
* Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN
----------------------------------------
Can’t call an instance method inside an Endless method definition.

```
$ ruby -v
ruby 3.2.2 (2023-03-30 revision e51014f9c0) [arm64-darwin22]

$ cat withend.rb
class A
  def show
    puts 'ok' if params
  end

  def params
    42
  end
end

A.new.show

$ ruby withend.rb
ok

$ cat endless.rb
class A
  def show = puts 'ok' if params

  def params
    42
  end
end

A.new.show

$ ruby endless.rb
endless.rb:2:in `<class:A>': undefined local variable or method `params' for A:Class (NameError)

  def show = puts 'ok' if params
                          ^^^^^^
	from endless.rb:1:in `<main>'
exit status: 1
```

But, the example below works fine. Is this an expected behavior?

```
$ cat endless2.rb
class A
  def show = puts params

  def params
    42
  end
end

A.new.show

$ ruby endless2.rb
42
```

-- 
https://bugs.ruby-lang.org/