[ruby-core:115730] [Ruby master Bug#20062] Numbered parameters are broken in Ruby 3.3-dev

Issue #20062 has been updated by k0kubun (Takashi Kokubun).

Assignee set to nobu (Nobuyoshi Nakada)

```
$ ./miniruby -v /tmp/test.rb
ruby 3.3.0dev (2023-05-02T09:27:10Z master 31774bd565) [x86_64-linux]
"a"
"a"
```

```
$ ./miniruby -v /tmp/test.rb
ruby 3.3.0dev (2023-05-02T08:39:18Z master b15e88e0fc) [x86_64-linux]
/tmp/test.rb: /tmp/a.rb:8: numbered parameter is already used in (SyntaxError)
/tmp/test.rb:2: outer block here
```

It seems to have been broken since https://github.com/ruby/ruby/pull/7779.

----------------------------------------
Bug #20062: Numbered parameters are broken in Ruby 3.3-dev
https://bugs.ruby-lang.org/issues/20062#change-105663

* Author: osyo (manga osyo)
* Status: Open
* Priority: Normal
* Assignee: nobu (Nobuyoshi Nakada)
* ruby -v: ruby 3.3.0dev (2023-12-13T13:16:11Z master f390c51b15) [x86_64-linux]
* Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN
----------------------------------------
Define Numbered parameters and a method in one block and then reference Numbered parameters in another block, you will get a SyntaxError in Ruby 3.3.
This is not a problem in Ruby 3.2.

```ruby
'a'.tap do
  p _1

  def f1; end
end

'a'.tap do
  p _1
end

__END__
output:
Ruby 3.2.2 =>
"a"
"a"

Ruby 3.3.0dev(2023-12-13T13:16:11Z master f390c51b15) =>
/path/to/test.rb:
/path/to/test.rb:8: numbered parameter is already used in (SyntaxError)
/path/to/test.rb:2: outer block here
```

I noticed this while checking the operation of https://bugs.ruby-lang.org/issues/18966.
I haven't checked, but https://bugs.ruby-lang.org/issues/19619 may be related.




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