From: "rockorequin (rocko requin) via ruby-core" <ruby-core@...>
Date: 2023-01-11T02:37:55+00:00
Subject: [ruby-core:111775] [Ruby master Bug#19330] ruby 3.2.0 parameter autosplat breaks call using (*args, &block)

Issue #19330 has been reported by rockorequin (rocko requin).

----------------------------------------
Bug #19330: ruby 3.2.0 parameter autosplat breaks call using (*args, &block)
https://bugs.ruby-lang.org/issues/19330

* Author: rockorequin (rocko requin)
* Status: Open
* Priority: Normal
* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN
----------------------------------------
The following code in Rails 6.1.7 activerecord relation.rb no longer works with ruby 3.2.0, because the call "instance_exec(*args, &block)" raises an ArgumentException:

```
def _exec_scope(*args, &block) # :nodoc:
  @delegate_to_klass = true
  _scoping(nil) { instance_exec(*args, &block) || self }
ensure
  @delegate_to_klass = false
end
```

I think it may be due to the bugfix https://bugs.ruby-lang.org/issues/18633 ("proc { |a, **kw| a } autosplats and treats empty kwargs specially").

There is more info at https://github.com/rails/rails/issues/46934, including this code to reproduce the issue:

```
gem 'rails', '=6.1.7'
require 'active_record'
class Test < ActiveRecord::Base
   scope :test, ->(arg: nil) {}
end

Test.test(arg: 1)
```

Another user in that issue report has indicated that the syntax "save(**)" in suppressor.rb raises the same exception in ruby 3.2.0:

```
def save(**) # :nodoc:
  SuppressorRegistry.suppressed[self.class.name] ? true : super
end
```

Is this intentional, ie is the syntax "instance_exec(*args, &block)" etc no longer valid in ruby 3.2.0? 

If so, could a note indicating this incompatibility perhaps be added to the release notes for 3.2.0?




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