Style/ArgumentsForwarding false positive

[benburkert]

Given a method with a keyword argument and kwargs:

alias foo_without_bar foo

def foo(bar: nil, **opts, &blk)
  foo_without_bar(**opts, &blk)

  do_something_with(bar) unless bar.nil?
end

Expected behavior

The Style/ArgumentsForwarding cop should not trigger on this method, because replaceing bar: nil, **opts will a) include :bar in the arguments to foo_without_bar b) remove the definition of the local bar variable.

Actual behavior

The following is included in the rubocop output:

foo.rb:6:9: C: [Correctable] Style/ArgumentsForwarding: Use shorthand syntax ... for arguments forwarding.
def foo(bar: nil, **opts, &blk)
        ^^^^^^^^^^^^^^^^^^^^^^
foo.rb:7:19: C: [Correctable] Style/ArgumentsForwarding: Use shorthand syntax ... for arguments forwarding.
  foo_without_bar(**opts, &blk)
                  ^^^^^^^^^^^^

Steps to reproduce the problem

Run rubocop 1.56.1 on this file:

# frozen_string_literal: true

alias foo_without_bar foo

def foo(bar: nil, **opts, &blk)
  foo_without_bar(**opts, &blk)

  do_something_with(bar) unless bar.nil?
end

RuboCop version

$ bundle exec rubocop -V
1.56.1 (using Parser 3.2.2.3, rubocop-ast 1.29.0, running on ruby 3.1.4) [x86_64-darwin22]
  - rubocop-capybara 2.18.0
  - rubocop-factory_bot 2.23.1
  - rubocop-minitest 0.31.0
  - rubocop-performance 1.19.0
  - rubocop-rails 2.20.2
  - rubocop-rake 0.6.0
  - rubocop-rspec 2.23.2