Bug in Rails/DeprecatedActiveModelErrorsMethods

[bquorning]

When running bundle exec rubocop --debug --only=Rails/DeprecatedActiveModelErrorsMethods -- test.rb against a file test.rb containing

result = "foo"
result.errors.keys

I get an error:

An error occurred while Rails/DeprecatedActiveModelErrorsMethods cop was inspecting /Users/bquorning/Code/rubocop/rubocop-rails/test.rb:2:0.
undefined method `method?' for s(:lvar, :result):RuboCop::AST::Node
Did you mean?  method
               methods
/Users/bquorning/Code/rubocop/rubocop-rails/lib/rubocop/cop/rails/deprecated_active_model_errors_methods.rb:122:in `autocorrect'
/Users/bquorning/Code/rubocop/rubocop-rails/lib/rubocop/cop/rails/deprecated_active_model_errors_methods.rb:112:in `block (2 levels) in on_send'
/Users/bquorning/.gem/ruby/2.7.6/bundler/gems/rubocop-a5de777eb80f/lib/rubocop/cop/base.rb:342:in `correct'
/Users/bquorning/.gem/ruby/2.7.6/bundler/gems/rubocop-a5de777eb80f/lib/rubocop/cop/base.rb:127:in `add_offense'
/Users/bquorning/Code/rubocop/rubocop-rails/lib/rubocop/cop/rails/deprecated_active_model_errors_methods.rb:109:in `block in on_send'
/Users/bquorning/Code/rubocop/rubocop-rails/lib/rubocop/cop/rails/deprecated_active_model_errors_methods.rb:58:in `any_manipulation?'
/Users/bquorning/Code/rubocop/rubocop-rails/lib/rubocop/cop/rails/deprecated_active_model_errors_methods.rb:108:in `on_send'
[...]

RuboCop version

$ ❯ bundle exec rubocop -V
1.30.0 (using Parser 3.1.2.0, rubocop-ast 1.18.0, running on ruby 2.7.6 x86_64-darwin20)
  - rubocop-performance 1.14.2
  - rubocop-rails 2.15.0
  - rubocop-rspec 2.11.1