Rubocop 1.45.0 - Style/RedundantCondition: undefined method `kwsplat_type?' for nil:NilClass

[gnomonunes]

---

Expected behavior

Cop Style/RedundantCondition inspects without breaking.

Actual behavior

Cop Style/RedundantCondition breaks during inspection with the following error:

Scanning condition.rb
An error occurred while Style/RedundantCondition cop was inspecting condition.rb:5:6.
undefined method `kwsplat_type?' for nil:NilClass
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/style/redundant_condition.rb:172:in `argument_with_operator?'
...

Steps to reproduce the problem

1. Create a file with the following code:

# condition.rb
class Condition
  def setup_user(user)
    Foo.setup do |setup|
      user.present? ? setup.set_user(user) : setup.set_user({})
    end
  end
end

2. Inspect the code with Style/RedundantCondition cop enabled:

rubocop condition.rb -d

Output:

Use parallel by default.
Skipping parallel inspection: only a single file needs inspection
Inspecting 1 file
Scanning condition.rb
An error occurred while Style/RedundantCondition cop was inspecting condition.rb:4:6.
undefined method `kwsplat_type?' for nil:NilClass
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/style/redundant_condition.rb:172:in `argument_with_operator?'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/style/redundant_condition.rb:158:in `single_argument_method?'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/style/redundant_condition.rb:151:in `branches_have_method?'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/style/redundant_condition.rb:128:in `synonymous_condition_and_branch?'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/style/redundant_condition.rb:84:in `offense?'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/style/redundant_condition.rb:45:in `on_if'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/commissioner.rb:107:in `public_send'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/commissioner.rb:107:in `block (2 levels) in trigger_responding_cops'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/commissioner.rb:171:in `with_cop_error_handling'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/commissioner.rb:106:in `block in trigger_responding_cops'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/commissioner.rb:105:in `each'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/commissioner.rb:105:in `trigger_responding_cops'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/commissioner.rb:69:in `on_if'
.rvm/gems/ruby-2.7.2/gems/rubocop-ast-1.24.1/lib/rubocop/ast/traversal.rb:158:in `on_block'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/commissioner.rb:71:in `on_block'
.rvm/gems/ruby-2.7.2/gems/rubocop-ast-1.24.1/lib/rubocop/ast/traversal.rb:154:in `on_def'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/commissioner.rb:71:in `on_def'
.rvm/gems/ruby-2.7.2/gems/rubocop-ast-1.24.1/lib/rubocop/ast/traversal.rb:154:in `on_class'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/commissioner.rb:71:in `on_class'
.rvm/gems/ruby-2.7.2/gems/rubocop-ast-1.24.1/lib/rubocop/ast/traversal.rb:20:in `walk'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/commissioner.rb:87:in `investigate'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/team.rb:155:in `investigate_partial'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cop/team.rb:97:in `investigate'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:345:in `block in inspect_file'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:344:in `each'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:344:in `flat_map'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:344:in `inspect_file'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:287:in `block in do_inspection_loop'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:321:in `block in iterate_until_no_changes'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:314:in `loop'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:314:in `iterate_until_no_changes'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:283:in `do_inspection_loop'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:164:in `block in file_offenses'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:189:in `file_offense_cache'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:163:in `file_offenses'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:154:in `process_file'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:135:in `block in each_inspected_file'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:134:in `each'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:134:in `reduce'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:134:in `each_inspected_file'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:120:in `inspect_files'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/runner.rb:73:in `run'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cli/command/execute_runner.rb:26:in `block in execute_runner'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cli/command/execute_runner.rb:52:in `with_redirect'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cli/command/execute_runner.rb:25:in `execute_runner'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cli/command/execute_runner.rb:17:in `run'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cli/command.rb:11:in `run'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cli/environment.rb:18:in `run'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cli.rb:118:in `run_command'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cli.rb:125:in `execute_runners'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cli.rb:51:in `block in run'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cli.rb:77:in `profile_if_needed'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/lib/rubocop/cli.rb:43:in `run'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/exe/rubocop:19:in `block in <top (required)>'
.rvm/rubies/ruby-2.7.2/lib/ruby/2.7.0/benchmark.rb:308:in `realtime'
.rvm/gems/ruby-2.7.2/gems/rubocop-1.45.0/exe/rubocop:19:in `<top (required)>'
.rvm/gems/ruby-2.7.2/bin/rubocop:23:in `load'
.rvm/gems/ruby-2.7.2/bin/rubocop:23:in `<main>'
.rvm/gems/ruby-2.7.2/bin/ruby_executable_hooks:22:in `eval'
.rvm/gems/ruby-2.7.2/bin/ruby_executable_hooks:22:in `<main>'

1 file inspected, no offenses detected

1 error occurred:
An error occurred while Style/RedundantCondition cop was inspecting condition.rb:4:6.
Errors are usually caused by RuboCop bugs.
Please, report your problems to RuboCop's issue tracker.
https://github.com/rubocop/rubocop/issues

Mention the following information in the issue report:
1.45.0 (using Parser 3.2.0.0, rubocop-ast 1.24.1, running on ruby 2.7.2) [x86_64-darwin21]
Finished in 0.2468809997662902 seconds

RuboCop version

$  bundle exec rubocop -V
1.45.0 (using Parser 3.2.0.0, rubocop-ast 1.24.1, running on ruby 2.7.2) [x86_64-darwin21]