Style/FileName with ExpectMatchingDefinition true errors on an empty file

[agrimm]

Given a configuration of

Style/FileName:
  ExpectMatchingDefinition: true

RuboCop gives an error for an empty file foo.rb:

Andrews-Air:[redacted] agrimm$ bundle exec rubocop --only Style/FileName -d foo.rb 
For /Users/agrimm/rails/[redacted]: configuration from /Users/agrimm/rails/[redacted]/.rubocop.yml
Default configuration from /Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/config/default.yml
Inheriting configuration from /Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/config/enabled.yml
Inheriting configuration from /Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/config/disabled.yml
Inspecting 1 file
Scanning /Users/agrimm/rails/[redacted]/foo.rb
An error occurred while Style/FileName cop was inspecting /Users/agrimm/rails/[redacted]/foo.rb.
undefined method `type' for nil:NilClass
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/cop/util.rb:86:in `on_node'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/cop/style/file_name.rb:69:in `find_class_or_module'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/cop/style/file_name.rb:25:in `investigate'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/cop/commissioner.rb:81:in `block (2 levels) in invoke_custom_processing'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/cop/commissioner.rb:87:in `with_cop_error_handling'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/cop/commissioner.rb:80:in `block in invoke_custom_processing'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/cop/commissioner.rb:77:in `each'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/cop/commissioner.rb:77:in `invoke_custom_processing'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/cop/commissioner.rb:51:in `investigate'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/cop/team.rb:36:in `inspect_file'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/runner.rb:193:in `inspect_file'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/runner.rb:163:in `block in do_inspection_loop'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/runner.rb:157:in `loop'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/runner.rb:157:in `do_inspection_loop'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/runner.rb:86:in `process_file'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/runner.rb:58:in `block in inspect_files'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/runner.rb:56:in `each'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/runner.rb:56:in `inspect_files'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/runner.rb:34:in `run'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/lib/rubocop/cli.rb:29:in `run'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/bin/rubocop:13:in `block in <top (required)>'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/1.9.1/benchmark.rb:295:in `realtime'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bundler/gems/rubocop-9f9b655d6d72/bin/rubocop:12:in `<top (required)>'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bin/rubocop:23:in `load'
/Users/agrimm/.rbenv/versions/1.9.3-p550/lib/ruby/gems/1.9.1/bin/rubocop:23:in `<main>'
.

1 file inspected, no offenses detected

1 error occurred:
An error occurred while Style/FileName cop was inspecting /Users/agrimm/rails/[redacted]/foo.rb.
Errors are usually caused by RuboCop bugs.
Please, report your problems to RuboCop's issue tracker.
Mention the following information in the issue report:
0.35.1 (using Parser 2.3.0.pre.6, running on ruby 1.9.3 x86_64-darwin14.5.0)

Finished in 0.292642 seconds

RuboCop version info:

GIT
  remote: git://github.com/bbatsov/rubocop.git
  revision: 9f9b655d6d726bf46939b7c05c6095e0c23de961

[alexdowad]

Whoops! Thanks for catching this!

[alexdowad]

Just pushed a fix to my open PR.