Parse error "A" with "--rails --only Rails/Date" option

[akicho8]

$ echo "A" > a.rb
$ rubocop -d --rails --only Rails/Date a.rb
Inspecting 1 file
Scanning /private/tmp/a.rb
For /private/tmp: configuration from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/config/default.yml
Inheriting configuration from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/config/enabled.yml
Inheriting configuration from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/config/disabled.yml
An error occurred while Rails/Date cop was inspecting /private/tmp/a.rb.
undefined method `send_type?' for nil:NilClass
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/lib/rubocop/cop/rails/date.rb:99:in `method_send?'
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/lib/rubocop/cop/rails/date.rb:51:in `on_const'
(eval):5:in `block (2 levels) in on_const'
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/lib/rubocop/cop/commissioner.rb:92:in `with_cop_error_handling'
(eval):4:in `block in on_const'
(eval):2:in `each'
(eval):2:in `on_const'
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/ast-2.1.0/lib/ast/processor/mixin.rb:259:in `process'
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/lib/rubocop/cop/commissioner.rb:52:in `investigate'
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/lib/rubocop/cop/team.rb:33:in `inspect_file'
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/lib/rubocop/runner.rb:135:in `inspect_file'
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/lib/rubocop/runner.rb:106:in `block in do_inspection_loop'
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/lib/rubocop/runner.rb:100:in `loop'
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/lib/rubocop/runner.rb:100:in `do_inspection_loop'
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/lib/rubocop/runner.rb:78:in `process_file'
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/lib/rubocop/runner.rb:53:in `block in inspect_files'
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/lib/rubocop/runner.rb:51:in `each'
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/lib/rubocop/runner.rb:51:in `inspect_files'
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/lib/rubocop/runner.rb:30:in `run'
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/lib/rubocop/cli.rb:26:in `run'
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/bin/rubocop:13:in `block in <top (required)>'
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/2.2.0/benchmark.rb:303:in `realtime'
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rubocop-0.33.0/bin/rubocop:12:in `<top (required)>'
/usr/local/var/rbenv/versions/2.2.3/bin/rubocop:23:in `load'
/usr/local/var/rbenv/versions/2.2.3/bin/rubocop:23:in `<main>'
.

1 file inspected, no offenses detected

1 error occurred: 
An error occurred while Rails/Date cop was inspecting /private/tmp/a.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: 
0.33.0 (using Parser 2.2.2.6, running on ruby 2.2.3 x86_64-darwin13)
Finished in 0.10695106885395944 seconds

[akicho8]

Thanks 👍