'Next' cop errors on a method invoking super with 2+ args and a non-empty block.

[smangelsdorf]

I've hit a Rubocop failure with a certain snippet of Ruby, and I've managed to simplify it to:

def x(a)
  super(a, a) { a }
end

Strangely:

• If I remove one of the parameters to super(), it works
• If I use any method name instead of super, it works
• If I remove the reference to a inside the block, it works

The original was in a module, hence the use of super, but the error is identical when not in a module. The error I'm seeing is:

1 error occurred:
An error occurred while Next cop was inspecting /Users/shaun/Projects/status/test.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:
0.22.0 (using Parser 2.1.9, running on ruby 2.1.2 x86_64-darwin13.0)

I invoked it simply as rubocop test.rb, and my .rubocop.yml contains:

AllCops:
  Exclude:
    - db/schema.rb

Documentation:
  Enabled: false

I enabled debug output and I see:

no implicit conversion of Parser::AST::Node into String
/Users/shaun/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rubocop-0.22.0/lib/rubocop/cop/style/next.rb:59:in `match'
/Users/shaun/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rubocop-0.22.0/lib/rubocop/cop/style/next.rb:59:in `method?'
/Users/shaun/.rbenv/versions/2.1.2/lib/ruby/gems/2.1.0/gems/rubocop-0.22.0/lib/rubocop/cop/style/next.rb:35:in `on_block'

Let me know if there's any further help I can offer.

[geniou]

I take a look.

[geniou]

@smangelsdorf thanks to the great describing of the bug it was easy to provide a fix.