Layout/IndentFirstParameter crashing on method definition

[NoahTheDuke]

Layout/IndentFirstParameter crashes on the following code:

module Foo
  def bar(
    arg: nil
  )
    true
  end
end

Scanning /Users/noah/dev/test.rb
An error occurred while Layout/IndentFirstParameter cop was inspecting /Users/noah/dev/test.rb:2:2.
Unknown style special_for_inner_method_call_in_parentheses selected!
/Users/noah/.rbenv/versions/2.5.3/lib/ruby/gems/2.5.0/gems/rubocop-0.68.0/lib/rubocop/cop/mixin/configurable_enforced_style.rb:67:in `style'

---

Expected behavior

Don't crash, potentially throw a linting error.

Actual behavior

Crashes.

Steps to reproduce the problem

See code above.

RuboCop version

$ rubocop -V
0.68.0 (using Parser 2.6.3.0, running on ruby 2.5.3 x86_64-darwin18)

[mensfeld]

Can confirm. Same on my side.

[bbatsov]

@maxh Can you take a look? Seems we'll need to do a quick bugfix release for this.

[erikjenks]

Can confirm seeing this with ruby 2.6.0 as well

[Darhazer]

The EnforcedStyle should be set to either consistent or align_parentheses.
Might be used as a workaround (set EnforcedStyle for the cop in .rubocop.yml) until a new version is released

[phene]

Neither consistent nor align_parentheses enforces the style used in the example above. I ended up disabling it until it's fixed.

[maxh]

Sorry to miss this! Thanks for the fix, @Drenmi. I've reconfigured my GitHub settings so I am properly notified about messages in this repo. I just noticed #6936 and created #7072. Feel free to tag me if there's anything else I should look into -- I should see it now.