Lint/EndAlignment: AlignWith: variable

[bquorning]

@alexdowad It looks like #2539 broke Lint/EndAlignment with AlignWith: variable configuration:

» cat .rubocop.yml
Lint/EndAlignment:
  AlignWith: variable

» cat test.rb
# encoding: utf-8
# Documentation for Foo
class Foo
  def bar
  end
end

» ./bin/rubocop -d test.rb
For /Users/bquorning/Code/rubocop: configuration from /Users/bquorning/Code/rubocop/.rubocop.yml
Default configuration from /Users/bquorning/Code/rubocop/config/default.yml
Inheriting configuration from /Users/bquorning/Code/rubocop/config/enabled.yml
Inheriting configuration from /Users/bquorning/Code/rubocop/config/disabled.yml
Inspecting 1 file
Scanning /Users/bquorning/Code/rubocop/test.rb
An error occurred while Lint/EndAlignment cop was inspecting /Users/bquorning/Code/rubocop/test.rb.
undefined method `source' for nil:NilClass
/Users/bquorning/Code/rubocop/lib/rubocop/cop/mixin/end_keyword_alignment.rb:31:in `check_end_kw_alignment'
/Users/bquorning/Code/rubocop/lib/rubocop/cop/lint/end_alignment.rb:102:in `check_other_alignment'
/Users/bquorning/Code/rubocop/lib/rubocop/cop/lint/end_alignment.rb:39:in `on_class'
/Users/bquorning/Code/rubocop/lib/rubocop/cop/commissioner.rb:37:in `block (2 levels) in on_class'
/Users/bquorning/Code/rubocop/lib/rubocop/cop/commissioner.rb:87:in `with_cop_error_handling'
/Users/bquorning/Code/rubocop/lib/rubocop/cop/commissioner.rb:36:in `block in on_class'
/Users/bquorning/Code/rubocop/lib/rubocop/cop/commissioner.rb:34:in `each'
/Users/bquorning/Code/rubocop/lib/rubocop/cop/commissioner.rb:34:in `on_class'
/Users/bquorning/.gem/ruby/2.2.3/gems/ast-2.2.0/lib/ast/processor/mixin.rb:259:in `process'
/Users/bquorning/Code/rubocop/lib/rubocop/cop/commissioner.rb:53:in `investigate'
/Users/bquorning/Code/rubocop/lib/rubocop/cop/team.rb:36:in `inspect_file'
/Users/bquorning/Code/rubocop/lib/rubocop/runner.rb:206:in `inspect_file'
/Users/bquorning/Code/rubocop/lib/rubocop/runner.rb:172:in `block in do_inspection_loop'
/Users/bquorning/Code/rubocop/lib/rubocop/runner.rb:166:in `loop'
/Users/bquorning/Code/rubocop/lib/rubocop/runner.rb:166:in `do_inspection_loop'
/Users/bquorning/Code/rubocop/lib/rubocop/runner.rb:91:in `process_file'
/Users/bquorning/Code/rubocop/lib/rubocop/runner.rb:58:in `block in inspect_files'
/Users/bquorning/Code/rubocop/lib/rubocop/runner.rb:56:in `each'
/Users/bquorning/Code/rubocop/lib/rubocop/runner.rb:56:in `inspect_files'
/Users/bquorning/Code/rubocop/lib/rubocop/runner.rb:34:in `run'
/Users/bquorning/Code/rubocop/lib/rubocop/cli.rb:29:in `run'
./bin/rubocop:13:in `block in <main>'
/Users/bquorning/.rubies/ruby-2.2.3/lib/ruby/2.2.0/benchmark.rb:303:in `realtime'
./bin/rubocop:12:in `<main>'
.

1 file inspected, no offenses detected

1 error occurred:
An error occurred while Lint/EndAlignment cop was inspecting /Users/bquorning/Code/rubocop/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:
0.35.1 (using Parser 2.3.0.pre.6, running on ruby 2.2.3 x86_64-darwin13)
Finished in 0.09646250499645248 seconds

[alexdowad]

Thanks @bquorning! Just pushing a fix to my open PR. Also found and fixed another bug with Lint/EndAlignment while working on this one.