Style/ConditionalAssignment when hitting for ... in loops

[tomdracz]

I've just updated Rubocop to release 0.49.0 and hitting error while hitting for ... in loops. I pinpointed the issue to the use of Style/ConditionalAssignment cop while enforcing assign_inside_condition
Stack trace below:

An error occurred while Style/ConditionalAssignment cop was inspecting An error occurred while Style/ConditionalAssignment cop was inspecting /Users/tom/Hanover/test.rb:1:4.
undefined method `begin_type?' for :i:Symbol
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/cop/style/conditional_assignment.rb:304:in `assignment_node'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/cop/style/conditional_assignment.rb:274:in `check_assignment_to_condition'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/cop/style/conditional_assignment.rb:233:in `block (2 levels) in <class:ConditionalAssignment>'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/cop/commissioner.rb:44:in `block (2 levels) in on_lvasgn'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/cop/commissioner.rb:106:in `with_cop_error_handling'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/cop/commissioner.rb:43:in `block in on_lvasgn'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/cop/commissioner.rb:42:in `each'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/cop/commissioner.rb:42:in `on_lvasgn'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/ast/traversal.rb:161:in `block in on_case'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/ast/traversal.rb:160:in `each'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/ast/traversal.rb:160:in `on_case'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/cop/commissioner.rb:48:in `on_for'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/ast/traversal.rb:12:in `walk'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/cop/commissioner.rb:60:in `investigate'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/cop/team.rb:112:in `investigate'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/cop/team.rb:100:in `offenses'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/cop/team.rb:42:in `inspect_file'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/runner.rb:258:in `inspect_file'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/runner.rb:205:in `block in do_inspection_loop'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/runner.rb:237:in `block in iterate_until_no_changes'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/runner.rb:230:in `loop'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/runner.rb:230:in `iterate_until_no_changes'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/runner.rb:201:in `do_inspection_loop'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/runner.rb:111:in `block in file_offenses'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/runner.rb:121:in `file_offense_cache'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/runner.rb:109:in `file_offenses'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/runner.rb:100:in `process_file'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/runner.rb:78:in `block in each_inspected_file'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/runner.rb:75:in `each'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/runner.rb:75:in `reduce'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/runner.rb:75:in `each_inspected_file'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/runner.rb:67:in `inspect_files'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/runner.rb:39:in `run'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/cli.rb:82:in `execute_runner'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/lib/rubocop/cli.rb:28:in `run'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/bin/rubocop:13:in `block in <top (required)>'
/Users/tom/.rvm/rubies/ruby-2.4.1/lib/ruby/2.4.0/benchmark.rb:308:in `realtime'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/gems/rubocop-0.49.0/bin/rubocop:12:in `<top (required)>'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/bin/rubocop:23:in `load'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/bin/rubocop:23:in `<main>'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/bin/ruby_executable_hooks:15:in `eval'
/Users/tom/.rvm/gems/ruby-2.4.1@hanover/bin/ruby_executable_hooks:15:in `<main>'

---

Expected behavior

No errors, apart from style errors appear

Actual behavior

Rubocop error occurs

Steps to reproduce the problem

Run rubocop on simple file like:

for i in [1,2,3]
  puts i
end

With cop

Style/ConditionalAssignment:
  EnforcedStyle: assign_inside_condition

RuboCop version

$ rubocop -V
0.49.0 (using Parser 2.4.0.0, running on ruby 2.4.1 x86_64-darwin16)