Crash on class including ActiveModel::Model on valid? method

[net1957]

Expected behavior

Rubocop should not fail

Actual behavior

An error occurred while Rails/ActiveRecordOverride cop was inspecting D:/Dvlt/ruby/projects/_active/Db_presenter/app/models/marycmd/test.rb:9:4.
undefined method `const_name' for nil:NilClass

I have duplicated my class to a simplified one that give the same error: fail on valid?

the test.rb file:

# frozen_string_literal: true

# Marycmd module
module Marycmd
  # rfq model
  class Rfq
    include ActiveModel::Model

    def save
      valid? ? save_to_db : false
    end

    private

    def save_to_db
      true # example
    end
  end
end

the trace:

Scanning D:/Dvlt/ruby/projects/_active/Db_presenter/app/models/marycmd/test.rb
An error occurred while Rails/ActiveRecordOverride cop was inspecting D:/Dvlt/ruby/projects/_active/Db_presenter/app/models/marycmd/test.rb:9:4.
undefined method `const_name' for nil:NilClass
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/cop/rails/active_record_override.rb:42:in `on_def'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/cop/commissioner.rb:58:in `block (2 levels) in trigger_responding_cops'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/cop/commissioner.rb:106:in `with_cop_error_handling'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/cop/commissioner.rb:57:in `block in trigger_responding_cops'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/cop/commissioner.rb:56:in `each'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/cop/commissioner.rb:56:in `trigger_responding_cops'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/cop/commissioner.rb:34:in `block (2 levels) in <class:Commissioner>'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/ast/traversal.rb:50:in `block in on_begin'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/ast/traversal.rb:50:in `each'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/ast/traversal.rb:50:in `on_begin'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/cop/commissioner.rb:35:in `block (2 levels) in <class:Commissioner>'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/ast/traversal.rb:92:in `on_class'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/cop/commissioner.rb:35:in `block (2 levels) in <class:Commissioner>'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/ast/traversal.rb:150:in `on_while'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/cop/commissioner.rb:35:in `block (2 levels) in <class:Commissioner>'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/ast/traversal.rb:13:in `walk'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/cop/commissioner.rb:46:in `investigate'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/cop/team.rb:116:in `investigate'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/cop/team.rb:104:in `offenses'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/cop/team.rb:44:in `inspect_file'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/runner.rb:273:in `inspect_file'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/runner.rb:220:in `block in do_inspection_loop'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/runner.rb:252:in `block in iterate_until_no_changes'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/runner.rb:245:in `loop'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/runner.rb:245:in `iterate_until_no_changes'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/runner.rb:216:in `do_inspection_loop'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/runner.rb:119:in `block in file_offenses'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/runner.rb:137:in `file_offense_cache'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/runner.rb:117:in `file_offenses'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/runner.rb:105:in `process_file'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/runner.rb:82:in `block in each_inspected_file'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/runner.rb:81:in `each'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/runner.rb:81:in `reduce'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/runner.rb:81:in `each_inspected_file'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/runner.rb:73:in `inspect_files'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/runner.rb:39:in `run'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/cli.rb:174:in `execute_runner'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/cli.rb:75:in `execute_runners'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/lib/rubocop/cli.rb:47:in `run'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/exe/rubocop:25:in `block in <top (required)>'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/2.5.0/benchmark.rb:308:in `realtime'
D:/program/dvlt/ruby/Ruby25-x64/lib/ruby/gems/2.5.0/gems/rubocop-0.67.2/exe/rubocop:24:in `<top (required)>'
D:/program/dvlt/ruby/Ruby25-x64/bin/rubocop:23:in `load'
D:/program/dvlt/ruby/Ruby25-x64/bin/rubocop:23:in `<main>'

Steps to reproduce the problem

Use the latest rubocop version. previous versions did not fail at this code

RuboCop version

0.67.2 (using Parser 2.6.2.1, running on ruby 2.5.3 x64-mingw32)

Rails is 5.2.3

[koic]

This issue is the same as #6888 and #6943 and resolved at #6889. It will be included in the next release RuboCop 0.68.