RuntimeError for variable reference in begin-end-until

[jonas054]

RuboCop crashes when inspecting this program:

begin
  a = (a || 0) + 1
  puts a
end until a > 2

Here's the beginning of the stack trace:

/home/jonas/dev/rubocop/lib/rubocop/cop/variable_inspector.rb:201:in `process_node': Using undeclared local variable "a" at /tmp/begin_end_until.rb:4:11, (lvar :a) (RuntimeError)
    from /home/jonas/dev/rubocop/lib/rubocop/cop/variable_inspector.rb:182:in `block in inspect_variables_in_scope'

Perhaps you can take a look at this @yujinakayama?

[yujinakayama]

@jonas054 OK.