experiment_set_trace_func.rb

# frozen_string_literal: true

# set_trace_func lambda { |event, file, line, id, binding, klass|
#   if binding.receiver.to_s == 'main'
#     puts "#{file}:#{line}: #{event} #{id} #{binding.receiver} [#{binding.local_variables.map(&:to_s).join(',')}]"
#   end
# }

# trace = TracePoint.new(:call, :c_call) do |tp|
#   puts "#{tp.lineno}: #{tp.binding.receiver}##{tp.method_id}"
#   # puts "#{tp.lineno}: #{tp.binding.receiver}##{tp.method_id} => #{tp.return_value}"
# end
# trace.enable

END {
  exception = $!
  return if exception.nil?

  require 'cgi'
  # https://www.google.com/search?sxsrf=ALeKk00oUZPEnFy5axuDNO3faXCCrDHmPw%3A1587309021240&source=hp&ei=3WmcXrrMC6vYhwP1taWACA&q=system+idle+error&oq=system+idle+error&gs_lcp=CgZwc3ktYWIQAzIGCAAQCBAeOgYIIxAnEBM6BAgjECc6BQgAEIMBOgcIABCDARAEOgQIABBDOgQIABAEOgcIABCDARBDOgIIADoHCCMQ6gIQJzoJCAAQBBBGEP8BOgUIABDLAToECAAQHjoGCAAQBRAeULAdWONOYOVWaARwAHgAgAGuAYgBqhOSAQQxLjE5mAEAoAEBqgEHZ3dzLXdperABCg&sclient=psy-ab&ved=0ahUKEwj6ru3y4vToAhUr7GEKHfVaCYAQ4dUDCAk&uact=5
  search_url = "https://www.google.com/search?q=#{CGI.escape(exception.message)}"

  system "open '#{search_url}'"
}

class Person
  attr_reader :name

  def initialize(name)
    @name = name
  end
end

class Student < Person
  attr_reader :grade

  def initialize(name, grade)
    super(name)

    @grade = grade
  end

  def shout!
    raise "OMG!"
  end
end

student = Student.new('Nobita Nobi', 4)

# student.shout!