module Kernel

def method_missing(m, *a)
  if m.to_s == 'debugger'
    begin
      require 'ruby-debug'
      debugger
    rescue LoadError => e
      warn <<-EOM
'*'*50}
e debugger statement on the following line was ignored:
#{caller(0).detect {|l| l !~ /method_missing/}}
 use the debugger statement, you must install ruby-debug.
'*'*50}
M
    end
  else
    super
  end
end