class DEBUGGER__::WatchIVarBreakpoint

def watch_eval(tp)
  result = @object.instance_variable_get(@ivar)
  if result != @current
    begin
      @prev = @current
      @current = result
      if (@cond.nil? || @object.instance_eval(@cond)) && !skip_path?(tp.path)
        suspend
      end
    ensure
      remove_instance_variable(:@prev)
    end
  end
rescue Exception
  false
end