module Byebug::FrameFunctions

def adjust_frame(frame_pos, absolute)
  if absolute
    abs_frame_pos = switch_to_frame(frame_pos)
    return errmsg("Can't navigate to c-frame") if c_frame?(abs_frame_pos)
  else
    abs_frame_pos = navigate_to_frame(frame_pos)
  end
  if abs_frame_pos >= Context.stack_size
    return errmsg("Can't navigate beyond the oldest frame")
  elsif abs_frame_pos < 0
    return errmsg("Can't navigate beyond the newest frame")
  end
  @state.frame_pos = abs_frame_pos
  @state.file = @state.context.frame_file @state.frame_pos
  @state.line = @state.context.frame_line @state.frame_pos
  @state.previous_line = nil
  ListCommand.new(@state).execute
end