class DEBUGGER__::LineBreakpoint

def activate iseq, event, line
  @iseq = iseq
  @type = event
  @line = line
  @path = iseq.absolute_path
  @key = [@path, @line].freeze
  SESSION.rehash_bps
  setup
  enable
  if @pending && !@oneshot
    DEBUGGER__.info "#{self} is activated."
  end
  @pending = false
end