Timeout::Error#exception

# File tmp/rubies/ruby-3.0.5/lib/timeout.rb, line 38
def exception(*)
  # TODO: use Fiber.current to see if self can be thrown
  if self.thread == Thread.current
    bt = caller
    begin
      throw(self, bt)
    rescue UncaughtThrowError
    end
  end
  self
end