Closing the audiostream hangs the process

[alxx]

Hi,

Calling the .close method on the AudioStream causes my process to hang, unresponsive even to Ctrl-C. I have to kill it.

I'm using the Speaker example code, with the simple addition of this method in the Speaker module:

  def close
    @@stream.close
  end

Then I call Speaker.close at the end of the example (instead of muting it).

[alxx]

I now notice it doesn't happen all the time -- about one time in five. I'm running this on a Mid-2011 MacBook Air running High Sierra 10.13.6 with ruby 2.6.2 and portaudio 19.6.0 installed via homebrew.