Crash when the logger is set to debug mode

[haudren-woven]

First of all, thanks for the library!

I was playing with it and trying to work with properly deleting my queues / channels / connections when cancelling some tasks. I enabled the debug logger, and noticed that the event loop would stop, due to an exception. I traced it to those three locations, within queue.py:

• The queue is being printed here using %r formatting in a debug message
• repr is defined here, and basically prints the class name, the queue name and the consumer tag
• However the consumer tag gets deleted a few lines above

This means that at that point, the class has no more _consumer_tag member, and all attempts to print it will fail. I can see two ways to fix it, but I'd like your opinion:

• Modify repr to check for the presence / absence of consumer_tag using hasattr.
• Modify the way _consumer_tag is handled, and set it to None instead of deleting it. This means we need to change all checks.

[process0]

Can confirm.

[mosquito]

@haudren-woven thank you so much for such a detailed analysis of the problem. Keep up the good work.

[cdbennett]

Thanks for releasing the fix for this!