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cups-browsed does not clean queues which were created by it. It deletes only the first queue and ends after that.

How to reproduce:

1) set 'BrowsePoll' to a server, where there are 2+ queues
2) systemctl start cups-browsed
3) let it run for a while
4) systemctl stop cups-browsed
5) lpstat -a

Created attachment 1672692 [details]
Proposed patch

Patch from upstream. The testing will be covered by updated search_brq_printers test.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (cups-filters bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:3923