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[g1pi <1910573@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

calibre crashes in ubuntu 20.04.01:

$ apt policy calibre
calibre:
  Installed: 4.99.4+dfsg+really4.12.0-1build1
  Candidate: 4.99.4+dfsg+really4.12.0-1build1
  Version table:
 *** 4.99.4+dfsg+really4.12.0-1build1 500
        500 http://archive.ubuntu.com/ubuntu focal/universe amd64 Packages
        100 /var/lib/dpkg/status

$ calibre
Traceback (most recent call last):
  File "/usr/bin/calibre", line 20, in <module>
    sys.exit(calibre())
  File "/usr/lib/calibre/calibre/gui_launch.py", line 73, in calibre
    main(args)
  File "/usr/lib/calibre/calibre/gui2/main.py", line 543, in main
    listener = create_listener()
  File "/usr/lib/calibre/calibre/gui2/main.py", line 514, in create_listener
    return Listener(address=gui_socket_address())
  File "/usr/lib/calibre/calibre/utils/ipc/server.py", line 110, in __init__
    self._listener._unlink.cancel()
AttributeError: 'NoneType' object has no attribute 'cancel'

the patch at
https://github.com/kovidgoyal/calibre/commit/7b6416ac6522fc40f24f6baf3ca552b17a8b91d6
solves the problem.

best regards,
g1

** Affects: calibre (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1910573

Title:
  calibre does not start in focal

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