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[Bug 1899035] [NEW] startup problem on ubuntu 20.04

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From: Launchpad Bug Tracker <1899035@xxxxxxxxxxxxxxxxxx>
Date: Wed, 14 Oct 2020 18:08:03 -0000
Reply-to: Bug 1899035 <1899035@xxxxxxxxxxxxxxxxxx>
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from syslog:
Oct  8 16:24:07 mirian-pc systemd[1754]: Started Application launched by gnome-shell.
Oct  8 16:24:07 mirian-pc calibre-gui.desktop[299116]: Traceback (most recent call last):
Oct  8 16:24:07 mirian-pc calibre-gui.desktop[299116]:   File "/usr/bin/calibre", line 20, in <module>
Oct  8 16:24:07 mirian-pc calibre-gui.desktop[299116]:     sys.exit(calibre())
Oct  8 16:24:07 mirian-pc calibre-gui.desktop[299116]:   File "/usr/lib/calibre/calibre/gui_launch.py", line 73, in calibre
Oct  8 16:24:07 mirian-pc calibre-gui.desktop[299116]:     main(args)
Oct  8 16:24:07 mirian-pc calibre-gui.desktop[299116]:   File "/usr/lib/calibre/calibre/gui2/main.py", line 543, in main
Oct  8 16:24:07 mirian-pc calibre-gui.desktop[299116]:     listener = create_listener()
Oct  8 16:24:07 mirian-pc calibre-gui.desktop[299116]:   File "/usr/lib/calibre/calibre/gui2/main.py", line 514, in create_listener
Oct  8 16:24:07 mirian-pc calibre-gui.desktop[299116]:     return Listener(address=gui_socket_address())
Oct  8 16:24:07 mirian-pc calibre-gui.desktop[299116]:   File "/usr/lib/calibre/calibre/utils/ipc/server.py", line 110, in __init__
Oct  8 16:24:07 mirian-pc calibre-gui.desktop[299116]:     self._listener._unlink.cancel()
Oct  8 16:24:07 mirian-pc calibre-gui.desktop[299116]: AttributeError: 'NoneType' object has no attribute 'cancel'
Oct  8 16:24:07 mirian-pc systemd[1754]: gnome-launched-calibre-gui.desktop-299116.scope: Succeeded.


in terminal:
$ /usr/bin/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'


calibre version:
4.99.4+dfsg+really4.12.0-1build1 
ubuntu-focal-universe

ubuntu:
$ uname -a
Linux linux-pc 5.4.0-48-generic #52-Ubuntu SMP Thu Sep 10 10:58:49 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

$ python --version
Python 3.8.5

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


** Tags: not-our-bug ubuntu-bug
-- 
startup problem on ubuntu 20.04
https://bugs.launchpad.net/bugs/1899035
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