Ubuntu
calibre package

calibre crashes on startup with AttributeError: 'NoneType' object has no attribute 'cancel'

Bug #1894061 reported by Kevin Brubeck Unhammer on 2020-09-03

This bug report is a duplicate of: Bug #1898904: Calibre crashes at startup with AttributeError: 'NoneType' object has no attribute 'cancel'. Edit Remove

This bug affects 7 people

Affects		Status	Importance	Assigned to	Milestone
	calibre (Ubuntu)	Confirmed	Undecided	Unassigned

Bug Description

$ 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'

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: calibre 4.99.4+dfsg+really4.12.0-1build1
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.8
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: XFCE
Date: Thu Sep 3 10:02:21 2020
InstallationDate: Installed on 2018-04-27 (859 days ago)
InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
SourcePackage: calibre
UpgradeStatus: Upgraded to focal on 2020-08-27 (6 days ago)

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