Attached is a debdiff with the minimal fix for this issue. I've uploaded an updated package for processing by the SRU team also.
** Patch added: "calibre_4.99.4+dfsg+really4.12.0-1ubuntu1.debdiff" https://bugs.launchpad.net/ubuntu/+source/calibre/+bug/1898904/+attachment/5446311/+files/calibre_4.99.4+dfsg+really4.12.0-1ubuntu1.debdiff ** Changed in: calibre (Ubuntu Focal) Status: Confirmed => In Progress ** Description changed: - On Ubuntu 20.04 few months ago I installed Calibre from Ubuntu Store - official repository. + [Impact] + Calibre crashes on startup with Ubuntu 20.04. + + [Test Case] + - install new package + - see if Calibre launches or crashes immediately on startup + + [Where problems could occur] + This update contains an upstream commit which corrects the specific error which is happening on Ubuntu 20.04. It simply skips calling cancel() when it is not available. The only regression I can think of is if this patch is incomplete, but it seems to work fine. + + + Original report: + On Ubuntu 20.04 few months ago I installed Calibre from Ubuntu Store official repository. I have been using Calibre for months, but today opening it from Ubuntu Launcher and nothing happens, no error. Executing: calibre from terminal and the output is: ============ 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() + 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' ============ Command: calibre --version outputs: calibre (calibre 4.99.4) I tried: sudo apt purge calibre sudo apt autoremove sudo apt install calibre but the problem is the same. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: calibre 4.99.4+dfsg+really4.12.0-1build1 ProcVersionSignature: Ubuntu 5.4.0-48.52-generic 5.4.60 Uname: Linux 5.4.0-48-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.9 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Wed Oct 7 18:07:57 2020 InstallationDate: Installed on 2019-10-23 (350 days ago) InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805) PackageArchitecture: all SourcePackage: calibre UpgradeStatus: Upgraded to focal on 2020-08-14 (54 days ago) modified.conffile..etc.default.apport: [modified] mtime.conffile..etc.default.apport: 2020-04-29T17:08:03.553351 -- You received this bug notification because you are a member of Edubuntu Bugsquad, which is subscribed to calibre in Ubuntu. https://bugs.launchpad.net/bugs/1898904 Title: Calibre crashes at startup with AttributeError: 'NoneType' object has no attribute 'cancel' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/calibre/+bug/1898904/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~edubuntu-bugs Post to : edubuntu-bugs@lists.launchpad.net Unsubscribe : https://launchpad.net/~edubuntu-bugs More help : https://help.launchpad.net/ListHelp
