[SRU] veusz fails to start under Python 3.10

[Dave Jones]

[ Impact ]

Veusz fails to start under jammy and kinetic.

[ Test Plan ]

* sudo apt install veusz
* veusz
* Observe that veusz fails to start, with the error indicated in the original description
* Enable proposed (https://wiki.ubuntu.com/Testing/EnableProposed)
* sudo apt install -t kinetic-proposed veusz
  - substitute jammy if testing there
* veusz
* Observe that veusz now starts (try running through the tutorial for a basic functionality test)

[ Regression Potential ]

Pretty low: there are no reverse dependencies for veusz, and the current state is that the application doesn't even start, so there's not much further it can regress.

[ Original Description ]

Attempting to start Veusz on my jammy installation fails. The following is produced as console output:

Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
Traceback (most recent call last):
  File "/usr/bin/veusz", line 33, in <module>
    sys.exit(load_entry_point('veusz==3.3.1', 'gui_scripts', 'veusz')())
  File "/usr/lib/python3/dist-packages/veusz/veusz_main.py", line 369, in run
    app.startup()
  File "/usr/lib/python3/dist-packages/veusz/veusz_main.py", line 267, in startup
    self.splash = makeSplash(self)
  File "/usr/lib/python3/dist-packages/veusz/veusz_main.py", line 69, in makeSplash
    font.setPointSize(font.pointSize()*1.5)
TypeError: setPointSize(self, int): argument 1 has unexpected type 'float'

It would appear that the relevant upstream bug (already fixed) is https://github.com/veusz/veusz/issues/563.

[Dave Jones (waveform)]

Attaching a debdiff which incorporates the patches for Python 3.10 compatibility from upstream. I've tested a build of this locally and veusz fires up and works happily with the patches in place. Test packages are currently building in the following PPA:

https://launchpad.net/~waveform/+archive/ubuntu/veusz/+packages

[Graham Inggs (ginggs)]

This needs to be fixed in kinetic first. I tried building veusz with your debdiff in kinetic, but it fails the same way as it does in Debian, see https://bugs.debian.org/1011706

If you can get veusz to build in kinetic, we can look at an SRU for jammy.
Unsubscribing sponsors for now.

[Jeremy Sanders (jeremysanders)]

A version which works on kinetic or jammy can be found here:
 https://salsa.debian.org/science-team/veusz
or built here for Ubuntu:
 https://launchpad.net/~jeremysanders/+archive/ubuntu/ppa/+packages

[Dave Jones (waveform)]

Hi Jeremy, thanks for the pointers! Looks like the debian science-team version is the one in lunar, and I've just tested that this works on the lunar desktop (which it does) so I'll convert this to an SRU for kinetic and jammy.

[Graham Inggs (ginggs)]

kinetic is EOL, so marking "won't fix" there

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Dave Jones (waveform)]

Looks like this was fixed with a sync from Debian.