Labels on Discovered channels are missing

[xoriole]

Describe the bug
The labels on Discovered channels are not shown on Ubuntu

To Reproduce
Steps to reproduce the behavior:

1. Go to Channels / Discovered on the left sidebar.

Expected behavior
Labels like Name, Count, Popularity, Created at etc are visible.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: Ubuntu 22.04
• Tribler's version: release/7.13

[ichorid]

Same setup, installed Tribler 7.13-rc1 from .deb package, the labels are OK 🤷

[xoriole]

@ichorid you're right. The labels on 7.13-RC1 version are OK.

The issue is on current releases/7.13 branch. Running it from source or the build created from the branch, the issue is present. For example, you can check this build: https://jenkins-ci.tribler.org/job/Build-Tribler_release/job/Build-Ubuntu64/628/

[xoriole]

Also reproducible on the Windows version.

[ichorid]

I binary-searched the problem over the commits. It was introduced in: 47d94b4

[kozlovsky]

It looks like Qt expects pure str as a result of the QAbstractTableModel.headerData method. In other places it accepts str subclasses as well. #7402 fixes the issue.

[xoriole]

With the latest fix merged on the release branch. Both running from source and build versions have labels. Tested for English only though.

[ichorid]

Tested with Russian translation, fixed indeed 👍