No idea, that's what I saw, when I came back.

[hboetes]

Nicotine+ Version: 3.2.0.dev1
GTK Version: 3.24.30
Python Version: 3.8.12 (default, Sep 26 2021, 13:12:50)
[Clang 11.1.0 ]

Type: <class 'IndexError'>
Value: list index out of range
Traceback: File "/home/nicotine/src/nicotine-plus/pynicotine/gtkgui/frame.py", line 1464, in on_change_primary_tab
page_num = self.MainNotebook.page_num(visible_pages[tab_num - 1])

[slook]

I have been able to reproduce this error @mathiascode it occurs when the number of visible primary tabs is less than 9 and a key-press event for Ctrl/Alt+ > visible_pages ... quite obvious really I'm surprised I missed this up until now, I think it's since 82fa35a

I suppose it must also happen when switching to a new secondary tab that is activated in a hidden primary tab.