Errors experienced when enabling texture packs

[src4026]

Minetest version

Minetest 5.8.0-dev-c247761 (Linux)
Using Irrlicht 1.9.0mt12
Using LuaJIT 2.1.0-beta3
BUILD_TYPE=Release
RUN_IN_PLACE=1
USE_CURL=1
USE_GETTEXT=1
USE_SOUND=1
STATIC_SHAREDIR="."
STATIC_LOCALEDIR="locale"

Active renderer

No response

Irrlicht device

No response

Operating system and version

Pop!_OS 22.04

CPU model

No response

GPU model

No response

OpenGL version

No response

Summary

I cloned the latest version of the minetest master branch right now and installed a few texturepacks. Upon going to the content tab and double clicking and/or clicking the User texturepack button, it pops up an error but in the end does select it and shows the following:

Runtime error from mod '' in callback handleMainMenuButtons(): /home/sasharc/minetest/bin/../builtin/common/filterlist.lua:209: attempt to index local 'self' (a nil value)
stack traceback:
	/home/sasharc/minetest/bin/../builtin/common/filterlist.lua:209: in function 'size'
	...sasharc/minetest/bin/../builtin/mainmenu/tab_content.lua:69: in function 'get_formspec'
	/home/sasharc/minetest/bin/../builtin/fstk/tabview.lua:67: in function 'get_formspec'
	/home/sasharc/minetest/bin/../builtin/fstk/ui.lua:101: in function 'update'
	/home/sasharc/minetest/bin/../builtin/fstk/ui.lua:145: in function 'handle_buttons'
	/home/sasharc/minetest/bin/../builtin/fstk/ui.lua:186: in function </home/sasharc/minetest/bin/../builtin/fstk/ui.lua:172>

Steps to reproduce

• Install a texture pack
• Double click to enable it
• Errors are shown (but in the end texturepack is selected)

[grorp]

Will be fixed by #13829.

[src4026]

Will be fixed by #13829.

Ah, great, there's already a PR for it. Thanks! 👍