Tin block stairs sometimes are black in inventory/hotbar (also slabs and other materials)

[Wuzzy2]

Very weird, in ed83e30, some (normal) stairs, inner stairs and outer stairs turn sometimes completely black in the hotbar, or when you pick them up via left click in the inventory.
In the hotbar, the affected stairs are only black if you have not selected it. If you highlighted it, the stairs look normal again.
It looks like an ordinary stair inventory image, except that all color pixels are black.
The wieldhand is OK.

Oddly, this happens especially with tin block stairs. I haven't seen this for other stair types so far.

MT version: c0dd4ea
MTG version: ed83e30

[paramat]

I did recently change these 3 to nodeboxes, maybe i made a mistake?

[TumeniNodes]

Tin stairs were added after the fact paramat, remember? Maybe something small missed in the code when they got added?
It is odd, I have never noticed this

[paramat]

Tin block texture looks ok.
Can't reproduce yet.

[paramat]

I just got dark slabs and stairs in aspen wood:

Creative mode, fetching a slab and a stair from creative inventory.
The bug only happens if the stair and slab have the same parent node (same material).

During a game session certain hotbar slots cause darkness, some are ok.
Moving both around, the darkness can switch from one to the other, but only one can be dark at any one time.
The dark node is the one in the higher slot, therefore nodes are never dark in the first hotbar slot.
If A is dark, moving B to a non-hotbar slot fixes A. returning B tothe hotbar makes A dark again.
Placing the slab and stair each side of the highlighted hotbar slot fixes both.
Nodes are never dark in the highlighted slot.
Adding a third slab/stair node creates more complex behaviour.

MT ea1ae07
MTG ed83e30

[paramat]

Possibly engine related.

[Fixer-007]

Confirmed on engine d677f29 with sandstone outer stair (black on hotbar when not selected, only certain block in certain hudbar position is affected in my situation, block in world and inventory itself are fine). Placing other nodeboxes like doors, torches in that spot does not produce the bug.



Shaders off, OGL 2.1

This issue is not related to minetest/minetest#4876

[rubenwardy]

This smells like an engine bug

[Thomas--S]

I experienced a very similiar thing with items from other mods on my server, so I think rubenwardy is right: This seems to be an engine bug.

[Fixer-007]

More notes:

• Persists after complete game restart (at least on the same world restart).
• When shaders enabled - it is invisible in hotbar.
• When shaders enabled and mipmapping disabled - it is black in hotbar.

Bisecting results

This regression was introduced in minetest/minetest@ee6bb5a (minetest/minetest#6596) "Fix item and wield meshes" by @numberZero

[paramat]

Thanks.

[paramat]

minetest/minetest#6780 merged.