The bug
The durability bar used by damageable items can appear completely empty even in cases where it has remaining uses.
I consider this to be an issue for much the same reason as MC-120664 was fixed: empty durability should imply the tool is no longer usable at all, rather than having a tiny pool of residual uses.
How to reproduce
Have an item, preferably one with high base durability, that is a small matter of uses (greater than one) from breaking.
Expected results
As the item can still be used, the durability bar should appear at its lowest level, but not empty (i.e. one red pixel). Empty durability bars should only be used if the durability is 0 or a negative number.
Actual results
The tool can still be used even when the durability bar looks empty, even though this logically doesn't make much sense.
Code analysis
Code analysis by @unknown can be found in this comment.
Linked issues
relates to 1
Attachments
Comments 4
Mojang needs to hire apollo
I think the durability bar should stay empty at 1 because it can be used as a last warning before your tool breaks
It is worth noting that bundles are not affected:
[media]
I believe I've identified the source of the issue in the code.
MCP-Reborn 1.20, net.minecraft.world.item:
{{public int getBarWidth(ItemStack p_150900_) {}}
{{ return Math.round(13.0F - (float)p_150900_.getDamageValue() * 13.0F / (float)this.maxDamage);}}
{{}}}
The bar width can be rounded down to 0, even if the item's damage value is lower than the maximum damage it can take. Using Math.ceil instead of Math.round should fix the issue.