[MC-276906] Specifying a block tag in an item's can_place_on or can_break component in a recipe or loot table causes validation error

Referencing a block tag in a recipe or a loot table in an item's can_place_on or can_break component causes the datapack not to load.

How to reproduce:

Download the attached datapack and try to load it in a world
Notice the datapack doesn't validate
(optional) Remove the block tag references from the loot table and recipe and reload; notice the datapack loads

Attachments

deobf_example_output.txt

example_output.txt

example_pack.zip

Comments 3

[Mojang] Triage Team 2024-09-24T07:11:18Z

Thank you for your report!
After consideration, the issue is being closed as Invalid.

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Misode 2024-09-24T18:48:10Z

This is a regression from 1.21.1 where these loot tables and recipes worked fine.

It should also be noted that using block tags in these components works fine when used in a /give command or inline loot tables.

Please reopen.

YZERO 2024-10-09T21:03:06Z

This is a highly important issue to fix, and most definitely can be considered a bug.
If implemented in 1.21.2, existing datapacks will break in ways that are nearly impossible to smoothly fix.

Why is this considered invalid?
Please reconsider if possible, thanks 🙂