Here's a small datapack to check if the player is holding a lodestone compass that's tracking a lodestone in the overworld. It unfortunately doesn't work since the predicate requires a pos component as well
Steps to reproduce:
Install the datapack
Place a lodestone in the overworld
Use a compass on it and hold it in your mainhand
Run /execute if predicate lodestone_dimension_match:holding_lodestone_compass
The nbt way of doing this was with "nbt": "{LodestoneDimension:\"minecraft:overworld\"}"
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Relates to MC-270707, I suppose.
The issue is that the predicate tests with component instead of predicates as mentioned in MC-270707. There is no predicate for a lodestone_tracker but that probably makes this a feature request.
Confirmed – leaving this open since this seems to break something that was possible before components were introduced (and I personally haven't found a way to replicate it in a different way, though it's possible I missed something).
I worked around it with a function that returns 1 or 0 based on the player data. I then used execute if function which was fine for my needs. That solution wouldn't work if you want to do this check in a json file
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