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Bug
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Resolution: Fixed
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20w18a, 20w19a, 20w20a, 20w20b, 20w21a, 20w22a, 1.16 Pre-release 2
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None
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Plausible
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Advancements
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Low
The bug
As of 20w18a, all advancement triggers (with the intended exception of impossible) have access to a player predicate to check the player that activated the trigger. An example:
{
"criteria": {
"test": {
"trigger": "minecraft:location",
"conditions": {
"player": [
{
"condition": "minecraft:entity_properties",
"entity": "this",
"predicate": {
"flags": {
"is_sprinting": true
}
}
}
]
}
}
}
}
However, the predicate does not work in the minecraft:tick trigger.
{
"criteria": {
"test": {
"trigger": "minecraft:tick",
"conditions": {
"player": [
{
"condition": "minecraft:entity_properties",
"entity": "this",
"predicate": {
"flags": {
"is_sprinting": true
}
}
}
]
}
}
}
}
Code analysis
Using Mojang's mappings for 20w18a:
There are two trigger methods in net.minecraft.advancements.critereon.SimpleCriterionTrigger: one that takes in a predicate (which, to be clear, is a consolidation of the trigger's conditions, not player) and one that does not. The first method checks the player predicate but the second does not.
minecraft:tick uses the second method, preventing the use of player.