Placed features have the {@link net.minecraft.world.gen.GenerationStep.Feature COMMENT generation steps}, and they generate in that order. For example, if biome X registers COMMENT the placed feature A in the {@link COMMENT net.minecraft.world.gen.GenerationStep.Feature#UNDERGROUND_ORES} step and the COMMENT placed feature B and C in the {@link COMMENT net.minecraft.world.gen.GenerationStep.Feature#TOP_LAYER_MODIFICATION} step, COMMENT then B and C generate after A. If, then, biome Y registers B in the {@link COMMENT net.minecraft.world.gen.GenerationStep.Feature#LOCAL_MODIFICATIONS}, this will COMMENT cause a "feature order cycle", because B should generate after A COMMENT according to the biome X, but A should generate after B according to biome Y. This COMMENT is wrong and causes a crash. COMMENT COMMENT
In other words, "feature order cycle" occurs when placed features are
COMMENT registered in multiple generation steps, due to e.g. reusing vanilla features.
COMMENT To prevent this error, make sure to generate the feature in the same generation step
COMMENT as vanilla, and if that is not possible, create a new feature.
METHOD method_44208 (ILnet/minecraft/class_7510$class_6543;)Z
ARG 1 feature
METHOD method_44209 (Ljava/util/Comparator;Lnet/minecraft/class_7510$class_6543;)Ljava/util/Set;
ARG 1 feature
METHOD method_44210 collectIndexedFeatures (Ljava/util/List;Ljava/util/function/Function;Z)Ljava/util/List;
COMMENT {@return the indexed placed features collected after validating feature orders}
COMMENT
COMMENT @throws IllegalStateException when a feature order cycle is detected
COMMENT
COMMENT @apiNote Check the class documentation for what feature order cycle means.
ARG 0 biomes
ARG 1 biomesToPlacedFeaturesList
COMMENT a function that, given a biome, returns a list of placed features grouped
COMMENT by their generation steps
ARG 2 listInvolvedBiomesOnFailure
COMMENT whether to include involved biomes in the thrown exception
METHOD method_44211 (Lorg/apache/commons/lang3/mutable/MutableInt;Ljava/lang/Object;)I
ARG 1 feature
CLASS class_6543 IndexedFeature
CLASS class_6827 IndexedFeatures
METHOD