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63 lines
3.7 KiB
Diff
63 lines
3.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <Spottedleaf@users.noreply.github.com>
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Date: Sat, 12 Mar 2022 06:31:13 -0800
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Subject: [PATCH] Fix swamp hut cat generation deadlock
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The worldgen thread will attempt to get structure references
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via the world's getChunkAt method, which is fine if the gen is
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not cancelled - but if the chunk was unloaded, the call will block
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indefinitely. Instead of using the world state, we use the already
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supplied ServerLevelAccessor which will always have the chunk available.
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diff --git a/src/main/java/net/minecraft/world/entity/animal/Cat.java b/src/main/java/net/minecraft/world/entity/animal/Cat.java
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index 534630b0161c8d869e49e7a59572193550be0671..a744cb70ac719eae376fb2ab2271e4f8ac7b12f2 100644
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--- a/src/main/java/net/minecraft/world/entity/animal/Cat.java
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+++ b/src/main/java/net/minecraft/world/entity/animal/Cat.java
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@@ -364,7 +364,7 @@ public class Cat extends TamableAnimal implements VariantHolder<CatVariant> {
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});
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ServerLevel worldserver = world.getLevel();
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- if (worldserver.structureManager().getStructureWithPieceAt(this.blockPosition(), StructureTags.CATS_SPAWN_AS_BLACK).isValid()) {
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+ if (worldserver.structureManager().getStructureWithPieceAt(this.blockPosition(), StructureTags.CATS_SPAWN_AS_BLACK, world).isValid()) { // Paper - fix deadlock
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this.setVariant((CatVariant) BuiltInRegistries.CAT_VARIANT.getOrThrow(CatVariant.ALL_BLACK));
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this.setPersistenceRequired();
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}
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diff --git a/src/main/java/net/minecraft/world/level/StructureManager.java b/src/main/java/net/minecraft/world/level/StructureManager.java
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index b33a015b834873f279bf33a64974ef440a37df79..09c85ed428b8eaf51f8b3c6e45cce925f05ab354 100644
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--- a/src/main/java/net/minecraft/world/level/StructureManager.java
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+++ b/src/main/java/net/minecraft/world/level/StructureManager.java
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@@ -44,7 +44,12 @@ public class StructureManager {
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}
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public List<StructureStart> startsForStructure(ChunkPos pos, Predicate<Structure> predicate) {
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- Map<Structure, LongSet> map = this.level.getChunk(pos.x, pos.z, ChunkStatus.STRUCTURE_REFERENCES).getAllReferences();
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+ // Paper start
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+ return this.startsForStructure(pos, predicate, null);
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+ }
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+ public List<StructureStart> startsForStructure(ChunkPos pos, Predicate<Structure> predicate, @Nullable ServerLevelAccessor levelAccessor) {
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+ Map<Structure, LongSet> map = (levelAccessor == null ? this.level : levelAccessor).getChunk(pos.x, pos.z, ChunkStatus.STRUCTURE_REFERENCES).getAllReferences();
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+ // Paper end
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ImmutableList.Builder<StructureStart> builder = ImmutableList.builder();
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for(Map.Entry<Structure, LongSet> entry : map.entrySet()) {
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@@ -108,13 +113,18 @@ public class StructureManager {
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}
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public StructureStart getStructureWithPieceAt(BlockPos pos, TagKey<Structure> structureTag) {
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+ // Paper start
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+ return this.getStructureWithPieceAt(pos, structureTag, null);
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+ }
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+ public StructureStart getStructureWithPieceAt(BlockPos pos, TagKey<Structure> structureTag, @Nullable ServerLevelAccessor levelAccessor) {
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+ // Paper end
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Registry<Structure> registry = this.registryAccess().registryOrThrow(Registries.STRUCTURE);
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for(StructureStart structureStart : this.startsForStructure(new ChunkPos(pos), (structure) -> {
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return registry.getHolder(registry.getId(structure)).map((reference) -> {
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return reference.is(structureTag);
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}).orElse(false);
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- })) {
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+ }, levelAccessor)) { // Paper
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if (this.structureHasPieceAt(pos, structureStart)) {
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return structureStart;
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}
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