PaperMC/patches/server/0791-Fix-swamp-hut-cat-generation-deadlock.patch
Bjarne Koll 2873869bb1
Drop manual isEditable copy in CraftSign
Signs no longer have a specific isEdiable state, the entire API in this
regard needs updating/deprecation. The boolean field is completely gone,
replaced by a uuid (which will need a new setEditingPlayer(UUID) method
on the Sign interface), and the current upstream implementation of
setEdiable simply flips the is_waxed state.

This patch is hence not needed as it neither allows editing (which will
be redone in a later patch) nor is required to copy the is_waxed boolean
flag as it lives in the signs compound tag and is covered by applyTo.
2023-06-08 11:35:39 +02:00

62 lines
3.7 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Sat, 12 Mar 2022 06:31:13 -0800
Subject: [PATCH] Fix swamp hut cat generation deadlock
The worldgen thread will attempt to get structure references
via the world's getChunkAt method, which is fine if the gen is
not cancelled - but if the chunk was unloaded, the call will block
indefinitely. Instead of using the world state, we use the already
supplied ServerLevelAccessor which will always have the chunk available.
diff --git a/src/main/java/net/minecraft/world/entity/animal/Cat.java b/src/main/java/net/minecraft/world/entity/animal/Cat.java
index 1bc8334691147a0f52ad0e97236c9e007b95ba34..770b15f5413eb38890587aa6af2a56f15bf5934f 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Cat.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Cat.java
@@ -363,7 +363,7 @@ public class Cat extends TamableAnimal implements VariantHolder<CatVariant> {
});
ServerLevel worldserver = world.getLevel();
- if (worldserver.structureManager().getStructureWithPieceAt(this.blockPosition(), StructureTags.CATS_SPAWN_AS_BLACK).isValid()) {
+ if (worldserver.structureManager().getStructureWithPieceAt(this.blockPosition(), StructureTags.CATS_SPAWN_AS_BLACK, world).isValid()) { // Paper - fix deadlock
this.setVariant((CatVariant) BuiltInRegistries.CAT_VARIANT.getOrThrow(CatVariant.ALL_BLACK));
this.setPersistenceRequired();
}
diff --git a/src/main/java/net/minecraft/world/level/StructureManager.java b/src/main/java/net/minecraft/world/level/StructureManager.java
index b33a015b834873f279bf33a64974ef440a37df79..09c85ed428b8eaf51f8b3c6e45cce925f05ab354 100644
--- a/src/main/java/net/minecraft/world/level/StructureManager.java
+++ b/src/main/java/net/minecraft/world/level/StructureManager.java
@@ -44,7 +44,12 @@ public class StructureManager {
}
public List<StructureStart> startsForStructure(ChunkPos pos, Predicate<Structure> predicate) {
- Map<Structure, LongSet> map = this.level.getChunk(pos.x, pos.z, ChunkStatus.STRUCTURE_REFERENCES).getAllReferences();
+ // Paper start
+ return this.startsForStructure(pos, predicate, null);
+ }
+ public List<StructureStart> startsForStructure(ChunkPos pos, Predicate<Structure> predicate, @Nullable ServerLevelAccessor levelAccessor) {
+ Map<Structure, LongSet> map = (levelAccessor == null ? this.level : levelAccessor).getChunk(pos.x, pos.z, ChunkStatus.STRUCTURE_REFERENCES).getAllReferences();
+ // Paper end
ImmutableList.Builder<StructureStart> builder = ImmutableList.builder();
for(Map.Entry<Structure, LongSet> entry : map.entrySet()) {
@@ -108,13 +113,18 @@ public class StructureManager {
}
public StructureStart getStructureWithPieceAt(BlockPos pos, TagKey<Structure> structureTag) {
+ // Paper start
+ return this.getStructureWithPieceAt(pos, structureTag, null);
+ }
+ public StructureStart getStructureWithPieceAt(BlockPos pos, TagKey<Structure> structureTag, @Nullable ServerLevelAccessor levelAccessor) {
+ // Paper end
Registry<Structure> registry = this.registryAccess().registryOrThrow(Registries.STRUCTURE);
for(StructureStart structureStart : this.startsForStructure(new ChunkPos(pos), (structure) -> {
return registry.getHolder(registry.getId(structure)).map((reference) -> {
return reference.is(structureTag);
}).orElse(false);
- })) {
+ }, levelAccessor)) { // Paper
if (this.structureHasPieceAt(pos, structureStart)) {
return structureStart;
}