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Paper/patches/server/0381-Don-t-fire-BlockFade-on-worldgen-threads.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 23 Apr 2020 01:36:39 -0400
Subject: [PATCH] Don't fire BlockFade on worldgen threads
Caused a deadlock
diff --git a/src/main/java/net/minecraft/world/level/block/FireBlock.java b/src/main/java/net/minecraft/world/level/block/FireBlock.java
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index 945d8b0f58f6a5b2281f136d3afbba3b34e0e6b5..8c6edd032c927f7d1e04e944b4ce5598d71cdd81 100644
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--- a/src/main/java/net/minecraft/world/level/block/FireBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/FireBlock.java
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@@ -101,6 +101,7 @@ public class FireBlock extends BaseFireBlock {
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@Override
public BlockState updateShape(BlockState state, Direction direction, BlockState neighborState, LevelAccessor world, BlockPos pos, BlockPos neighborPos) {
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// CraftBukkit start
+ if (!(world instanceof ServerLevel)) return this.canSurvive(state, world, pos) ? (BlockState) this.getStateWithAge(world, pos, (Integer) state.getValue(FireBlock.AGE)) : Blocks.AIR.defaultBlockState(); // Paper - don't fire events in world generation
if (!this.canSurvive(state, world, pos)) {
// Suppress during worldgen
if (!(world instanceof Level)) {
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@@ -116,7 +117,7 @@ public class FireBlock extends BaseFireBlock {
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return blockState.getHandle();
}
}
- return this.getStateWithAge(world, pos, (Integer) state.getValue(FireBlock.AGE));
+ return this.getStateWithAge(world, pos, (Integer) state.getValue(FireBlock.AGE)); // Paper - diff on change, see "don't fire events in world generation"
// CraftBukkit end
}