From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Spottedleaf Date: Sun, 20 Jun 2021 00:08:13 -0700 Subject: [PATCH] Do not allow ticket level changes when updating chunk ticking state This WILL cause state corruption if it happens. So, don't allow it. diff --git a/src/main/java/net/minecraft/server/level/ChunkHolder.java b/src/main/java/net/minecraft/server/level/ChunkHolder.java index 49247d12e743f987113524121e60a3e0ba4a825a..b473a0e3235405dde46d9d6cb300e88d6b1d121b 100644 --- a/src/main/java/net/minecraft/server/level/ChunkHolder.java +++ b/src/main/java/net/minecraft/server/level/ChunkHolder.java @@ -423,7 +423,13 @@ public class ChunkHolder { CompletableFuture completablefuture1 = new CompletableFuture(); completablefuture1.thenRunAsync(() -> { + // Paper start - do not allow ticket level changes + boolean unloadingBefore = this.chunkMap.unloadingPlayerChunk; + this.chunkMap.unloadingPlayerChunk = true; + try { + // Paper end - do not allow ticket level changes playerchunkmap.onFullChunkStatusChange(this.pos, playerchunk_state); + } finally { this.chunkMap.unloadingPlayerChunk = unloadingBefore; } // Paper - do not allow ticket level changes }, executor); this.pendingFullStateConfirmation = completablefuture1; completablefuture.thenAccept((either) -> { @@ -440,7 +446,12 @@ public class ChunkHolder { private void demoteFullChunk(ChunkMap playerchunkmap, ChunkHolder.FullChunkStatus playerchunk_state) { this.pendingFullStateConfirmation.cancel(false); + // Paper start - do not allow ticket level changes + boolean unloadingBefore = this.chunkMap.unloadingPlayerChunk; + this.chunkMap.unloadingPlayerChunk = true; + try { // Paper end - do not allow ticket level changes playerchunkmap.onFullChunkStatusChange(this.pos, playerchunk_state); + } finally { this.chunkMap.unloadingPlayerChunk = unloadingBefore; } // Paper - do not allow ticket level changes } protected long updateCount; // Paper - correctly handle recursion