From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Aikar Date: Thu, 2 Apr 2020 01:42:39 -0400 Subject: [PATCH] Prevent Double PlayerChunkMap adds crashing server Suspected case would be around the technique used in .stopRiding Stack will identify any causer of this and warn instead of crashing. diff --git a/src/main/java/net/minecraft/server/PlayerChunkMap.java b/src/main/java/net/minecraft/server/PlayerChunkMap.java index 4ba661c5a89bebe29c8802387bc93c10094b7606..6a2cf0c6f649e7a74b58fc292f57a08c0663b0a4 100644 --- a/src/main/java/net/minecraft/server/PlayerChunkMap.java +++ b/src/main/java/net/minecraft/server/PlayerChunkMap.java @@ -1411,6 +1411,14 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d { protected void addEntity(Entity entity) { org.spigotmc.AsyncCatcher.catchOp("entity track"); // Spigot + // Paper start - ignore and warn about illegal addEntity calls instead of crashing server + if (!entity.valid || entity.world != this.world || this.trackedEntities.containsKey(entity.getId())) { + new Throwable("[ERROR] Illegal PlayerChunkMap::addEntity for world " + this.world.getWorld().getName() + + ": " + entity + (this.trackedEntities.containsKey(entity.getId()) ? " ALREADY CONTAINED (This would have crashed your server)" : "")) + .printStackTrace(); + return; + } + // Paper end if (!(entity instanceof EntityComplexPart)) { if (!(entity instanceof EntityLightning)) { EntityTypes entitytypes = entity.getEntityType(); diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java index 255650fc6adcd81df2ee063209d2098745e45e39..c1e3c5ad7bbadedf01f7bd9162602398b81005a2 100644 --- a/src/main/java/net/minecraft/server/WorldServer.java +++ b/src/main/java/net/minecraft/server/WorldServer.java @@ -1463,7 +1463,7 @@ public class WorldServer extends World { } } - this.getChunkProvider().addEntity(entity); + // this.getChunkProvider().addEntity(entity); // Paper - moved down below valid=true // CraftBukkit start - SPIGOT-5278 if (entity instanceof EntityDrowned) { this.navigators.add(((EntityDrowned) entity).navigationWater); @@ -1474,6 +1474,7 @@ public class WorldServer extends World { this.navigators.add(((EntityInsentient) entity).getNavigation()); } entity.valid = true; // CraftBukkit + this.getChunkProvider().addEntity(entity); // Paper - from above to be below valid=true // Paper start - Set origin location when the entity is being added to the world if (entity.origin == null) { entity.origin = entity.getBukkitEntity().getLocation();