more work work work

2021-06-14 12:42:08 +02:00
parent b018b48e2c
commit 578ec8c6fe
30 changed files with 131 additions and 444 deletions
--- a/patches/server/Add-missing-strikeLighting-call-to-World-spigot-stri.patch
+++ b/patches/server/Add-missing-strikeLighting-call-to-World-spigot-stri.patch
@@ -0,0 +1,19 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Shane Freeder <theboyetronic@gmail.com>
+Date: Sun, 26 Jul 2020 12:11:39 +0100
+Subject: [PATCH] Add missing strikeLighting call to
+ World#spigot()#strikeLightningEffect
+
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+@@ -0,0 +0,0 @@ public class CraftWorld implements World {
+             lightning.moveTo( loc.getX(), loc.getY(), loc.getZ() );
+             lightning.visualOnly = true;
+             lightning.isSilent = isSilent;
+            world.strikeLightning( lightning );
+             return (LightningStrike) lightning.getBukkitEntity();
+         }
+     };
--- a/patches/server/Add-moon-phase-API.patch
+++ b/patches/server/Add-moon-phase-API.patch
@@ -0,0 +1,22 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: BillyGalbreath <Blake.Galbreath@GMail.com>
+Date: Sun, 23 Aug 2020 16:32:11 +0200
+Subject: [PATCH] Add moon phase API
+
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+@@ -0,0 +0,0 @@ public class CraftWorld implements World {
+     public int getPlayerCount() {
+         return world.players().size();
+     }
+
+    @Override
+    public io.papermc.paper.world.MoonPhase getMoonPhase() {
+        return io.papermc.paper.world.MoonPhase.getPhase(getFullTime() / 24000L);
+    }
+     // Paper end
+ 
+     private static final Random rand = new Random();
--- a/patches/server/Add-playPickupItemAnimation-to-LivingEntity.patch
+++ b/patches/server/Add-playPickupItemAnimation-to-LivingEntity.patch
@@ -0,0 +1,21 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: William Blake Galbreath <blake.galbreath@gmail.com>
+Date: Sun, 23 Aug 2020 19:36:22 +0200
+Subject: [PATCH] Add playPickupItemAnimation to LivingEntity
+
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+@@ -0,0 +0,0 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
+             ((Mob) getHandle()).getJumpControl().jump();
+         }
+     }
+
+    @Override
+    public void playPickupItemAnimation(org.bukkit.entity.Item item, int quantity) {
+        getHandle().take(((CraftItem) item).getHandle(), quantity);
+    }
+     // Paper end
+ }
--- a/patches/server/Add-setMaxPlayers-API.patch
+++ b/patches/server/Add-setMaxPlayers-API.patch
@@ -0,0 +1,37 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Mariell Hoversholm <proximyst@proximyst.com>
+Date: Sat, 22 Aug 2020 23:59:30 +0200
+Subject: [PATCH] Add #setMaxPlayers API
+
+
+diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
+@@ -0,0 +0,0 @@ public abstract class PlayerList {
+     public final PlayerDataStorage playerIo;
+     private boolean doWhiteList;
+     private final RegistryAccess.RegistryHolder registryHolder;
+-    protected final int maxPlayers;
+    protected int maxPlayers; public final void setMaxPlayers(int maxPlayers) { this.maxPlayers = maxPlayers; } // Paper - remove final and add setter
+     private int viewDistance;
+     private boolean allowCheatsForAllPlayers;
+     private static final boolean ALLOW_LOGOUTIVATOR = false;
+diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+@@ -0,0 +0,0 @@ public final class CraftServer implements Server {
+         return this.playerList.getMaxPlayers();
+     }
+ 
+    // Paper start
+    @Override
+    public void setMaxPlayers(int maxPlayers) {
+        this.playerList.setMaxPlayers(maxPlayers);
+    }
+    // Paper end
+
+     // NOTE: These are dependent on the corresponding call in MinecraftServer
+     // so if that changes this will need to as well
+     @Override
--- a/patches/server/Brand-support.patch
+++ b/patches/server/Brand-support.patch
@@ -0,0 +1,91 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: DigitalRegent <misterwener@gmail.com>
+Date: Sat, 11 Apr 2020 13:10:58 +0200
+Subject: [PATCH] Brand support
+
+
+diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+@@ -0,0 +0,0 @@ import com.google.common.collect.Lists;
+ import com.google.common.primitives.Floats;
+ import com.mojang.brigadier.ParseResults;
+ import com.mojang.brigadier.StringReader;
+import io.netty.buffer.Unpooled;
+ import io.netty.util.concurrent.Future;
+ import io.netty.util.concurrent.GenericFutureListener;
+ import it.unimi.dsi.fastutil.ints.Int2ObjectMap.Entry;
+@@ -0,0 +0,0 @@ import net.minecraft.nbt.ListTag;
+ import net.minecraft.nbt.StringTag;
+ import net.minecraft.nbt.Tag;
+ import net.minecraft.network.Connection;
+import net.minecraft.network.FriendlyByteBuf;
+ import net.minecraft.network.chat.ChatType;
+ import net.minecraft.network.chat.Component;
+ import net.minecraft.network.chat.MutableComponent;
+@@ -0,0 +0,0 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
+     private static final int MAX_SIGN_LINE_LENGTH = Integer.getInteger("Paper.maxSignLength", 80);
+     private static final long KEEPALIVE_LIMIT = Long.getLong("paper.playerconnection.keepalive", 30) * 1000; // Paper - provide property to set keepalive limit
+ 
+    private String clientBrandName = null; // Paper - Brand name
+
+     public ServerGamePacketListenerImpl(MinecraftServer server, Connection connection, ServerPlayer player) {
+         this.server = server;
+         this.connection = connection;
+@@ -0,0 +0,0 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
+     private static final ResourceLocation CUSTOM_REGISTER = new ResourceLocation("register");
+     private static final ResourceLocation CUSTOM_UNREGISTER = new ResourceLocation("unregister");
+ 
+    private static final ResourceLocation MINECRAFT_BRAND = new ResourceLocation("brand"); // Paper - Brand support
+
+     @Override
+     public void handleCustomPayload(ServerboundCustomPayloadPacket packet) {
+         PacketUtils.ensureRunningOnSameThread(packet, this, this.player.getLevel());
+@@ -0,0 +0,0 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
+             try {
+                 byte[] data = new byte[packet.data.readableBytes()];
+                 packet.data.readBytes(data);
+                // Paper start - Brand support
+                if (packet.identifier.equals(MINECRAFT_BRAND)) {
+                    try {
+                        this.clientBrandName = new FriendlyByteBuf(Unpooled.copiedBuffer(data)).readUtf(256);
+                    } catch (StringIndexOutOfBoundsException ex) {
+                        this.clientBrandName = "illegal";
+                    }
+                }
+                // Paper end
+                 this.cserver.getMessenger().dispatchIncomingMessage(this.player.getBukkitEntity(), packet.identifier.toString(), data);
+             } catch (Exception ex) {
+                 ServerGamePacketListenerImpl.LOGGER.error("Couldn\'t dispatch custom payload", ex);
+@@ -0,0 +0,0 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
+ 
+     }
+ 
+    // Paper start - brand support
+    public String getClientBrandName() {
+        return clientBrandName;
+    }
+    // Paper end
+
+     public final boolean isDisconnected() {
+         return (!this.player.joining && !this.connection.isConnected()) || this.processedDisconnect; // Paper
+     }
+diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+@@ -0,0 +0,0 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
+         // Paper end
+     };
+ 
+    // Paper start - brand support
+    @Override
+    public String getClientBrandName() {
+        return getHandle().connection != null ? getHandle().connection.getClientBrandName() : null;
+    }
+    // Paper end
+
+     public Player.Spigot spigot()
+     {
+         return this.spigot;
--- a/patches/server/Do-not-let-the-server-load-chunks-from-newer-version.patch
+++ b/patches/server/Do-not-let-the-server-load-chunks-from-newer-version.patch
@@ -0,0 +1,40 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Zach Brown <1254957+zachbr@users.noreply.github.com>
+Date: Tue, 23 Jul 2019 20:44:47 -0500
+Subject: [PATCH] Do not let the server load chunks from newer versions
+
+If the server attempts to load a chunk generated by a newer version of
+the game, immediately stop the server to prevent data corruption.
+
+You can override this functionality at your own peril.
+
+diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
+++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
+@@ -0,0 +0,0 @@ public class ChunkSerializer {
+         holder.tasks.forEach(Runnable::run);
+         return holder.protoChunk;
+     }
+
+    // Paper start
+    private static final int CURRENT_DATA_VERSION = SharedConstants.getCurrentVersion().getWorldVersion();
+    private static final boolean JUST_CORRUPT_IT = Boolean.getBoolean("Paper.ignoreWorldDataVersion");
+    // Paper end
+
+     public static InProgressChunkHolder loadChunk(ServerLevel world, StructureManager structureManager, PoiManager poiStorage, ChunkPos pos, CompoundTag nbt, boolean distinguish) {
+         java.util.ArrayDeque<Runnable> tasksToExecuteOnMain = new java.util.ArrayDeque<>();
+         // Paper end
+         ChunkGenerator chunkgenerator = world.getChunkSource().getGenerator();
+        // Paper start - Do NOT attempt to load chunks saved with newer versions
+        if (nbt.contains("DataVersion", 99)) {
+            int dataVersion = nbt.getInt("DataVersion");
+            if (!JUST_CORRUPT_IT && dataVersion > CURRENT_DATA_VERSION) {
+                new RuntimeException("Server attempted to load chunk saved with newer version of minecraft! " + dataVersion + " > " + CURRENT_DATA_VERSION).printStackTrace();
+                System.exit(1);
+            }
+        }
+        // Paper end
+         BiomeSource worldchunkmanager = chunkgenerator.getBiomeSource();
+         CompoundTag nbttagcompound1 = nbt.getCompound("Level"); // Paper - diff on change, see ChunkSerializer#getChunkCoordinate
+         ChunkPos chunkcoordintpair1 = new ChunkPos(nbttagcompound1.getInt("xPos"), nbttagcompound1.getInt("zPos")); // Paper - diff on change, see ChunkSerializer#getChunkCoordinate
--- a/patches/server/Don-t-mark-null-chunk-sections-for-block-updates.patch
+++ b/patches/server/Don-t-mark-null-chunk-sections-for-block-updates.patch
@@ -0,0 +1,18 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Mariell Hoversholm <proximyst@proximyst.com>
+Date: Fri, 14 Aug 2020 23:41:19 +0200
+Subject: [PATCH] Don't mark null chunk sections for block updates
+
+
+diff --git a/src/main/java/net/minecraft/server/level/ChunkHolder.java b/src/main/java/net/minecraft/server/level/ChunkHolder.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/server/level/ChunkHolder.java
+++ b/src/main/java/net/minecraft/server/level/ChunkHolder.java
+@@ -0,0 +0,0 @@ public class ChunkHolder {
+                         this.a(world, blockposition, iblockdata);
+                     } else {
+                         LevelChunkSection chunksection = chunk.getSections()[j];
+                        if (chunksection == null) chunksection = new LevelChunkSection(sectionposition.getY(), chunk, world, true); // Paper - make a new chunk section if none was found
+                         ClientboundSectionBlocksUpdatePacket packetplayoutmultiblockchange = new ClientboundSectionBlocksUpdatePacket(sectionposition, shortset, chunksection, this.resendLight);
+ 
+                         this.broadcast(packetplayoutmultiblockchange, false);
--- a/patches/server/Don-t-require-FACING-data.patch
+++ b/patches/server/Don-t-require-FACING-data.patch
@@ -0,0 +1,35 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Mariell Hoversholm <proximyst@proximyst.com>
+Date: Sun, 23 Aug 2020 19:01:04 +0200
+Subject: [PATCH] Don't require FACING data
+
+
+diff --git a/src/main/java/net/minecraft/core/dispenser/DefaultDispenseItemBehavior.java b/src/main/java/net/minecraft/core/dispenser/DefaultDispenseItemBehavior.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/core/dispenser/DefaultDispenseItemBehavior.java
+++ b/src/main/java/net/minecraft/core/dispenser/DefaultDispenseItemBehavior.java
+@@ -0,0 +0,0 @@ import org.bukkit.event.block.BlockDispenseEvent;
+ // CraftBukkit end
+ 
+ public class DefaultDispenseItemBehavior implements DispenseItemBehavior {
+    private Direction enumdirection; // Paper
+ 
+     public DefaultDispenseItemBehavior() {}
+ 
+     @Override
+     public final ItemStack dispense(BlockSource pointer, ItemStack stack) {
+        enumdirection = pointer.getBlockState().getValue(DispenserBlock.FACING); // Paper - cache facing direction
+         ItemStack itemstack1 = this.execute(pointer, stack);
+ 
+         this.playSound(pointer);
+-        this.playAnimation(pointer, (Direction) pointer.getBlockState().getValue(DispenserBlock.FACING));
+        this.playAnimation(pointer, enumdirection); // Paper - cache facing direction
+         return itemstack1;
+     }
+ 
+     protected ItemStack execute(BlockSource pointer, ItemStack stack) {
+-        Direction enumdirection = (Direction) pointer.getBlockState().getValue(DispenserBlock.FACING);
+        // Paper - cached enum direction
+         Position iposition = DispenserBlock.getDispensePosition(pointer);
+         ItemStack itemstack1 = stack.split(1);
+ 
--- a/patches/server/Fix-AdvancementDataPlayer-leak-due-from-quitting-ear.patch
+++ b/patches/server/Fix-AdvancementDataPlayer-leak-due-from-quitting-ear.patch
@@ -0,0 +1,82 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Spottedleaf <spottedleaf@spottedleaf.dev>
+Date: Mon, 13 Jul 2020 06:22:54 -0700
+Subject: [PATCH] Fix AdvancementDataPlayer leak due from quitting early in
+ login
+
+Move the criterion storage to the AdvancementDataPlayer object
+itself, so the criterion object stores no references - and thus
+needs no cleanup.
+
+diff --git a/src/main/java/net/minecraft/advancements/critereon/SimpleCriterionTrigger.java b/src/main/java/net/minecraft/advancements/critereon/SimpleCriterionTrigger.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/advancements/critereon/SimpleCriterionTrigger.java
+++ b/src/main/java/net/minecraft/advancements/critereon/SimpleCriterionTrigger.java
+@@ -0,0 +0,0 @@ import net.minecraft.server.level.ServerPlayer;
+ import net.minecraft.world.level.storage.loot.LootContext;
+ 
+ public abstract class SimpleCriterionTrigger<T extends AbstractCriterionTriggerInstance> implements CriterionTrigger<T> {
+-    private final Map<PlayerAdvancements, Set<CriterionTrigger.Listener<T>>> players = Maps.newIdentityHashMap();
+    //private final Map<PlayerAdvancements, Set<CriterionTrigger.Listener<T>>> players = Maps.newIdentityHashMap(); // Paper - moved into AdvancementDataPlayer to fix memory leak
+
+    public SimpleCriterionTrigger() {}
+ 
+     @Override
+     public final void addPlayerListener(PlayerAdvancements manager, CriterionTrigger.Listener<T> conditions) {
+-        this.players.computeIfAbsent(manager, (managerx) -> {
+        manager.criterionData.computeIfAbsent(this, (managerx) -> { // Paper - fix AdvancementDataPlayer leak
+             return Sets.newHashSet();
+         }).add(conditions);
+     }
+ 
+     @Override
+     public final void removePlayerListener(PlayerAdvancements manager, CriterionTrigger.Listener<T> conditions) {
+-        Set<CriterionTrigger.Listener<T>> set = this.players.get(manager);
+        Set<CriterionTrigger.Listener<T>> set = (Set) manager.criterionData.get(this); // Paper - fix AdvancementDataPlayer leak
+         if (set != null) {
+             set.remove(conditions);
+             if (set.isEmpty()) {
+-                this.players.remove(manager);
+                manager.criterionData.remove(this); // Paper - fix AdvancementDataPlayer leak
+             }
+         }
+ 
+@@ -0,0 +0,0 @@ public abstract class SimpleCriterionTrigger<T extends AbstractCriterionTriggerI
+ 
+     @Override
+     public final void removePlayerListeners(PlayerAdvancements tracker) {
+-        this.players.remove(tracker);
+        tracker.criterionData.remove(this); // Paper - fix AdvancementDataPlayer leak
+     }
+ 
+     protected abstract T createInstance(JsonObject obj, EntityPredicate.Composite playerPredicate, DeserializationContext predicateDeserializer);
+@@ -0,0 +0,0 @@ public abstract class SimpleCriterionTrigger<T extends AbstractCriterionTriggerI
+ 
+     protected void trigger(ServerPlayer player, Predicate<T> tester) {
+         PlayerAdvancements playerAdvancements = player.getAdvancements();
+-        Set<CriterionTrigger.Listener<T>> set = this.players.get(playerAdvancements);
+        Set<CriterionTrigger.Listener<T>> set = (Set) playerAdvancements.criterionData.get(this); // Paper - fix AdvancementDataPlayer leak
+         if (set != null && !set.isEmpty()) {
+             LootContext lootContext = EntityPredicate.createContext(player, player);
+             List<CriterionTrigger.Listener<T>> list = null;
+diff --git a/src/main/java/net/minecraft/server/PlayerAdvancements.java b/src/main/java/net/minecraft/server/PlayerAdvancements.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/server/PlayerAdvancements.java
+++ b/src/main/java/net/minecraft/server/PlayerAdvancements.java
+@@ -0,0 +0,0 @@ import net.minecraft.advancements.Criterion;
+ import net.minecraft.advancements.CriterionProgress;
+ import net.minecraft.advancements.CriterionTrigger;
+ import net.minecraft.advancements.CriterionTriggerInstance;
+import net.minecraft.advancements.critereon.SimpleCriterionTrigger;
+ import net.minecraft.network.chat.ChatType;
+ import net.minecraft.network.chat.TranslatableComponent;
+ import net.minecraft.network.protocol.game.ClientboundSelectAdvancementsTabPacket;
+@@ -0,0 +0,0 @@ public class PlayerAdvancements {
+     private Advancement lastSelectedTab;
+     private boolean isFirstPacket = true;
+ 
+    public final Map<SimpleCriterionTrigger, Set<CriterionTrigger.Listener>> criterionData = Maps.newIdentityHashMap(); // Paper - fix advancement data player leakage
+
+     public PlayerAdvancements(DataFixer dataFixer, PlayerList playerManager, ServerAdvancementManager advancementLoader, File advancementFile, ServerPlayer owner) {
+         this.dataFixer = dataFixer;
+         this.playerList = playerManager;
--- a/patches/server/Fix-MC-187716-Use-configured-height.patch
+++ b/patches/server/Fix-MC-187716-Use-configured-height.patch
@@ -0,0 +1,51 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: William Blake Galbreath <Blake.Galbreath@GMail.com>
+Date: Sat, 15 Aug 2020 08:04:49 -0500
+Subject: [PATCH] Fix MC-187716 Use configured height
+
+
+diff --git a/src/main/java/net/minecraft/world/level/levelgen/surfacebuilders/NetherCappedSurfaceBuilder.java b/src/main/java/net/minecraft/world/level/levelgen/surfacebuilders/NetherCappedSurfaceBuilder.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/world/level/levelgen/surfacebuilders/NetherCappedSurfaceBuilder.java
+++ b/src/main/java/net/minecraft/world/level/levelgen/surfacebuilders/NetherCappedSurfaceBuilder.java
+@@ -0,0 +0,0 @@
+ package net.minecraft.world.level.levelgen.surfacebuilders;
+<<<<<<< found
+ 
+ import com.google.common.collect.ImmutableList;
+ import com.google.common.collect.ImmutableMap;
+@@ -0,0 +0,0 @@ public abstract class NetherCappedSurfaceBuilder extends SurfaceBuilder<SurfaceB
+         BlockPos.MutableBlockPos mutableBlockPos = new BlockPos.MutableBlockPos();
+         BlockState blockState3 = chunk.getBlockState(mutableBlockPos.set(k, 128, m));
+ 
+-        for(int p = 127; p >= i; --p) {
+        for(int p = height; p >= i; --p) { // Paper - fix MC-187716 - use configured height
+             mutableBlockPos.set(k, p, m);
+             BlockState blockState4 = chunk.getBlockState(mutableBlockPos);
+             if (blockState3.is(defaultBlock.getBlock()) && (blockState4.isAir() || blockState4 == defaultFluid)) {
+diff --git a/src/main/java/net/minecraft/world/level/levelgen/surfacebuilders/NetherForestSurfaceBuilder.java b/src/main/java/net/minecraft/world/level/levelgen/surfacebuilders/NetherForestSurfaceBuilder.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/world/level/levelgen/surfacebuilders/NetherForestSurfaceBuilder.java
+++ b/src/main/java/net/minecraft/world/level/levelgen/surfacebuilders/NetherForestSurfaceBuilder.java
+@@ -0,0 +0,0 @@ public class NetherForestSurfaceBuilder extends SurfaceBuilder<SurfaceBuilderBas
+         int o = -1;
+         BlockState blockState = surfaceBuilderBaseConfiguration.getUnderMaterial();
+ 
+-        for(int p = 127; p >= i; --p) {
+        for(int p = height; p >= i; --p) { // Paper - fix MC-187716 - use configured height
+             mutableBlockPos.set(k, p, m);
+             BlockState blockState2 = surfaceBuilderBaseConfiguration.getTopMaterial();
+             BlockState blockState3 = chunk.getBlockState(mutableBlockPos);
+diff --git a/src/main/java/net/minecraft/world/level/levelgen/surfacebuilders/NetherSurfaceBuilder.java b/src/main/java/net/minecraft/world/level/levelgen/surfacebuilders/NetherSurfaceBuilder.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/world/level/levelgen/surfacebuilders/NetherSurfaceBuilder.java
+++ b/src/main/java/net/minecraft/world/level/levelgen/surfacebuilders/NetherSurfaceBuilder.java
+@@ -0,0 +0,0 @@ public class NetherSurfaceBuilder extends SurfaceBuilder<SurfaceBuilderBaseConfi
+         BlockState blockState = surfaceBuilderBaseConfiguration.getTopMaterial();
+         BlockState blockState2 = surfaceBuilderBaseConfiguration.getUnderMaterial();
+ 
+-        for(int p = 127; p >= i; --p) {
+        for(int p = height; p >= i; --p) { // Paper - fix MC-187716 - use configured height
+             mutableBlockPos.set(k, p, m);
+             BlockState blockState3 = chunk.getBlockState(mutableBlockPos);
+             if (blockState3.isAir()) {
--- a/patches/server/Fix-SPIGOT-5824-Bukkit-world-container-is-not-used.patch
+++ b/patches/server/Fix-SPIGOT-5824-Bukkit-world-container-is-not-used.patch
@@ -0,0 +1,33 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: William Blake Galbreath <Blake.Galbreath@GMail.com>
+Date: Fri, 10 Jul 2020 13:12:33 -0500
+Subject: [PATCH] Fix SPIGOT-5824 Bukkit world-container is not used
+
+
+diff --git a/src/main/java/net/minecraft/server/Main.java b/src/main/java/net/minecraft/server/Main.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/server/Main.java
+++ b/src/main/java/net/minecraft/server/Main.java
+@@ -0,0 +0,0 @@ public class Main {
+                 return;
+             }
+ 
+-            File file = (File) optionset.valueOf("universe"); // CraftBukkit
+            // Paper start - fix SPIGOT-5824
+            File file;
+            File userCacheFile = new File("usercache.json");
+            if (optionset.has("universe")) {
+                file = (File) optionset.valueOf("universe"); // CraftBukkit
+                userCacheFile = new File(file, "usercache.json");
+            } else {
+                file = new File(bukkitConfiguration.getString("settings.world-container", "."));
+            }
+            // Paper end - fix SPIGOT-5824
+             YggdrasilAuthenticationService yggdrasilauthenticationservice = new com.destroystokyo.paper.profile.PaperAuthenticationService(Proxy.NO_PROXY); // Paper
+             MinecraftSessionService minecraftsessionservice = yggdrasilauthenticationservice.createMinecraftSessionService();
+             GameProfileRepository gameprofilerepository = yggdrasilauthenticationservice.createProfileRepository();
+-            GameProfileCache usercache = new GameProfileCache(gameprofilerepository, new File(file, MinecraftServer.USERID_CACHE_FILE.getName()));
+            GameProfileCache usercache = new GameProfileCache(gameprofilerepository, userCacheFile); // Paper - only move usercache.json into folder if --universe is used, not world-container
+             // CraftBukkit start
+             String s = (String) Optional.ofNullable((String) optionset.valueOf("world")).orElse(dedicatedserversettings.getProperties().levelName);
+             LevelStorageSource convertable = LevelStorageSource.createDefault(file.toPath());
--- a/patches/server/Fix-SPIGOT-5885-Unable-to-disable-advancements.patch
+++ b/patches/server/Fix-SPIGOT-5885-Unable-to-disable-advancements.patch
@@ -0,0 +1,18 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: William Blake Galbreath <Blake.Galbreath@GMail.com>
+Date: Fri, 10 Jul 2020 12:38:12 -0500
+Subject: [PATCH] Fix SPIGOT-5885 Unable to disable advancements
+
+
+diff --git a/src/main/java/net/minecraft/server/Main.java b/src/main/java/net/minecraft/server/Main.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/server/Main.java
+++ b/src/main/java/net/minecraft/server/Main.java
+@@ -0,0 +0,0 @@ public class Main {
+                 return;
+             }
+ 
+            org.spigotmc.SpigotConfig.disabledAdvancements = spigotConfiguration.getStringList("advancements.disabled"); // Paper - fix SPIGOT-5885, must be set early in init
+             // Paper start - fix SPIGOT-5824
+             File file;
+             File userCacheFile = new File("usercache.json");
--- a/patches/server/Fix-SPIGOT-5989.patch
+++ b/patches/server/Fix-SPIGOT-5989.patch
@@ -0,0 +1,69 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Josh Roy <10731363+JRoy@users.noreply.github.com>
+Date: Wed, 15 Jul 2020 21:42:52 -0400
+Subject: [PATCH] Fix SPIGOT-5989
+
+Before this fix, if a player was respawning to a respawn anchor and
+the respawn location was modified away from the anchor with the
+PlayerRespawnEvent, the anchor would still lose some charge.
+This fixes that by checking if the modified spawn location is
+still at a respawn anchor.
+
+diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
+@@ -0,0 +0,0 @@ import net.minecraft.world.level.GameRules;
+ import net.minecraft.world.level.Level;
+ import net.minecraft.world.level.biome.BiomeManager;
+ import net.minecraft.world.level.block.Blocks;
+import net.minecraft.world.level.block.RespawnAnchorBlock;
+ import net.minecraft.world.level.block.state.BlockState;
+ import net.minecraft.world.level.border.BorderChangeListener;
+ import net.minecraft.world.level.border.WorldBorder;
+@@ -0,0 +0,0 @@ public abstract class PlayerList {
+         // Paper start
+         boolean isBedSpawn = false;
+         boolean isRespawn = false;
+        boolean isLocAltered = false; // Paper - Fix SPIGOT-5989
+         // Paper end
+ 
+         // CraftBukkit start - fire PlayerRespawnEvent
+@@ -0,0 +0,0 @@ public abstract class PlayerList {
+                 Optional optional;
+ 
+                 if (blockposition != null) {
+-                    optional = net.minecraft.world.entity.player.Player.findRespawnPositionAndUseSpawnBlock(worldserver1, blockposition, f, flag1, flag);
+                    optional = net.minecraft.world.entity.player.Player.findRespawnPositionAndUseSpawnBlock(worldserver1, blockposition, f, flag1, true); // Paper - Fix SPIGOT-5989
+                 } else {
+                     optional = Optional.empty();
+                 }
+@@ -0,0 +0,0 @@ public abstract class PlayerList {
+             }
+             // Spigot End
+ 
+-            location = respawnEvent.getRespawnLocation();
+            // Paper start - Fix SPIGOT-5989
+            if (!location.equals(respawnEvent.getRespawnLocation()) ) {
+                location = respawnEvent.getRespawnLocation();
+                isLocAltered = true;
+            }
+            // Paper end
+             if (!flag) entityplayer.reset(); // SPIGOT-4785
+             isRespawn = true; // Paper
+         } else {
+@@ -0,0 +0,0 @@ public abstract class PlayerList {
+         }
+         // entityplayer1.syncInventory();
+         entityplayer1.setHealth(entityplayer1.getHealth());
+-        if (flag2) {
+-            entityplayer1.connection.send(new ClientboundSoundPacket(SoundEvents.RESPAWN_ANCHOR_DEPLETE, SoundSource.BLOCKS, (double) blockposition.getX(), (double) blockposition.getY(), (double) blockposition.getZ(), 1.0F, 1.0F));
+        // Paper start - Fix SPIGOT-5989
+        if (flag2 && !isLocAltered) {
+            BlockState data = worldserver1.getBlockState(blockposition);
+            worldserver1.setBlock(blockposition, data.setValue(RespawnAnchorBlock.CHARGE, data.getValue(RespawnAnchorBlock.CHARGE) - 1), 3);
+            entityplayer1.connection.send(new ClientboundSoundPacket(SoundEvents.RESPAWN_ANCHOR_DEPLETE, SoundSource.BLOCKS, (double) location.getX(), (double) location.getY(), (double) location.getZ(), 1.0F, 1.0F));
+        // Paper end
+         }
+         // Added from changeDimension
+         this.sendAllPlayerInfo(entityplayer); // Update health, etc...
--- a/patches/server/Fix-SpawnChangeEvent-not-firing-for-all-use-cases.patch
+++ b/patches/server/Fix-SpawnChangeEvent-not-firing-for-all-use-cases.patch
@@ -0,0 +1,46 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: William Blake Galbreath <blake.galbreath@gmail.com>
+Date: Sat, 22 Aug 2020 23:36:21 +0200
+Subject: [PATCH] Fix SpawnChangeEvent not firing for all use-cases
+
+
+diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
+@@ -0,0 +0,0 @@ public class ServerLevel extends net.minecraft.world.level.Level implements Worl
+     }
+     // Paper end
+ 
+    public final void setSpawn(BlockPos blockposition, float f) { this.setDefaultSpawnPos(blockposition, f); } // Paper - OBFHELPER
+     public void setDefaultSpawnPos(BlockPos pos, float angle) {
+         // Paper - configurable spawn radius
+         BlockPos prevSpawn = this.getSharedSpawnPos();
+         //ChunkCoordIntPair chunkcoordintpair = new ChunkCoordIntPair(new BlockPosition(this.worldData.a(), 0, this.worldData.c()));
+ 
+         this.levelData.setSpawn(pos, angle);
+        new org.bukkit.event.world.SpawnChangeEvent(getWorld(), MCUtil.toLocation(this, prevSpawn)).callEvent(); // Paper
+         if (this.keepSpawnInMemory) {
+             // if this keepSpawnInMemory is false a plugin has already removed our tickets, do not re-add
+             this.removeTicketsForSpawn(this.paperConfig.keepLoadedRange, prevSpawn);
+diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+@@ -0,0 +0,0 @@ public class CraftWorld implements World {
+     public boolean setSpawnLocation(int x, int y, int z, float angle) {
+         try {
+             Location previousLocation = this.getSpawnLocation();
+-            world.levelData.setSpawn(new BlockPos(x, y, z), angle);
+            world.setSpawn(new BlockPos(x, y, z), angle); // Paper - use WorldServer#setSpawn
+ 
+            // Paper start - move to nms.World
+             // Notify anyone who's listening.
+-            SpawnChangeEvent event = new SpawnChangeEvent(this, previousLocation);
+-            this.server.getPluginManager().callEvent(event);
+            // SpawnChangeEvent event = new SpawnChangeEvent(this, previousLocation);
+            // server.getPluginManager().callEvent(event);
+            // Paper end
+ 
+             return true;
+         } catch (Exception e) {
--- a/patches/server/Fix-regex-mistake-in-CB-NBT-int-deserialization.patch
+++ b/patches/server/Fix-regex-mistake-in-CB-NBT-int-deserialization.patch
@@ -0,0 +1,27 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: mbax <matt@phozop.net>
+Date: Mon, 17 Aug 2020 12:17:37 -0400
+Subject: [PATCH] Fix regex mistake in CB NBT int deserialization
+
+The existing regex is too open and allows for the absence of any actual
+number data, detecting an NBT entry of just the letter "i" in upper or
+lower case. This causes a single-character NBT entry to be processed as
+an integer ending in "i", passing an empty String to to Integer.parseInt,
+triggering an exception in loading the item.
+
+This commit forces numbers to be present prior to the ending "i"
+letter.
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftNBTTagConfigSerializer.java b/src/main/java/org/bukkit/craftbukkit/util/CraftNBTTagConfigSerializer.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/org/bukkit/craftbukkit/util/CraftNBTTagConfigSerializer.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/CraftNBTTagConfigSerializer.java
+@@ -0,0 +0,0 @@ import net.minecraft.nbt.TagParser;
+ public class CraftNBTTagConfigSerializer {
+ 
+     private static final Pattern ARRAY = Pattern.compile("^\\[.*]");
+-    private static final Pattern INTEGER = Pattern.compile("[-+]?(?:0|[1-9][0-9]*)?i", Pattern.CASE_INSENSITIVE);
+    private static final Pattern INTEGER = Pattern.compile("[-+]?(?:0|[1-9][0-9]*)i", Pattern.CASE_INSENSITIVE); // Paper - fix regex
+     private static final Pattern DOUBLE = Pattern.compile("[-+]?(?:[0-9]+[.]?|[0-9]*[.][0-9]+)(?:e[-+]?[0-9]+)?d", Pattern.CASE_INSENSITIVE);
+     private static final TagParser MOJANGSON_PARSER = new TagParser(new StringReader(""));
+ 
--- a/patches/server/Fix-some-rails-connecting-improperly.patch
+++ b/patches/server/Fix-some-rails-connecting-improperly.patch
@@ -0,0 +1,94 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Spottedleaf <spottedleaf@spottedleaf.dev>
+Date: Fri, 24 Jul 2020 15:56:05 -0700
+Subject: [PATCH] Fix some rails connecting improperly
+
+
+diff --git a/src/main/java/net/minecraft/world/level/block/BaseRailBlock.java b/src/main/java/net/minecraft/world/level/block/BaseRailBlock.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/world/level/block/BaseRailBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/BaseRailBlock.java
+@@ -0,0 +0,0 @@ public abstract class BaseRailBlock extends Block implements SimpleWaterloggedBl
+         state = this.updateDir(world, pos, state, true);
+         if (this.isStraight) {
+             state.neighborChanged(world, pos, this, pos, notify);
+            state = world.getBlockState(pos); // Paper - don't desync, update again
+         }
+ 
+         return state;
+diff --git a/src/main/java/net/minecraft/world/level/block/DetectorRailBlock.java b/src/main/java/net/minecraft/world/level/block/DetectorRailBlock.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/world/level/block/DetectorRailBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/DetectorRailBlock.java
+@@ -0,0 +0,0 @@ public class DetectorRailBlock extends BaseRailBlock {
+ 
+     private void checkPressed(Level world, BlockPos pos, BlockState state) {
+         if (this.canSurvive(state, world, pos)) {
+            if (state.getBlock() != this) { return; } // Paper - not our block, don't do anything
+             boolean flag = (Boolean) state.getValue(DetectorRailBlock.POWERED);
+             boolean flag1 = false;
+             List<AbstractMinecart> list = this.getInteractingMinecartOfType(world, pos, AbstractMinecart.class, (entity) -> {
+diff --git a/src/main/java/net/minecraft/world/level/block/RailState.java b/src/main/java/net/minecraft/world/level/block/RailState.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/world/level/block/RailState.java
+++ b/src/main/java/net/minecraft/world/level/block/RailState.java
+@@ -0,0 +0,0 @@ import net.minecraft.world.level.block.state.BlockState;
+ import net.minecraft.world.level.block.state.properties.RailShape;
+ 
+ public class RailState {
+-    private final Level level;
+-    private final BlockPos pos;
+    private final Level level; public final Level getWorld() { return this.level; } // Paper - OBFHELPER
+    private final BlockPos pos; public final BlockPos getPos() { return this.pos; } // Paper - OBFHELPER
+     private final BaseRailBlock block;
+-    private BlockState state;
+    private BlockState state; public final BlockState getRailState() { return this.state; } // Paper - OBFHELPER
+     private final boolean isStraight;
+     private final List<BlockPos> connections = Lists.newArrayList();
+ 
+    // Paper start - prevent desync
+    public boolean isValid() {
+        return this.getWorld().getBlockState(this.getPos()).getBlock() == this.getRailState().getBlock();
+    }
+    // Paper end - prevent desync
+
+     public RailState(Level world, BlockPos pos, BlockState state) {
+         this.level = world;
+         this.pos = pos;
+@@ -0,0 +0,0 @@ public class RailState {
+     }
+ 
+     private void connectTo(RailState placementHelper) {
+        // Paper start - prevent desync
+        if (!this.isValid() || !placementHelper.isValid()) {
+            return;
+        }
+        // Paper end - prevent desync
+         this.connections.add(placementHelper.pos);
+         BlockPos blockPos = this.pos.north();
+         BlockPos blockPos2 = this.pos.south();
+@@ -0,0 +0,0 @@ public class RailState {
+         this.state = this.state.setValue(this.block.getShapeProperty(), railShape2);
+         if (forceUpdate || this.level.getBlockState(this.pos) != this.state) {
+             this.level.setBlock(this.pos, this.state, 3);
+            // Paper start - prevent desync
+            if (!this.isValid()) {
+                return this;
+            }
+            // Paper end - prevent desync
+ 
+             for(int i = 0; i < this.connections.size(); ++i) {
+                 RailState railState = this.getRail(this.connections.get(i));
+-                if (railState != null) {
+                if (railState != null && railState.isValid()) { // Paper - prevent desync
+                     railState.removeSoftConnections();
+                     if (railState.canConnectTo(this)) {
+                         railState.connectTo(this);
+@@ -0,0 +0,0 @@ public class RailState {
+     }
+ 
+     public BlockState getState() {
+-        return this.state;
+        return this.getWorld().getBlockState(this.getPos()); // Paper - prevent desync
+     }
+ }
--- a/patches/server/Incremental-player-saving.patch
+++ b/patches/server/Incremental-player-saving.patch
@@ -0,0 +1,104 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Sun, 9 Aug 2020 08:59:25 +0300
+Subject: [PATCH] Incremental player saving
+
+
+diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
+@@ -0,0 +0,0 @@ public class PaperConfig {
+         allowPistonDuplication = getBoolean("settings.unsupported-settings.allow-piston-duplication", config.getBoolean("settings.unsupported-settings.allow-tnt-duplication", false));
+         set("settings.unsupported-settings.allow-tnt-duplication", null);
+     }
+
+    public static int playerAutoSaveRate = -1;
+    public static int maxPlayerAutoSavePerTick = 10;
+    private static void playerAutoSaveRate() {
+        playerAutoSaveRate = getInt("settings.player-auto-save-rate", -1);
+        maxPlayerAutoSavePerTick = getInt("settings.max-player-auto-save-per-tick", -1);
+        if (maxPlayerAutoSavePerTick == -1) { // -1 Automatic / "Recommended"
+            // 10 should be safe for everyone unless you mass spamming player auto save
+            maxPlayerAutoSavePerTick = (playerAutoSaveRate == -1 || playerAutoSaveRate > 100) ? 10 : 20;
+        }
+    }
+ }
+diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
+@@ -0,0 +0,0 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
+ 
+         if (this.playerList != null) {
+             MinecraftServer.LOGGER.info("Saving players");
+-            this.playerList.saveAll();
+             this.playerList.removeAll(this.isRestarting); // Paper
+             try { Thread.sleep(100); } catch (InterruptedException ex) {} // CraftBukkit - SPIGOT-625 - give server at least a chance to send packets
+         }
+@@ -0,0 +0,0 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
+         // if (this.autosavePeriod > 0 && this.tickCount % this.autosavePeriod == 0) { // CraftBukkit // Paper - move down
+         //     MinecraftServer.LOGGER.debug("Autosave started"); // Paper
+         serverAutoSave = (autosavePeriod > 0 && this.tickCount % autosavePeriod == 0); // Paper
+        // Paper start
+        int playerSaveInterval = com.destroystokyo.paper.PaperConfig.playerAutoSaveRate;
+        if (playerSaveInterval < 0) {
+            playerSaveInterval = autosavePeriod;
+        }
+        // Paper end
+             this.profiler.push("save");
+-        if (this.autosavePeriod > 0 && this.tickCount % this.autosavePeriod == 0) { // Paper - moved from above
+-            this.playerList.saveAll();
+        if (playerSaveInterval > 0) { // Paper
+            this.playerList.savePlayers(playerSaveInterval); // Paper
+             // this.saveAllChunks(true, false, false); // Paper - saved incrementally below
+         } // Paper start
+         for (ServerLevel level : this.getAllLevels()) {
+diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
+@@ -0,0 +0,0 @@ public class ServerPlayer extends Player {
+     public final int getViewDistance() { return this.getLevel().getChunkSource().chunkMap.viewDistance - 1; } // Paper - placeholder
+ 
+     private static final Logger LOGGER = LogManager.getLogger();
+    public long lastSave = MinecraftServer.currentTick; // Paper
+     private static final int NEUTRAL_MOB_DEATH_NOTIFICATION_RADII_XZ = 32;
+     private static final int NEUTRAL_MOB_DEATH_NOTIFICATION_RADII_Y = 10;
+     public ServerGamePacketListenerImpl connection;
+diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
+@@ -0,0 +0,0 @@ public abstract class PlayerList {
+     protected void save(ServerPlayer player) {
+         if (!player.getBukkitEntity().isPersistent()) return; // CraftBukkit
+         if (!player.didPlayerJoinEvent) return; // Paper - If we never fired PJE, we disconnected during login. Data has not changed, and additionally, our saved vehicle is not loaded! If we save now, we will lose our vehicle (CraftBukkit bug)
+        player.lastSave = MinecraftServer.currentTick; // Paper
+         this.playerIo.save(player);
+         ServerStatsCounter serverstatisticmanager = (ServerStatsCounter) player.getStats(); // CraftBukkit
+ 
+@@ -0,0 +0,0 @@ public abstract class PlayerList {
+     }
+ 
+     public void saveAll() {
+-        net.minecraft.server.MCUtil.ensureMain("Save Players" , () -> { // Paper - Ensure main
+        // Paper start - incremental player saving
+        savePlayers(null);
+    }
+    public void savePlayers(Integer interval) {
+        MCUtil.ensureMain("Save Players" , () -> { // Paper - Ensure main
+         MinecraftTimings.savePlayers.startTiming(); // Paper
+        int numSaved = 0;
+        long now = MinecraftServer.currentTick;
+         for (int i = 0; i < this.players.size(); ++i) {
+-            this.save(this.players.get(i));
+            ServerPlayer entityplayer = this.players.get(i);
+            if (interval == null || now - entityplayer.lastSave >= interval) {
+                this.save(entityplayer);
+                if (interval != null && ++numSaved <= com.destroystokyo.paper.PaperConfig.maxPlayerAutoSavePerTick) { break; }
+            }
+            // Paper end
+         }
+         MinecraftTimings.savePlayers.stopTiming(); // Paper
+         return null; }); // Paper - ensure main
--- a/patches/server/Prevent-headless-pistons-from-being-created.patch
+++ b/patches/server/Prevent-headless-pistons-from-being-created.patch
@@ -0,0 +1,74 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: commandblockguy <commandblockguy1@gmail.com>
+Date: Fri, 14 Aug 2020 14:44:14 -0500
+Subject: [PATCH] Prevent headless pistons from being created
+
+Prevent headless pistons from being created by explosions or tree/mushroom growth.
+
+diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
+@@ -0,0 +0,0 @@ public class PaperConfig {
+         set("settings.unsupported-settings.allow-tnt-duplication", null);
+     }
+ 
+    public static boolean allowHeadlessPistons;
+    private static void allowHeadlessPistons() {
+        config.set("settings.unsupported-settings.allow-headless-pistons-readme", "This setting controls if players should be able to create headless pistons.");
+        allowHeadlessPistons = getBoolean("settings.unsupported-settings.allow-headless-pistons", false);
+    }
+
+     public static int playerAutoSaveRate = -1;
+     public static int maxPlayerAutoSavePerTick = 10;
+     private static void playerAutoSaveRate() {
+diff --git a/src/main/java/net/minecraft/world/level/Explosion.java b/src/main/java/net/minecraft/world/level/Explosion.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/world/level/Explosion.java
+++ b/src/main/java/net/minecraft/world/level/Explosion.java
+@@ -0,0 +0,0 @@ import java.util.Random;
+ import java.util.Set;
+ import javax.annotation.Nullable;
+ import net.minecraft.core.BlockPos;
+import net.minecraft.core.Direction;
+ import net.minecraft.core.Vec3i;
+ import net.minecraft.core.particles.ParticleTypes;
+ import net.minecraft.server.level.ServerLevel;
+@@ -0,0 +0,0 @@ import net.minecraft.world.level.block.BaseFireBlock;
+ import net.minecraft.world.level.block.Block;
+ import net.minecraft.world.level.block.Blocks;
+ import net.minecraft.world.level.block.entity.BlockEntity;
+import net.minecraft.world.level.block.piston.PistonHeadBlock;
+import net.minecraft.world.level.block.piston.PistonMovingBlockEntity;
+ import net.minecraft.world.level.block.state.BlockState;
+ import net.minecraft.world.level.gameevent.GameEvent;
+ import net.minecraft.world.level.material.FluidState;
+@@ -0,0 +0,0 @@ public class Explosion {
+ 
+                             if (f > 0.0F && this.damageCalculator.shouldBlockExplode(this, this.level, blockposition, iblockdata, f) && blockposition.getY() < 256 && blockposition.getY() >= 0) { // CraftBukkit - don't wrap explosions
+                                 set.add(blockposition);
+                                // Paper start - prevent headless pistons from forming
+                                if (!com.destroystokyo.paper.PaperConfig.allowHeadlessPistons && iblockdata.getBlock() == Blocks.MOVING_PISTON) {
+                                    BlockEntity extension = this.level.getBlockEntity(blockposition);
+                                    if (extension instanceof PistonMovingBlockEntity && ((PistonMovingBlockEntity) extension).isHead()) {
+                                       Direction direction = iblockdata.getValue(PistonHeadBlock.FACING);
+                                       set.add(blockposition.relative(direction.getOpposite()));
+                                    }
+                                }
+                                // Paper end
+                             }
+ 
+                             d4 += d0 * 0.30000001192092896D;
+diff --git a/src/main/java/net/minecraft/world/level/block/piston/PistonMovingBlockEntity.java b/src/main/java/net/minecraft/world/level/block/piston/PistonMovingBlockEntity.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/world/level/block/piston/PistonMovingBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/piston/PistonMovingBlockEntity.java
+@@ -0,0 +0,0 @@ public class PistonMovingBlockEntity extends BlockEntity {
+         return this.direction;
+     }
+ 
+    public final boolean isHead() { return this.isSourcePiston(); } // Paper - OBFHELPER
+
+     public boolean isSourcePiston() {
+         return this.isSourcePiston;
+     }