1 files changed, 65 insertions, 0 deletions
diff --git a/patches/server/0575-Fix-invulnerable-end-crystals.patch b/patches/server/0575-Fix-invulnerable-end-crystals.patch
new file mode 100644
index 0000000000..75347e76f0
--- /dev/null
+++ b/patches/server/0575-Fix-invulnerable-end-crystals.patch
@@ -0,0 +1,65 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Max Lee <[email protected]>
+Date: Thu, 27 May 2021 14:52:30 -0700
+Subject: [PATCH] Fix invulnerable end crystals
+
+MC-108513
+
+diff --git a/src/main/java/net/minecraft/world/entity/boss/enderdragon/EndCrystal.java b/src/main/java/net/minecraft/world/entity/boss/enderdragon/EndCrystal.java
+index e7e01effab5f727d9b84a0575d165127e3dfe4c9..036640d49a5e891e9a0f767abe33f1f51d6d4cde 100644
+--- a/src/main/java/net/minecraft/world/entity/boss/enderdragon/EndCrystal.java
++++ b/src/main/java/net/minecraft/world/entity/boss/enderdragon/EndCrystal.java
+@@ -30,6 +30,7 @@ public class EndCrystal extends Entity {
+     private static final EntityDataAccessor<Optional<BlockPos>> DATA_BEAM_TARGET = SynchedEntityData.defineId(EndCrystal.class, EntityDataSerializers.OPTIONAL_BLOCK_POS);
+     private static final EntityDataAccessor<Boolean> DATA_SHOW_BOTTOM = SynchedEntityData.defineId(EndCrystal.class, EntityDataSerializers.BOOLEAN);
+     public int time;
++    public boolean generatedByDragonFight = false; // Paper - Fix invulnerable end crystals
+ 
+     public EndCrystal(EntityType<? extends EndCrystal> type, Level world) {
+         super(type, world);
+@@ -66,6 +67,17 @@ public class EndCrystal extends Entity {
+                 }
+                 // CraftBukkit end
+             }
++            // Paper start - Fix invulnerable end crystals
++            if (this.level().paperConfig().unsupportedSettings.fixInvulnerableEndCrystalExploit && this.generatedByDragonFight && this.isInvulnerable()) {
++                if (!java.util.Objects.equals(((ServerLevel) this.level()).uuid, this.getOriginWorld())
++                    || ((ServerLevel) this.level()).getDragonFight() == null
++                    || ((ServerLevel) this.level()).getDragonFight().respawnStage == null
++                    || ((ServerLevel) this.level()).getDragonFight().respawnStage.ordinal() > net.minecraft.world.level.dimension.end.DragonRespawnAnimation.SUMMONING_DRAGON.ordinal()) {
++                    this.setInvulnerable(false);
++                    this.setBeamTarget(null);
++                }
++            }
++            // Paper end - Fix invulnerable end crystals
+         }
+ 
+     }
+@@ -77,6 +89,7 @@ public class EndCrystal extends Entity {
+         }
+ 
+         nbt.putBoolean("ShowBottom", this.showsBottom());
++        if (this.generatedByDragonFight) nbt.putBoolean("Paper.GeneratedByDragonFight", this.generatedByDragonFight); // Paper - Fix invulnerable end crystals
+     }
+ 
+     @Override
+@@ -88,6 +101,7 @@ public class EndCrystal extends Entity {
+         if (nbt.contains("ShowBottom", 1)) {
+             this.setShowBottom(nbt.getBoolean("ShowBottom"));
+         }
++        if (nbt.contains("Paper.GeneratedByDragonFight", 1)) this.generatedByDragonFight = nbt.getBoolean("Paper.GeneratedByDragonFight"); // Paper - Fix invulnerable end crystals
+ 
+     }
+ 
+diff --git a/src/main/java/net/minecraft/world/level/levelgen/feature/SpikeFeature.java b/src/main/java/net/minecraft/world/level/levelgen/feature/SpikeFeature.java
+index 4b685e185ebac8553f1f81d1a5a04be8166a6ca4..3b36caafde83c87c823277e2085ee82ae497b9be 100644
+--- a/src/main/java/net/minecraft/world/level/levelgen/feature/SpikeFeature.java
++++ b/src/main/java/net/minecraft/world/level/levelgen/feature/SpikeFeature.java
+@@ -101,6 +101,7 @@ public class SpikeFeature extends Feature<SpikeConfiguration> {
+             endCrystal.setBeamTarget(config.getCrystalBeamTarget());
+             endCrystal.setInvulnerable(config.isCrystalInvulnerable());
+             endCrystal.moveTo((double)spike.getCenterX() + 0.5D, (double)(spike.getHeight() + 1), (double)spike.getCenterZ() + 0.5D, random.nextFloat() * 360.0F, 0.0F);
++            endCrystal.generatedByDragonFight = true; // Paper - Fix invulnerable end crystals
+             world.addFreshEntity(endCrystal);
+             BlockPos blockPos2 = endCrystal.blockPosition();
+             this.setBlock(world, blockPos2.below(), Blocks.BEDROCK.defaultBlockState());