PaperMC/paper-server/nms-patches/net/minecraft/world/entity/animal/EntitySnowman.patch

--- a/net/minecraft/world/entity/animal/EntitySnowman.java
+++ b/net/minecraft/world/entity/animal/EntitySnowman.java
@@ -41,6 +41,10 @@
 import net.minecraft.world.level.gameevent.GameEvent;
 import net.minecraft.world.phys.Vec3D;
 
+// CraftBukkit start
+import org.bukkit.craftbukkit.event.CraftEventFactory;
+// CraftBukkit end
+
 public class EntitySnowman extends EntityGolem implements IShearable, IRangedEntity {
 
     private static final DataWatcherObject<Byte> DATA_PUMPKIN_ID = DataWatcher.defineId(EntitySnowman.class, DataWatcherRegistry.BYTE);
@@ -103,7 +107,7 @@
             BiomeBase biomebase = (BiomeBase) this.level.getBiome(blockposition).value();
 
             if (biomebase.shouldSnowGolemBurn(blockposition)) {
-                this.hurt(DamageSource.ON_FIRE, 1.0F);
+                this.hurt(CraftEventFactory.MELTING, 1.0F); // CraftBukkit - DamageSource.BURN -> CraftEventFactory.MELTING
             }
 
             if (!this.level.getGameRules().getBoolean(GameRules.RULE_MOBGRIEFING)) {
@@ -119,7 +123,11 @@
                 BlockPosition blockposition1 = new BlockPosition(i, j, k);
 
                 if (this.level.getBlockState(blockposition1).isAir() && iblockdata.canSurvive(this.level, blockposition1)) {
-                    this.level.setBlockAndUpdate(blockposition1, iblockdata);
+                    // CraftBukkit start
+                    if (!org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockFormEvent(this.level, blockposition1, iblockdata, this)) {
+                        continue;
+                    }
+                    // CraftBukkit end
                     this.level.gameEvent(GameEvent.BLOCK_PLACE, blockposition1, GameEvent.a.of(this, iblockdata));
                 }
             }
@@ -151,6 +159,11 @@
         ItemStack itemstack = entityhuman.getItemInHand(enumhand);
 
         if (itemstack.is(Items.SHEARS) && this.readyForShearing()) {
+            // CraftBukkit start
+            if (!CraftEventFactory.handlePlayerShearEntityEvent(entityhuman, this, itemstack, enumhand)) {
+                return EnumInteractionResult.PASS;
+            }
+            // CraftBukkit end
             this.shear(SoundCategory.PLAYERS);
             this.gameEvent(GameEvent.SHEAR, entityhuman);
             if (!this.level.isClientSide) {
@@ -170,7 +183,9 @@
         this.level.playSound((EntityHuman) null, (Entity) this, SoundEffects.SNOW_GOLEM_SHEAR, soundcategory, 1.0F, 1.0F);
         if (!this.level.isClientSide()) {
             this.setPumpkin(false);
+            this.forceDrops = true; // CraftBukkit
             this.spawnAtLocation(new ItemStack(Items.CARVED_PUMPKIN), 1.7F);
+            this.forceDrops = false; // CraftBukkit
         }
 
     }