PaperMC/paper-server/nms-patches/net/minecraft/world/level/block/BlockCactus.patch

--- a/net/minecraft/world/level/block/BlockCactus.java
+++ b/net/minecraft/world/level/block/BlockCactus.java
@@ -23,6 +23,8 @@
 import net.minecraft.world.phys.shapes.VoxelShape;
 import net.minecraft.world.phys.shapes.VoxelShapeCollision;
 
+import org.bukkit.craftbukkit.event.CraftEventFactory; // CraftBukkit
+
 public class BlockCactus extends Block {
 
     public static final BlockStateInteger AGE = BlockProperties.aj;
@@ -57,7 +59,7 @@
                 int j = (Integer) iblockdata.get(BlockCactus.AGE);
 
                 if (j == 15) {
-                    worldserver.setTypeUpdate(blockposition1, this.getBlockData());
+                    CraftEventFactory.handleBlockGrowEvent(worldserver, blockposition1, this.getBlockData()); // CraftBukkit
                     IBlockData iblockdata1 = (IBlockData) iblockdata.set(BlockCactus.AGE, 0);
 
                     worldserver.setTypeAndData(blockposition, iblockdata1, 4);
@@ -114,7 +116,9 @@
 
     @Override
     public void a(IBlockData iblockdata, World world, BlockPosition blockposition, Entity entity) {
+        CraftEventFactory.blockDamage = world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ()); // CraftBukkit
         entity.damageEntity(DamageSource.CACTUS, 1.0F);
+        CraftEventFactory.blockDamage = null; // CraftBukkit
     }
 
     @Override