--- ../src-base/minecraft/net/minecraft/block/BlockRedstoneDiode.java
+++ ../src-work/minecraft/net/minecraft/block/BlockRedstoneDiode.java
@@ -13,6 +13,8 @@
 import net.minecraft.world.IBlockAccess;
 import net.minecraft.world.World;
 
+import org.bukkit.craftbukkit.event.CraftEventFactory; // CraftBukkit
+
 public abstract class BlockRedstoneDiode extends BlockDirectional
 {
     protected final boolean isRepeaterPowered;
@@ -44,16 +46,30 @@
     {
         int l = p_149674_1_.getBlockMetadata(p_149674_2_, p_149674_3_, p_149674_4_);
 
-        if (!this.func_149910_g(p_149674_1_, p_149674_2_, p_149674_3_, p_149674_4_, l))
+        if (!this.func_149910_g((IBlockAccess) p_149674_1_, p_149674_2_, p_149674_3_, p_149674_4_, l))   // CraftBukkit - Cast world to IBlockAccess to call the right method.
         {
             boolean flag = this.isGettingInput(p_149674_1_, p_149674_2_, p_149674_3_, p_149674_4_, l);
 
             if (this.isRepeaterPowered && !flag)
             {
+                // CraftBukkit start
+                if (CraftEventFactory.callRedstoneChange(p_149674_1_, p_149674_2_, p_149674_3_, p_149674_4_, 15, 0).getNewCurrent() != 0)
+                {
+                    return;
+                }
+
+                // CraftBukkit end
                 p_149674_1_.setBlock(p_149674_2_, p_149674_3_, p_149674_4_, this.getBlockUnpowered(), l, 2);
             }
             else if (!this.isRepeaterPowered)
             {
+                // CraftBukkit start
+                if (CraftEventFactory.callRedstoneChange(p_149674_1_, p_149674_2_, p_149674_3_, p_149674_4_, 0, 15).getNewCurrent() != 15)
+                {
+                    return;
+                }
+
+                // CraftBukkit end
                 p_149674_1_.setBlock(p_149674_2_, p_149674_3_, p_149674_4_, this.getBlockPowered(), l, 2);
 
                 if (!flag)
