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

--- a/net/minecraft/world/level/block/MultifaceBlock.java
+++ b/net/minecraft/world/level/block/MultifaceBlock.java
@@ -133,7 +133,7 @@
 
         return (IBlockData) Arrays.stream(blockactioncontext.getNearestLookingDirections()).map((enumdirection) -> {
             return this.getStateForPlacement(iblockdata, world, blockposition, enumdirection);
-        }).filter(Objects::nonNull).findFirst().orElse((Object) null);
+        }).filter(Objects::nonNull).findFirst().orElse(null); // CraftBukkit - decompile error
     }
 
     @Nullable
@@ -225,7 +225,7 @@
         if (optional.isPresent()) {
             Pair<BlockPosition, EnumDirection> pair = (Pair) optional.get();
 
-            return this.spreadToFace(generatoraccess, (BlockPosition) pair.getFirst(), (EnumDirection) pair.getSecond(), flag);
+            return this.spreadToFace(generatoraccess, (BlockPosition) pair.getFirst(), (EnumDirection) pair.getSecond(), flag, blockposition); // CraftBukkit
         } else {
             return false;
         }
@@ -270,7 +270,7 @@
         }
     }
 
-    private boolean spreadToFace(GeneratorAccess generatoraccess, BlockPosition blockposition, EnumDirection enumdirection, boolean flag) {
+    private boolean spreadToFace(GeneratorAccess generatoraccess, BlockPosition blockposition, EnumDirection enumdirection, boolean flag, BlockPosition source) { // CraftBukkit
         IBlockData iblockdata = generatoraccess.getBlockState(blockposition);
         IBlockData iblockdata1 = this.getStateForPlacement(iblockdata, generatoraccess, blockposition, enumdirection);
 
@@ -279,7 +279,7 @@
                 generatoraccess.getChunk(blockposition).markPosForPostprocessing(blockposition);
             }
 
-            return generatoraccess.setBlock(blockposition, iblockdata1, 2);
+            return org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockSpreadEvent(generatoraccess, source, blockposition, iblockdata1, 2); // CraftBukkit
         } else {
             return false;
         }