Paper/nms-patches/ChunkSection.patch

--- a/net/minecraft/server/ChunkSection.java
+++ b/net/minecraft/server/ChunkSection.java
@@ -19,6 +19,18 @@
 
     }
 
+    // CraftBukkit start
+    public ChunkSection(int y, boolean flag, char[] blockIds) {
+        this.yPos = y;
+        this.blockIds = blockIds;
+        this.emittedLight = new NibbleArray();
+        if (flag) {
+            this.skyLight = new NibbleArray();
+        }
+        recalcBlockCounts();
+    }
+    // CraftBukkit end
+
     public IBlockData getType(int i, int j, int k) {
         IBlockData iblockdata = (IBlockData) Block.d.a(this.blockIds[j << 8 | k << 4 | i]);