From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Mon, 20 Jun 2022 14:59:38 +0100
Subject: [PATCH] Fix missing null check in
 ChunkGenerator#findNearestMapStructure


diff --git a/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java b/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java
index cdfe2589ca598263d58a11a978e176ab3ecb87e6..264ca51c2f2a5ff69688372b71ad7355366bac1a 100644
--- a/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java
+++ b/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java
@@ -353,6 +353,7 @@ public abstract class ChunkGenerator {
                 if (structureplacement1 instanceof ConcentricRingsStructurePlacement) {
                     ConcentricRingsStructurePlacement concentricringsstructureplacement = (ConcentricRingsStructurePlacement) structureplacement1;
                     Pair<BlockPos, Holder<Structure>> pair1 = this.getNearestGeneratedStructure((Set) entry.getValue(), world, structuremanager, center, skipReferencedStructures, concentricringsstructureplacement);
+                    if (pair1 == null) continue; // Paper
                     BlockPos blockposition1 = (BlockPos) pair1.getFirst();
                     double d1 = center.distSqr(blockposition1);