Fix #1243

worldedit-core/src/main/java/com/fastasyncworldedit/core/queue/implementation/chunk/ChunkHolder.java

@@ -286,6 +286,7 @@ public class ChunkHolder<T extends Future<T>> implements IQueueChunk<T> {
             if (chunk.chunkSet.getSkyLight() != null) {
                 int layer = y >> 4;
                 layer -= chunk.chunkSet.getMinSectionIndex();
+                if (layer >= 0 && layer < chunk.chunkSet.getSectionCount()) {
                     if (chunk.chunkSet.getSkyLight()[layer] != null) {
                         int setLightValue = chunk.chunkSet.getSkyLight()[layer][(y & 15) << 8 | (z & 15) << 4 | (x & 15)];
                         if (setLightValue < 16) {
@@ -293,6 +294,7 @@ public class ChunkHolder<T extends Future<T>> implements IQueueChunk<T> {
                         }
                     }
                 }
+            }
             return chunk.chunkExisting.getSkyLight(x, y, z);
         }
 
@@ -301,6 +303,7 @@ public class ChunkHolder<T extends Future<T>> implements IQueueChunk<T> {
             if (chunk.chunkSet.getLight() != null) {
                 int layer = y >> 4;
                 layer -= chunk.chunkSet.getMinSectionIndex();
+                if (layer >= 0 && layer < chunk.chunkSet.getSectionCount()) {
                     if (chunk.chunkSet.getLight()[layer] != null) {
                         int setLightValue = chunk.chunkSet.getLight()[layer][(y & 15) << 8 | (z & 15) << 4 | (x & 15)];
                         if (setLightValue < 16) {
@@ -308,6 +311,7 @@ public class ChunkHolder<T extends Future<T>> implements IQueueChunk<T> {
                         }
                     }
                 }
+            }
             return chunk.chunkExisting.getEmittedLight(x, y, z);
         }
 
@@ -598,6 +602,7 @@ public class ChunkHolder<T extends Future<T>> implements IQueueChunk<T> {
             if (chunk.chunkSet.getSkyLight() != null) {
                 int layer = y >> 4;
                 layer -= chunk.chunkSet.getMinSectionIndex();
+                if (layer >= 0 && layer < chunk.chunkSet.getSectionCount()) {
                     if (chunk.chunkSet.getSkyLight()[layer] != null) {
                         int setLightValue = chunk.chunkSet.getSkyLight()[layer][(y & 15) << 8 | (z & 15) << 4 | (x & 15)];
                         if (setLightValue < 16) {
@@ -605,6 +610,7 @@ public class ChunkHolder<T extends Future<T>> implements IQueueChunk<T> {
                         }
                     }
                 }
+            }
             chunk.getOrCreateGet();
             chunk.delegate = BOTH;
             chunk.chunkExisting.trim(false);
@@ -616,6 +622,7 @@ public class ChunkHolder<T extends Future<T>> implements IQueueChunk<T> {
             if (chunk.chunkSet.getLight() != null) {
                 int layer = y >> 4;
                 layer -= chunk.chunkSet.getMinSectionIndex();
+                if (layer >= 0 && layer < chunk.chunkSet.getSectionCount()) {
                     if (chunk.chunkSet.getLight()[layer] != null) {
                         int setLightValue = chunk.chunkSet.getLight()[layer][(y & 15) << 8 | (z & 15) << 4 | (x & 15)];
                         if (setLightValue < 16) {
@@ -623,6 +630,7 @@ public class ChunkHolder<T extends Future<T>> implements IQueueChunk<T> {
                         }
                     }
                 }
+            }
             chunk.getOrCreateGet();
             chunk.delegate = BOTH;
             chunk.chunkExisting.trim(false);