feature: improve handling of null issues in plot analysis

- Addresses #3865 (does not fix the underlying issue though)

Core/src/main/java/com/plotsquared/core/generator/HybridUtils.java

@@ -234,8 +234,19 @@ public class HybridUtils {
                         Set<BlockType> types = new HashSet<>();
                         for (int yIndex = 0; yIndex < height; yIndex++) {
                             BlockState old = oldBlocks[yIndex][x][z]; // Nullable
-                            try {
                             BlockState now = newBlocks[yIndex][x][z]; // Not null
+                            if (now == null) {
+                                throw new NullPointerException(String.format(
+                                        "\"now\" block null attempting to perform plot analysis. Indexes: x=%d of %d, yIndex=%d" +
+                                                " of %d, z=%d of %d",
+                                        x,
+                                        width,
+                                        yIndex,
+                                        height,
+                                        z,
+                                        length
+                                ));
+                            }
                             if (!now.equals(old) && !(old == null && now.getBlockType().equals(BlockTypes.AIR))) {
                                 changes[i]++;
                             }
@@ -270,9 +281,6 @@ public class HybridUtils {
                                 }
                                 types.add(now.getBlockType());
                             }
-                            } catch (NullPointerException e) {
-                                e.printStackTrace();
-                            }
                         }
                         variety[i] = types.size();
                         i++;