I guess people need to be yelled at for bad schematics

core/src/mindustry/game/Schematics.java

@@ -511,6 +511,8 @@ public class Schematics implements Loadable{
         try(DataInputStream stream = new DataInputStream(new InflaterInputStream(input))){
             short width = stream.readShort(), height = stream.readShort();
 
+            if(width > 128 || height > 128) throw new IOException("Invalid schematic: Too large (max possible size is 128x128)");
+
             StringMap map = new StringMap();
             int tags = stream.readUnsignedByte();
             for(int i = 0; i < tags; i++){
@@ -534,6 +536,9 @@ public class Schematics implements Loadable{
             }
 
             int total = stream.readInt();
+
+            if(total > 128 * 128) throw new IOException("Invalid schematic: Too many blocks.");
+
             Seq<Stile> tiles = new Seq<>(total);
             for(int i = 0; i < total; i++){
                 Block block = blocks.get(stream.readByte());