Better logging for unknown save versions

core/src/mindustry/io/MapIO.java

@@ -39,6 +39,7 @@ public class MapIO{
             SaveIO.readHeader(stream);
             int version = stream.readInt();
             SaveVersion ver = SaveIO.getSaveWriter(version);
+            if(ver == null) throw new IOException("Unknown save version: " + version + ". Are you trying to load a save from a newer version?");
             StringMap tags = new StringMap();
             ver.region("meta", stream, counter, in -> tags.putAll(ver.readStringMap(in)));
             return new Map(file, tags.getInt("width"), tags.getInt("height"), tags, custom, version, Version.build);
@@ -69,6 +70,7 @@ public class MapIO{
             SaveIO.readHeader(stream);
             int version = stream.readInt();
             SaveVersion ver = SaveIO.getSaveWriter(version);
+            if(ver == null) throw new IOException("Unknown save version: " + version + ". Are you trying to load a save from a newer version?");
             ver.region("meta", stream, counter, ver::readStringMap);
 
             Pixmap floors = new Pixmap(map.width, map.height);

core/src/mindustry/io/SaveIO.java

@@ -32,7 +32,7 @@ public class SaveIO{
         return versionArray.peek();
     }
 
-    public static SaveVersion getSaveWriter(int version){
+    public static @Nullable SaveVersion getSaveWriter(int version){
         return versions.get(version);
     }
 

gradle.properties

@@ -26,4 +26,4 @@ org.gradle.caching=true
 org.gradle.internal.http.socketTimeout=100000
 org.gradle.internal.http.connectionTimeout=100000
 android.enableR8.fullMode=false
-archash=ae3b50eaca
+archash=e3a5a3a832