Switched to ES6 language level

build.gradle

@@ -36,7 +36,7 @@ allprojects{
         if(!project.hasProperty("versionType")) versionType = 'official'
         appName = 'Mindustry'
         steamworksVersion = '891ed912791e01fe9ee6237a6497e5212b85c256'
-        rhinoVersion = '66ffaf9ba089cc4e6b83cd7a9a397488cd15bf87'
+        rhinoVersion = 'eeb327d141146663ff3924bd20d2a5da8a6439cc'
 
         loadVersionProps = {
             return new Properties().with{p -> p.load(file('../core/assets/version.properties').newReader()); return p }

core/src/mindustry/mod/Scripts.java

@@ -17,7 +17,6 @@ import java.net.*;
 import java.util.regex.*;
 
 public class Scripts implements Disposable{
-    private final static Object[] emptyObjects = {};
     private final Seq<String> blacklist = Seq.with("net", "files", "reflect", "javax", "rhino", "file", "channels", "jdk",
         "runtime", "util.os", "rmi", "security", "org.", "sun.", "beans", "sql", "http", "exec", "compiler", "process", "system",
         ".awt", "socket", "classloader", "oracle", "invoke", "arc.events", "java.util.function", "java.util.stream");
@@ -34,6 +33,7 @@ public class Scripts implements Disposable{
         context = Vars.platform.getScriptContext();
         context.setClassShutter(type -> !blacklist.contains(type.toLowerCase()::contains) || whitelist.contains(type.toLowerCase()::contains));
         context.getWrapFactory().setJavaPrimitiveWrap(false);
+        context.setLanguageVersion(Context.VERSION_ES6);
 
         scope = new ImporterTopLevel(context);