diff --git a/build.gradle b/build.gradle
index 88bad52..18a1e3e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -35,7 +35,7 @@ java {
 }
 
 configure([tasks.compileJava]) {
-    options.release = 11
+    options.release = 8
 }
 
 jar {
diff --git a/src/main/java/me/topchetoeu/jscript/runtime/Engine.java b/src/main/java/me/topchetoeu/jscript/runtime/Engine.java
index f9e80f9..244b4b9 100644
--- a/src/main/java/me/topchetoeu/jscript/runtime/Engine.java
+++ b/src/main/java/me/topchetoeu/jscript/runtime/Engine.java
@@ -1,12 +1,11 @@
 package me.topchetoeu.jscript.runtime;
 
+import java.util.concurrent.CancellationException;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.Future;
 import java.util.concurrent.PriorityBlockingQueue;
 import java.util.function.Supplier;
 
-import me.topchetoeu.jscript.runtime.exceptions.InterruptException;
-
 public final class Engine implements EventLoop {
     private static class Task<T> implements Comparable<Task<?>> {
         public final Supplier<?> runnable;
@@ -41,10 +40,10 @@ public final class Engine implements EventLoop {
                 try {
                     ((Task<Object>)task).notifier.complete(task.runnable.get());
                 }
-                catch (InterruptException e) { throw e; }
+                catch (CancellationException e) { throw e; }
                 catch (RuntimeException e) { task.notifier.completeExceptionally(e); }
             }
-            catch (InterruptedException | InterruptException e) {
+            catch (InterruptedException | CancellationException e) {
                 for (var msg : tasks) msg.notifier.cancel(false);
                 break;
             }
diff --git a/src/main/java/me/topchetoeu/jscript/runtime/Frame.java b/src/main/java/me/topchetoeu/jscript/runtime/Frame.java
index 2725a7d..c6fb662 100644
--- a/src/main/java/me/topchetoeu/jscript/runtime/Frame.java
+++ b/src/main/java/me/topchetoeu/jscript/runtime/Frame.java
@@ -2,13 +2,13 @@ package me.topchetoeu.jscript.runtime;
 
 import java.util.Arrays;
 import java.util.Stack;
+import java.util.concurrent.CancellationException;
 
 import me.topchetoeu.jscript.common.Instruction;
 import me.topchetoeu.jscript.common.environment.Environment;
 import me.topchetoeu.jscript.common.environment.Key;
 import me.topchetoeu.jscript.runtime.debug.DebugContext;
 import me.topchetoeu.jscript.runtime.exceptions.EngineException;
-import me.topchetoeu.jscript.runtime.exceptions.InterruptException;
 import me.topchetoeu.jscript.runtime.values.Value;
 import me.topchetoeu.jscript.runtime.values.functions.CodeFunction;
 import me.topchetoeu.jscript.runtime.values.objects.ArrayLikeValue;
@@ -176,7 +176,7 @@ public final class Frame {
 
         if (returnValue == null && error == null) {
             try {
-                if (Thread.interrupted()) throw new InterruptException();
+                if (Thread.interrupted()) throw new CancellationException();
 
                 if (instr == null) {
                     if (stackPtr > 0) returnValue = stack[stackPtr - 1];
@@ -383,9 +383,9 @@ public final class Frame {
     public ObjectValue getValStackScope() {
         return new ArrayLikeValue() {
             @Override public Value get(int i) { return stack[i]; }
-            @Override public void set(int i, Value val) { stack[i] = val; }
+            @Override public boolean set(Environment env, int i, Value val) { return false; }
             @Override public boolean has(int i) { return i >= 0 && i < size(); }
-            @Override public void remove(int i) { }
+            @Override public boolean remove(int i) { return false; }
 
             @Override public int size() { return stackPtr; }
             @Override public boolean setSize(int val) { return false; }
diff --git a/src/main/java/me/topchetoeu/jscript/runtime/SimpleRepl.java b/src/main/java/me/topchetoeu/jscript/runtime/SimpleRepl.java
index daa0d1b..f4b81a8 100644
--- a/src/main/java/me/topchetoeu/jscript/runtime/SimpleRepl.java
+++ b/src/main/java/me/topchetoeu/jscript/runtime/SimpleRepl.java
@@ -1,8 +1,8 @@
 package me.topchetoeu.jscript.runtime;
 
+import java.io.File;
+import java.io.FileInputStream;
 import java.io.IOException;
-import java.nio.file.Files;
-import java.nio.file.Path;
 import java.util.concurrent.CancellationException;
 import java.util.concurrent.ExecutionException;
 
@@ -13,7 +13,6 @@ import me.topchetoeu.jscript.common.json.JSON;
 import me.topchetoeu.jscript.common.parsing.Filename;
 import me.topchetoeu.jscript.runtime.debug.DebugContext;
 import me.topchetoeu.jscript.runtime.exceptions.EngineException;
-import me.topchetoeu.jscript.runtime.exceptions.InterruptException;
 import me.topchetoeu.jscript.runtime.exceptions.SyntaxException;
 import me.topchetoeu.jscript.runtime.values.Member.FieldMember;
 import me.topchetoeu.jscript.runtime.values.Member.PropertyMember;
@@ -45,13 +44,13 @@ public class SimpleRepl {
 
             for (var arg : args) {
                 try {
-                    var file = Path.of(arg);
-                    var raw = Files.readString(file);
+                    var file = new File(arg);
+                    var raw = Reading.streamToString(new FileInputStream(file));
 
                     try {
                         var res = engine.pushMsg(
                             false, environment,
-                            Filename.fromFile(file.toFile()), raw, null
+                            Filename.fromFile(file), raw, null
                         ).get();
 
                         System.err.println(res.toReadable(environment));
@@ -195,7 +194,7 @@ public class SimpleRepl {
             var val = new ArrayValue();
 
             for (var key : args.get(0).getOwnMembers(env, args.get(1).toBoolean())) {
-                val.set(val.size(), new StringValue(key));
+                val.set(args.env, val.size(), new StringValue(key));
             }
 
             return val;
@@ -375,7 +374,7 @@ public class SimpleRepl {
 
         glob.defineOwnMember(null, "exit", new NativeFunction("exit", args -> {
             Thread.currentThread().interrupt();
-            throw new InterruptException();
+            throw new CancellationException();
         }));
         glob.defineOwnMember(null, "print", new NativeFunction("print", args -> {
             for (var el : args.args) {
diff --git a/src/main/java/me/topchetoeu/jscript/runtime/exceptions/InterruptException.java b/src/main/java/me/topchetoeu/jscript/runtime/exceptions/InterruptException.java
deleted file mode 100644
index ac7dc0e..0000000
--- a/src/main/java/me/topchetoeu/jscript/runtime/exceptions/InterruptException.java
+++ /dev/null
@@ -1,8 +0,0 @@
-package me.topchetoeu.jscript.runtime.exceptions;
-
-public class InterruptException extends RuntimeException {
-    public InterruptException() { }
-    public InterruptException(Throwable e) {
-        super(e);
-    }
-}