diff --git a/lib/src/main/java/me/topchetoeu/j2s/lib/Compilers.java b/lib/src/main/java/me/topchetoeu/j2s/lib/Compilers.java
index 73b653d..2f8335f 100644
--- a/lib/src/main/java/me/topchetoeu/j2s/lib/Compilers.java
+++ b/lib/src/main/java/me/topchetoeu/j2s/lib/Compilers.java
@@ -59,6 +59,8 @@ public class Compilers {
 
 	public static Compiler transpilerFromSource(Compiler prev, Environment target, Filename compilerName, String compilerSrc) {
 		var env = StdLib.apply(null);
+		// var handler = new SimpleDebugHandler();
+		// env.add(DebugHandler.KEY, handler);
 
 		var glob = Value.global(env);
 		var compilerFactory = new FunctionValue[1];
@@ -83,9 +85,19 @@ public class Compilers {
 		}));
 
 		var compiled = JavaScript.compile(compilerName, compilerSrc, false);
-		new CodeFunction(env, "intializer", compiled.body(), new Value[0][]).apply(env, Value.UNDEFINED);
 
-		return wrap(prev, env, target, compilerFactory[0]);
+		// for (var el : compiled.all()) {
+		// 	handler.onFunctionLoad(el.body(), el.map());
+		// }
+
+		try {
+			new CodeFunction(env, "intializer", compiled.body(), new Value[0][]).apply(env, Value.UNDEFINED);
+			return wrap(prev, env, target, compilerFactory[0]);
+		}
+		catch (EngineException e) {
+			System.out.println(Value.errorToReadable(env, e, "in transpiler initializer"));
+			return prev;
+		}
 	}
 
 	public static Compiler babelCompiler(Compiler prev, Environment target) {
@@ -111,7 +123,7 @@ public class Compilers {
 		Compiler create(Compiler prev, Environment target);
 	}
 
-	public static Compiler chainTranspilers(Environment target, Compiler base, TranspilerFactory ...factories) {
+	public static Compiler chainTranspilers(Compiler base, Environment target, TranspilerFactory ...factories) {
 		var res = base;
 
 		for (var el : factories) {
diff --git a/lib/src/main/java/me/topchetoeu/j2s/lib/StdLib.java b/lib/src/main/java/me/topchetoeu/j2s/lib/StdLib.java
index d981bd7..9644466 100644
--- a/lib/src/main/java/me/topchetoeu/j2s/lib/StdLib.java
+++ b/lib/src/main/java/me/topchetoeu/j2s/lib/StdLib.java
@@ -6,24 +6,36 @@ import me.topchetoeu.j2s.common.Metadata;
 import me.topchetoeu.j2s.common.Reading;
 import me.topchetoeu.j2s.compilation.CompileResult;
 import me.topchetoeu.j2s.compilation.JavaScript;
+import me.topchetoeu.j2s.runtime.exceptions.EngineException;
 import me.topchetoeu.j2s.runtime.values.Value;
 import me.topchetoeu.j2s.runtime.values.functions.CodeFunction;
 
 public class StdLib {
-	private static final CompileResult RUNNER = JavaScript.compile(new Filename(Metadata.name(), "init.js"), Reading.resourceToString("lib/stdlib.js"), false);
+	private static final CompileResult RUNNER = JavaScript.compile(
+		new Filename(Metadata.name(), "init.js"),
+		Reading.resourceToString("lib/stdlib.js"), false
+	);
 
-	public static Environment apply(Environment env) {
-		if (env == null) {
-			env = new Environment();
-		}
+	public static Environment apply(Environment env, CompileResult body) {
+		env = new Environment();
 
 		var stubEnv = new Environment();
 		Value.global(stubEnv).defineOwnField(stubEnv, "target", Value.global(env));
 		Value.global(stubEnv).defineOwnField(stubEnv, "primordials", Primordials.create(env));
 
-		var func = new CodeFunction(stubEnv, "intializer", RUNNER.body(), new Value[0][]);
-		func.apply(stubEnv, Value.UNDEFINED);
-
+		var func = new CodeFunction(stubEnv, "intializer", body.body(), new Value[0][]);
+		try {
+			func.apply(stubEnv, Value.UNDEFINED);
+		}
+		catch (EngineException e) {
+			System.out.println(Value.errorToReadable(env, e, "in environment initializer"));
+		}
+	
 		return env;
 	}
+
+	public static Environment apply(Environment env) {
+		if (env == null) env = new Environment();
+		return apply(env, RUNNER);
+	}
 }
diff --git a/repl/src/main/java/me/topchetoeu/j2s/repl/SimpleRepl.java b/repl/src/main/java/me/topchetoeu/j2s/repl/SimpleRepl.java
index 6054eaf..a153f6b 100644
--- a/repl/src/main/java/me/topchetoeu/j2s/repl/SimpleRepl.java
+++ b/repl/src/main/java/me/topchetoeu/j2s/repl/SimpleRepl.java
@@ -2,6 +2,7 @@ package me.topchetoeu.j2s.repl;
 
 import java.io.File;
 import java.io.FileInputStream;
+import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
@@ -17,10 +18,10 @@ import me.topchetoeu.j2s.common.Reading;
 import me.topchetoeu.j2s.common.SyntaxException;
 import me.topchetoeu.j2s.lib.Compilers;
 import me.topchetoeu.j2s.lib.StdLib;
-import me.topchetoeu.j2s.repl.debug.SimpleDebugHandler;
-import me.topchetoeu.j2s.repl.debug.DebugServer;
-import me.topchetoeu.j2s.repl.debug.Debugger;
-import me.topchetoeu.j2s.repl.debug.SimpleDebugger;
+import me.topchetoeu.j2s.lib.debug.DebugServer;
+import me.topchetoeu.j2s.lib.debug.Debugger;
+import me.topchetoeu.j2s.lib.debug.SimpleDebugHandler;
+import me.topchetoeu.j2s.lib.debug.SimpleDebugger;
 import me.topchetoeu.j2s.runtime.Compiler;
 import me.topchetoeu.j2s.runtime.Engine;
 import me.topchetoeu.j2s.runtime.EventLoop;
@@ -104,11 +105,10 @@ public class SimpleRepl {
 	}
 
 	private static Environment createESEnv() {
-		var env = new Environment();
+		var env = StdLib.apply(null);
 		env.add(EventLoop.KEY, engine);
 		env.add(DebugHandler.KEY, new SimpleDebugHandler());
-		env.add(Compiler.KEY, Compilers.chainTranspilers(environment, Compilers.jsCompiler(), Compilers::babelCompiler, Compilers::coffeescriptCompiler));
-		StdLib.apply(env);
+		env.add(Compiler.KEY, Compilers.chainTranspilers(Compilers.jsCompiler(), env, Compilers::babelCompiler));
 
 		var glob = Value.global(env);
 
@@ -116,6 +116,18 @@ public class SimpleRepl {
 			Thread.currentThread().interrupt();
 			throw new CancellationException();
 		}));
+		glob.defineOwnField(null, "dofile", new NativeFunction("dofile", args -> {
+			var file = args.get(0).toString(args.env);
+			var filename = new Filename("file", new File(file).getAbsolutePath());
+
+			try {
+				var src = Reading.streamToString(new FileInputStream(file));
+				return Compiler.get(args.env).compile(args.env, filename, src, v -> v).apply(args.env, Value.UNDEFINED);
+			}
+			catch (FileNotFoundException e) {
+				throw EngineException.ofError("IOException", e.getMessage());
+			}
+		}));
 
 		return env;
 	}
diff --git a/runtime/src/main/java/me/topchetoeu/j2s/runtime/Frame.java b/runtime/src/main/java/me/topchetoeu/j2s/runtime/Frame.java
index 26d442a..cfd6e81 100644
--- a/runtime/src/main/java/me/topchetoeu/j2s/runtime/Frame.java
+++ b/runtime/src/main/java/me/topchetoeu/j2s/runtime/Frame.java
@@ -209,7 +209,7 @@ public final class Frame {
 						returnValue = InstructionRunner.exec(env, instr, this);
 					}
 					catch (EngineException e) {
-						error = e.add(env, function.name, dbg.getMapOrEmpty(env, function).toLocation(codePtr));
+						error = e.add(env, function.name, dbg.getMapOrEmpty(env, function).toLocation(codePtr, true));
 					}
 				}
 			}
diff --git a/runtime/src/main/java/me/topchetoeu/j2s/runtime/values/functions/CodeFunction.java b/runtime/src/main/java/me/topchetoeu/j2s/runtime/values/functions/CodeFunction.java
index 8dbff7d..052356f 100644
--- a/runtime/src/main/java/me/topchetoeu/j2s/runtime/values/functions/CodeFunction.java
+++ b/runtime/src/main/java/me/topchetoeu/j2s/runtime/values/functions/CodeFunction.java
@@ -26,7 +26,7 @@ public final class CodeFunction extends FunctionValue {
 	}
 
 	@Override protected Value onApply(Environment env, Value self, Value... args) {
-		var frame = new Frame(env, false, null, self, args, this);
+		var frame = new Frame(this.env, false, null, self, args, this);
 		var res = onCall(frame);
 		return res;
 	}
@@ -37,7 +37,7 @@ public final class CodeFunction extends FunctionValue {
 		if (proto instanceof ObjectValue) self.setPrototype(env, (ObjectValue)proto);
 		else if (proto == Value.NULL) self.setPrototype(env, null);
 
-		var frame = new Frame(env, true, target, self, args, this);
+		var frame = new Frame(this.env, true, target, self, args, this);
 
 		var ret = onCall(frame);