diff --git a/main.cpp b/main.cpp
index ff3affd..ff9fd9c 100644
--- a/main.cpp
+++ b/main.cpp
@@ -28,9 +28,9 @@ int main() {
             std::cout << "    ";
         } catch (exceptions::exit& e) {
             return e.code;
-        } /*catch (exceptions::langException& e) {
+        } catch (exceptions::langException& e) {
             std::cout << "E: Language exception: " << e.what() << std::endl;
             line.clear();
-        }*/
+        }
     }
 }
diff --git a/pilang.cpp b/pilang.cpp
index 5afca21..4919cd3 100644
--- a/pilang.cpp
+++ b/pilang.cpp
@@ -321,10 +321,12 @@ namespace Pilang3 {
             scope[argumentNames[args_idx - 1]] = std::make_shared<Variable>(args[args_idx - 1]);
         }
         env->variableScope.push(scope); // Start new scope
-        // Execute all evaluations
+        // Copy, derefer and execute all evaluations
         for (auto& evaluation : evalChain) {
-            evaluation->derefer(env);
-            fres = evaluation->execute(env);
+            auto thiseval = Evaluation(*evaluation);
+            thiseval.derefer(env);
+            fres = thiseval.execute(env);
+            // Return on return
             if (fres.type == Variable::id_retval) {
                 auto fresdata = std::get<SharedVariable>(fres.data);
                 env->variableScope.pop(); // End scope