diff --git a/examples/test.lua b/examples/test.lua
index 61d42c9..6fa487d 100644
--- a/examples/test.lua
+++ b/examples/test.lua
@@ -8,4 +8,4 @@ function test()
     return add(10)(15)
 end
 
-global c = print(test())
\ No newline at end of file
+local c = print(test())
\ No newline at end of file
diff --git a/src/vm.rs b/src/vm.rs
index 0b056bd..131b82d 100644
--- a/src/vm.rs
+++ b/src/vm.rs
@@ -282,8 +282,10 @@ impl ClosureRunner {
                         }
                         _ => {
                             dbg!(&value);
-                            for i in 0..=(*ret_len - 2) {
-                                self.stack.insert(*func_reg + i, Value::Nil);
+                            if *ret_len > 0 {
+                                for i in 0..=(*ret_len - 2) {
+                                    self.stack.insert(*func_reg + i, Value::Nil);
+                                }
                             }
                         }
                     }