diff --git a/matrix/src/parse.rs b/matrix/src/parse.rs
index c6c503b..f3814fb 100644
--- a/matrix/src/parse.rs
+++ b/matrix/src/parse.rs
@@ -223,7 +223,7 @@ impl Parser {
                 self.force_token(T::RightBrack)?;
                 expr
             },
-            T::Ident(ident) => E::Ident(ident),
+            T::Ident(ident) => E::Literal(V::String(ident.to_string().into())),
             T::String(string) => E::Literal(V::String(string.to_string().into())),
             _ => return Err(Error::UnexpectedToken(tok).into())
         })
diff --git a/matrix/src/vm.rs b/matrix/src/vm.rs
index bb105d8..fec34b5 100644
--- a/matrix/src/vm.rs
+++ b/matrix/src/vm.rs
@@ -181,6 +181,8 @@ impl Vm {
     pub fn run(&mut self, fun: Rc<Function>) -> Result<Value> {
         let mut frame = self.init_frame(fun)?;
         self.interupt.store(0, Ordering::SeqCst);
+        self.stack = Stack::new();
+        self.locals = Stack::new();
 
         loop {
             use Instruction::*;
@@ -303,6 +305,7 @@ impl Vm {
                     };
                     let ret = self.pop();
                     self.stack.truncate(frame.bp);
+                    self.locals.truncate(0);
                     self.push(ret);
                     frame = prev_frame;
                 },