From d8cd5a3361a800ba2ea44f4f95dcadbdffc31d06 Mon Sep 17 00:00:00 2001
From: Daniel Watkins <daniel@daniel-watkins.co.uk>
Date: Fri, 10 Aug 2018 12:39:17 -0400
Subject: [PATCH] Enforce zero arguments to locals

---
 vm/src/builtins.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/vm/src/builtins.rs b/vm/src/builtins.rs
index 3d6a6b44e..b4663ddf8 100644
--- a/vm/src/builtins.rs
+++ b/vm/src/builtins.rs
@@ -161,10 +161,12 @@ fn builtin_len(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
 // builtin_list
 
 fn builtin_locals(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
+    if args.args.len() != 0 {
+        panic!("locals() doesn't take any arguments");
+    }
     Ok(vm.get_locals())
 }
 
-
 pub fn builtin_print(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
     trace!("print called with {:?}", args);
     for a in args.args {