From ccfc9c51ba6e0d3e54d109d9f482595e2eac3b33 Mon Sep 17 00:00:00 2001
From: Damien <damien.p.george@gmail.com>
Date: Sat, 2 Nov 2013 15:10:37 +0000
Subject: [PATCH] Py runtime: list.append returns None.

---
 py/runtime.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/py/runtime.c b/py/runtime.c
index b506c6a549..d97763adf0 100644
--- a/py/runtime.c
+++ b/py/runtime.c
@@ -453,7 +453,7 @@ py_obj_t rt_list_append(py_obj_t self_in, py_obj_t arg) {
         self->u_tuple_list.items = m_renew(py_obj_t, self->u_tuple_list.items, self->u_tuple_list.alloc);
     }
     self->u_tuple_list.items[self->u_tuple_list.len++] = arg;
-    return arg;
+    return py_const_none; // return None, as per CPython
 }
 
 py_obj_t rt_gen_instance_next(py_obj_t self_in) {
-- 
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