py: Check that sequence has 2 elements for dict iterable constructor.
diff --git a/py/obj.c b/py/obj.c
index 844ec41..623b396 100644
--- a/py/obj.c
+++ b/py/obj.c
@@ -280,7 +280,7 @@
             mp_obj_list_get(o, &seq_len, items);
         }
         if (seq_len != len) {
-            nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_IndexError, "requested length %d but object has length %d", len, seq_len));
+            nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "requested length %d but object has length %d", len, seq_len));
         }
     } else {
         nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "object '%s' is not a tuple or list", mp_obj_get_type_str(o)));