improvemnt information

tiramisu/setting.py

@@ -633,9 +633,13 @@ class Settings(object):
                                              " '{0}' with requirement on: "
                                              "'{1}'").format(path, reqpath))
                 try:
+                    if option.impl_is_multi():
+                        idx = index
+                    else:
+                        idx = None
                     value = context.getattr(reqpath, force_permissive=True,
                                             _setting_properties=setting_properties,
-                                            index=index)
+                                            index=idx)
                 except PropertiesOptionError as err:
                     if not transitive:
                         continue