Backport recent typing updates (GH-6759)

1 files changed, 11 insertions, 2 deletions

diff --git a/Lib/typing.py b/Lib/typing.py
index b5564cc..f2b6aaf 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -1181,10 +1181,18 @@ def _generic_new(base_cls, cls, *args, **kwds):
     # Assure type is erased on instantiation,
     # but attempt to store it in __orig_class__
     if cls.__origin__ is None:
-        return base_cls.__new__(cls)
+        if (base_cls.__new__ is object.__new__ and
+                cls.__init__ is not object.__init__):
+            return base_cls.__new__(cls)
+        else:
+            return base_cls.__new__(cls, *args, **kwds)
     else:
         origin = cls._gorg
-        obj = base_cls.__new__(origin)
+        if (base_cls.__new__ is object.__new__ and
+                cls.__init__ is not object.__init__):
+            obj = base_cls.__new__(origin)
+        else:
+            obj = base_cls.__new__(origin, *args, **kwds)
         try:
             obj.__orig_class__ = cls
         except AttributeError:
@@ -2146,6 +2154,7 @@ class NamedTupleMeta(type):
                                 "follow default field(s) {default_names}"
                                 .format(field_name=field_name,
                                         default_names=', '.join(defaults_dict.keys())))
+        nm_tpl.__new__.__annotations__ = collections.OrderedDict(types)
         nm_tpl.__new__.__defaults__ = tuple(defaults)
         nm_tpl._field_defaults = defaults_dict
         # update from user namespace without overriding special namedtuple attributes