commit c5444b355695755035d4a5cadc0467e850bb04c2
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Thu May 10 20:30:47 2018 -0700
committer GitHub <noreply@github.com> Thu May 10 20:30:47 2018 -0700
tree 809e261fb4bd69bfd25beccc7a8c2bc8ed21bb66
parent 22df4187c3882c6ec67180902e1151e65b03aee0

Fix a bug in Generic.__new__ (GH-6758)

(cherry picked from commit b551e9f0ff25018a5606465003e2c51c04f693a3)

Co-authored-by: Ivan Levkivskyi <levkivskyi@gmail.com>

Lib/typing.py

diff --git a/Lib/typing.py b/Lib/typing.py
index 89b73db..8025dfd 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -836,7 +836,7 @@
         if cls is Generic:
             raise TypeError("Type Generic cannot be instantiated; "
                             "it can be used only as a base class")
-        if super().__new__ is object.__new__:
+        if super().__new__ is object.__new__ and cls.__init__ is not object.__init__:
             obj = super().__new__(cls)
         else:
             obj = super().__new__(cls, *args, **kwds)