From 75dda3b12d689d1e90ae198cd9509e529826557a Mon Sep 17 00:00:00 2001
From: Serhiy Storchaka <storchaka@gmail.com>
Date: Sat, 25 Jun 2022 18:45:46 +0300
Subject: [PATCH] [3.10] gh-94245: Fix pickling and copying of typing.Tuple[()]
 (GH-94260)

---
 Lib/typing.py                                                  | 3 ++-
 .../next/Library/2022-06-25-13-33-18.gh-issue-94245.-zQY1a.rst | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)
 create mode 100644 Misc/NEWS.d/next/Library/2022-06-25-13-33-18.gh-issue-94245.-zQY1a.rst

diff --git a/Lib/typing.py b/Lib/typing.py
index 086d0f3f9594c7..9f8710b9f773b8 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -1099,7 +1099,8 @@ def __reduce__(self):
         else:
             origin = self.__origin__
         args = tuple(self.__args__)
-        if len(args) == 1 and not isinstance(args[0], tuple):
+        if len(args) == 1 and (not isinstance(args[0], tuple) or
+                               origin is Tuple and not args[0]):
             args, = args
         return operator.getitem, (origin, args)
 
diff --git a/Misc/NEWS.d/next/Library/2022-06-25-13-33-18.gh-issue-94245.-zQY1a.rst b/Misc/NEWS.d/next/Library/2022-06-25-13-33-18.gh-issue-94245.-zQY1a.rst
new file mode 100644
index 00000000000000..de84918d5eceea
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2022-06-25-13-33-18.gh-issue-94245.-zQY1a.rst
@@ -0,0 +1 @@
+Fix pickling and copying of ``typing.Tuple[()]``.