From 59310943becad11f336a3f7e1219b4e93b9ee73f Mon Sep 17 00:00:00 2001
From: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Date: Mon, 6 May 2024 08:23:09 -0700
Subject: [PATCH] Fix test, add blurb

---
 Lib/typing.py                                                   | 2 +-
 .../next/Library/2024-05-06-08-23-01.gh-issue-118648.OVA3jJ.rst | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)
 create mode 100644 Misc/NEWS.d/next/Library/2024-05-06-08-23-01.gh-issue-118648.OVA3jJ.rst

diff --git a/Lib/typing.py b/Lib/typing.py
index d9e440fe78a27e..dca11cc8c1a8d6 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -1328,7 +1328,7 @@ def __getattr__(self, attr):
         raise AttributeError(attr)
 
     def __setattr__(self, attr, val):
-        if _is_dunder(attr) or attr in {'_name', '_inst', '_nparams'}:
+        if _is_dunder(attr) or attr in {'_name', '_inst', '_nparams', '_defaults'}:
             super().__setattr__(attr, val)
         else:
             setattr(self.__origin__, attr, val)
diff --git a/Misc/NEWS.d/next/Library/2024-05-06-08-23-01.gh-issue-118648.OVA3jJ.rst b/Misc/NEWS.d/next/Library/2024-05-06-08-23-01.gh-issue-118648.OVA3jJ.rst
new file mode 100644
index 00000000000000..7695fb0ba20df8
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2024-05-06-08-23-01.gh-issue-118648.OVA3jJ.rst
@@ -0,0 +1,2 @@
+Add type parameter defaults to :class:`typing.Generator` and
+:class:`typing.AsyncGenerator`.