From 36d65931024f90d8e7cca42c8d6c90ec5776d37d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?B=C3=A9n=C3=A9dikt=20Tran?=
 <10796600+picnixz@users.noreply.github.com>
Date: Thu, 3 Aug 2023 13:46:18 +0200
Subject: [PATCH] update CHANGES

---
 CHANGES                                 | 12 ++++++++++++
 sphinx/ext/autodoc/preserve_defaults.py |  4 ++--
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/CHANGES b/CHANGES
index 645a6cd4c9d..03ed7e55728 100644
--- a/CHANGES
+++ b/CHANGES
@@ -9,6 +9,12 @@ Dependencies
 Incompatible changes
 --------------------
 
+* #11459: ``sphinx.ext.autodoc.preserve_defaults.get_function_def`` is
+  renamed ``sphinx.ext.autodoc.preserve_defaults.get_arguments`` and its
+  signature is updated accordingly. It now extracts the ``ast.arguments`` from
+  a function or a lambda function object.
+  Patch by Bénédikt Tran.
+
 Deprecated
 ----------
 
@@ -36,12 +42,18 @@ Features added
   Patch by Rouslan Korneychuk.
 * 10938: doctest: Add :confval:`doctest_show_successes` option.
   Patch by Trey Hunner.
+* #11459: ``sphinx.ext.autodoc.preserve_defaults``: Add support for
+  ``async def`` functions and lambda functions.
+  Patch by Bénédikt Tran.
 
 Bugs fixed
 ----------
 
 * #11077: graphviz: Fix relative links from within the graph.
   Patch by Ralf Grubenmann.
+* #11459: ``sphinx.ext.autodoc.preserve_defaults``: fix lambda functions
+  used inside ``@property`` should be ignored in a multi-line context.
+  Patch by Bénédikt Tran.
 * #11529: Line Block in LaTeX builder outputs spurious empty token.
   Patch by Adrian Vollmer.
 
diff --git a/sphinx/ext/autodoc/preserve_defaults.py b/sphinx/ext/autodoc/preserve_defaults.py
index 295c7f9468e..3622aa9fbc5 100644
--- a/sphinx/ext/autodoc/preserve_defaults.py
+++ b/sphinx/ext/autodoc/preserve_defaults.py
@@ -46,7 +46,7 @@ def get_arguments(obj: Any) -> ast.arguments | None:
             # subject is placed inside class or block.  To read its docstring,
             # this adds if-block before the declaration.
             module = ast.parse('if True:\n' + source)
-            subject = module.body[0].body[0]
+            subject = module.body[0].body[0]  # type: ignore[attr-defined]
         else:
             module = ast.parse(source)
             subject = module.body[0]
@@ -67,7 +67,7 @@ def get_arguments(obj: Any) -> ast.arguments | None:
         # propagated).
         raise
 
-    def _get_arguments(x: ast.AST) -> ast.arguments | None:
+    def _get_arguments(x: Any) -> ast.arguments | None:
         if isinstance(x, (ast.AsyncFunctionDef, ast.FunctionDef, ast.Lambda)):
             return x.args
         if isinstance(x, (ast.Assign, ast.AnnAssign)):