From 77b45fa6d0b8c0c14657b5117b21a3f3f2ce97d8 Mon Sep 17 00:00:00 2001
From: Serhiy Storchaka <storchaka@gmail.com>
Date: Sat, 13 Jan 2024 15:26:55 +0200
Subject: [PATCH] gh-111803: Support loading more deeply nested lists in binary
 plist format (GH-114024)

It no longer uses the C stack. The depth of nesting is only limited by
Python recursion limit setting.
---
 Lib/plistlib.py                                                | 3 ++-
 .../Library/2024-01-13-14-20-31.gh-issue-111803.llpLAw.rst     | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)
 create mode 100644 Misc/NEWS.d/next/Library/2024-01-13-14-20-31.gh-issue-111803.llpLAw.rst

diff --git a/Lib/plistlib.py b/Lib/plistlib.py
index 188a0b399b587b..67e832db217319 100644
--- a/Lib/plistlib.py
+++ b/Lib/plistlib.py
@@ -600,7 +600,8 @@ def _read_object(self, ref):
             obj_refs = self._read_refs(s)
             result = []
             self._objects[ref] = result
-            result.extend(self._read_object(x) for x in obj_refs)
+            for x in obj_refs:
+                result.append(self._read_object(x))
 
         # tokenH == 0xB0 is documented as 'ordset', but is not actually
         # implemented in the Apple reference code.
diff --git a/Misc/NEWS.d/next/Library/2024-01-13-14-20-31.gh-issue-111803.llpLAw.rst b/Misc/NEWS.d/next/Library/2024-01-13-14-20-31.gh-issue-111803.llpLAw.rst
new file mode 100644
index 00000000000000..546a892b55ccd7
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2024-01-13-14-20-31.gh-issue-111803.llpLAw.rst
@@ -0,0 +1,2 @@
+:mod:`plistlib` now supports loading more deeply nested lists in binary
+format.