From 2af01ebac02a7f2e8962afeb6c82efb746c1a3c3 Mon Sep 17 00:00:00 2001
From: Marc Mueller <30130371+cdce8p@users.noreply.github.com>
Date: Fri, 15 Aug 2025 12:33:57 +0200
Subject: [PATCH] Sort arguments in TypedDict overlap error message

---
 mypy/semanal.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mypy/semanal.py b/mypy/semanal.py
index ebd9515d832df..eef658d9300b2 100644
--- a/mypy/semanal.py
+++ b/mypy/semanal.py
@@ -1059,7 +1059,7 @@ def remove_unpack_kwargs(self, defn: FuncDef, typ: CallableType) -> CallableType
         # It is OK for TypedDict to have a key named 'kwargs'.
         overlap.discard(typ.arg_names[-1])
         if overlap:
-            overlapped = ", ".join([f'"{name}"' for name in overlap])
+            overlapped = ", ".join([f'"{name}"' for name in sorted(filter(None, overlap))])
             self.fail(f"Overlap between argument names and ** TypedDict items: {overlapped}", defn)
             new_arg_types = typ.arg_types[:-1] + [AnyType(TypeOfAny.from_error)]
             return typ.copy_modified(arg_types=new_arg_types)