From d1d5dce14f90d777608e4403d09079421ff55944 Mon Sep 17 00:00:00 2001
From: William S Fulton <wsf@fultondesigns.co.uk>
Date: Fri, 4 Jul 2025 16:54:00 +0100
Subject: [PATCH] gh-136288: Fix error message in `_testcapi/vectorcall.c`
 (GH-136258)

Use the %N format specifier instead of %s and `PyType_GetName`.
---
 Modules/_testcapi/vectorcall.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Modules/_testcapi/vectorcall.c b/Modules/_testcapi/vectorcall.c
index 03aaacb328e..f89dcb6c4cf 100644
--- a/Modules/_testcapi/vectorcall.c
+++ b/Modules/_testcapi/vectorcall.c
@@ -179,14 +179,14 @@ _testcapi_VectorCallClass_set_vectorcall_impl(PyObject *self,
     if (!PyObject_TypeCheck(self, type)) {
         return PyErr_Format(
             PyExc_TypeError,
-            "expected %s instance",
-            PyType_GetName(type));
+            "expected %N instance",
+            type);
     }
     if (!type->tp_vectorcall_offset) {
         return PyErr_Format(
             PyExc_TypeError,
-            "type %s has no vectorcall offset",
-            PyType_GetName(type));
+            "type %N has no vectorcall offset",
+            type);
     }
     *(vectorcallfunc*)((char*)self + type->tp_vectorcall_offset) = (
         VectorCallClass_vectorcall);