add test and news

Signed-off-by: Manjusaka <me@manjusaka.me>

Author: Zheaoli

Lib/test/test_ctypes/test_funcptr.py

@@ -130,6 +130,14 @@ def c_string(init):
     def test_abstract(self):
         self.assertRaises(TypeError, _CFuncPtr, 13, "name", 42, "iid")
 
+    def test_invalid_argtypes(self):
+        libc = CDLL(None)
+
+        PRINTF_PROTO = CFUNCTYPE(c_int, ctypes.c_char_p)
+        c_printf = PRINTF_PROTO(("printf", libc), ((1,),))
+        c_printf.argtypes = (c_char_p, c_int)
+        with self.assertRaises(TypeError):
+            c_printf(b"Hello\n")
 
 if __name__ == '__main__':
     unittest.main()

Misc/NEWS.d/next/Library/2025-08-27-01-04-38.gh-issue-138008.iCEhZ9.rst

@@ -0,0 +1 @@
+Fix segfaults in _cyptes during _build_callargs.