Use %T

donbarbos · donbarbos · commit 22baff634a79 · 2025-08-13T10:43:43.000+04:00
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
@@ -3516,8 +3516,8 @@ mro_check(PyTypeObject *type, PyObject *mro)
         if (!is_subtype_with_mro(lookup_tp_mro(solid), solid, solid_base(base))) {
             PyErr_Format(
                 PyExc_TypeError,
-                "%N.mro() returned base with unsuitable layout ('%.500s')",
-                type, base->tp_name);
+                "%N.mro() returned base with unsuitable layout ('%T')",
+                type, base);
             return -1;
         }
     }

Original file line number	Diff line number	Diff line change
`@@ -3516,8 +3516,8 @@ mro_check(PyTypeObject type, PyObject mro)`
`3516`	`3516`	`if (!is_subtype_with_mro(lookup_tp_mro(solid), solid, solid_base(base))) {`
`3517`	`3517`	`PyErr_Format(`
`3518`	`3518`	`PyExc_TypeError,`
`3519`		`- "%N.mro() returned base with unsuitable layout ('%.500s')",`
`3520`		`- type, base->tp_name);`
	`3519`	`+ "%N.mro() returned base with unsuitable layout ('%T')",`
	`3520`	`+ type, base);`
`3521`	`3521`	`return -1;`
`3522`	`3522`	`}`
`3523`	`3523`	`}`