Merge pull request #85 from fxpl/immutable-reachable-for-python-types

xFrednet · web-flow · commit 5f1eae215ccd · 2026-03-16T10:58:14.000+01:00
Set `tp_reachable` for Python classes
diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
@@ -232,6 +232,10 @@ builtin___build_class__(PyObject *self, PyObject *const *args, Py_ssize_t nargs,
                 Py_DECREF(cell_cls);
             }
         }
+        if (cls != NULL && PyType_Check(cls)) {
+            PyTypeObject *tp = _PyType_CAST(cls);
+            tp->tp_reachable = tp->tp_traverse;
+        }
     }
 error:
     Py_XDECREF(cell);

Original file line number	Diff line number	Diff line change
`@@ -232,6 +232,10 @@ builtin___build_class__(PyObject self, PyObject const *args, Py_ssize_t nargs,`
`232`	`232`	`Py_DECREF(cell_cls);`
`233`	`233`	`}`
`234`	`234`	`}`
	`235`	`+ if (cls != NULL && PyType_Check(cls)) {`
	`236`	`+ PyTypeObject *tp = _PyType_CAST(cls);`
	`237`	`+ tp->tp_reachable = tp->tp_traverse;`
	`238`	`+ }`
`235`	`239`	`}`
`236`	`240`	`error:`
`237`	`241`	`Py_XDECREF(cell);`