bpo-46417: Revert remove_subclass() change (pythonGH-30750)

vstinner · web-flow · commit fda88864980f · 2022-01-21T16:45:14.000+01:00
remove_subclass() doesn't clear the tp_subclasses dict if the dict
becomes empty.
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
@@ -6553,10 +6553,6 @@ remove_subclass(PyTypeObject *base, PyTypeObject *type)
         PyErr_Clear();
     }
     Py_XDECREF(key);
-
-    if (PyDict_Size(dict) == 0) {
-        Py_CLEAR(base->tp_subclasses);
-    }
 }
 
 static void

Original file line number	Diff line number	Diff line change
`@@ -6553,10 +6553,6 @@ remove_subclass(PyTypeObject base, PyTypeObject type)`
`6553`	`6553`	`PyErr_Clear();`
`6554`	`6554`	`}`
`6555`	`6555`	`Py_XDECREF(key);`
`6556`		`-`
`6557`		`- if (PyDict_Size(dict) == 0) {`
`6558`		`- Py_CLEAR(base->tp_subclasses);`
`6559`		`- }`
`6560`	`6556`	`}`
`6561`	`6557`
`6562`	`6558`	`static void`