Issue #8404: Fix set operations on dictionary views.
diff --git a/Objects/dictobject.c b/Objects/dictobject.c
index be25176..2ab1520 100644
--- a/Objects/dictobject.c
+++ b/Objects/dictobject.c
@@ -3000,13 +3000,14 @@
0, /*nb_add*/
(binaryfunc)dictviews_sub, /*nb_subtract*/
0, /*nb_multiply*/
+ 0, /*nb_divide*/
0, /*nb_remainder*/
0, /*nb_divmod*/
0, /*nb_power*/
0, /*nb_negative*/
0, /*nb_positive*/
0, /*nb_absolute*/
- 0, /*nb_bool*/
+ 0, /*nb_nonzero*/
0, /*nb_invert*/
0, /*nb_lshift*/
0, /*nb_rshift*/
@@ -3040,7 +3041,8 @@
PyObject_GenericGetAttr, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
- Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
+ Py_TPFLAGS_CHECKTYPES, /* tp_flags */
0, /* tp_doc */
(traverseproc)dictview_traverse, /* tp_traverse */
0, /* tp_clear */
@@ -3124,7 +3126,8 @@
PyObject_GenericGetAttr, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
- Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
+ Py_TPFLAGS_CHECKTYPES, /* tp_flags */
0, /* tp_doc */
(traverseproc)dictview_traverse, /* tp_traverse */
0, /* tp_clear */