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-rw-r--r--Objects/descrobject.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/Objects/descrobject.c b/Objects/descrobject.c
index 11c68d3..93daefd 100644
--- a/Objects/descrobject.c
+++ b/Objects/descrobject.c
@@ -226,7 +226,8 @@ methoddescr_call(PyMethodDescrObject *descr, PyObject *args, PyObject *kwds)
return NULL;
}
self = PyTuple_GET_ITEM(args, 0);
- if (!PyObject_IsInstance(self, (PyObject *)PyDescr_TYPE(descr))) {
+ if (!_PyObject_RealIsSubclass((PyObject *)Py_TYPE(self),
+ (PyObject *)PyDescr_TYPE(descr))) {
PyErr_Format(PyExc_TypeError,
"descriptor '%V' "
"requires a '%.100s' object "
@@ -284,7 +285,8 @@ wrapperdescr_call(PyWrapperDescrObject *descr, PyObject *args, PyObject *kwds)
return NULL;
}
self = PyTuple_GET_ITEM(args, 0);
- if (!PyObject_IsInstance(self, (PyObject *)PyDescr_TYPE(descr))) {
+ if (!_PyObject_RealIsSubclass((PyObject *)Py_TYPE(self),
+ (PyObject *)PyDescr_TYPE(descr))) {
PyErr_Format(PyExc_TypeError,
"descriptor '%V' "
"requires a '%.100s' object "
@@ -1065,7 +1067,8 @@ PyWrapper_New(PyObject *d, PyObject *self)
assert(PyObject_TypeCheck(d, &PyWrapperDescr_Type));
descr = (PyWrapperDescrObject *)d;
- assert(PyObject_IsInstance(self, (PyObject *)PyDescr_TYPE(descr)));
+ assert(_PyObject_RealIsSubclass((PyObject *)Py_TYPE(self),
+ (PyObject *)PyDescr_TYPE(descr)));
wp = PyObject_GC_New(wrapperobject, &wrappertype);
if (wp != NULL) {