diff --git a/Modules/_io/bufferedio.c b/Modules/_io/bufferedio.c
index 7a0c516411c73b..f30d54a5e11b0a 100644
--- a/Modules/_io/bufferedio.c
+++ b/Modules/_io/bufferedio.c
@@ -2424,13 +2424,6 @@ _io_BufferedRandom___init___impl(buffered *self, PyObject *raw,
#include "clinic/bufferedio.c.h"
#undef clinic_state
-static int
-bufferediobase_traverse(PyObject *self, visitproc visit, void *arg)
-{
- Py_VISIT(Py_TYPE(self));
- return 0;
-}
-
static PyMethodDef bufferediobase_methods[] = {
_IO__BUFFEREDIOBASE_DETACH_METHODDEF
_IO__BUFFEREDIOBASE_READ_METHODDEF
@@ -2444,13 +2437,13 @@ static PyMethodDef bufferediobase_methods[] = {
static PyType_Slot bufferediobase_slots[] = {
{Py_tp_doc, (void *)bufferediobase_doc},
{Py_tp_methods, bufferediobase_methods},
- {Py_tp_traverse, bufferediobase_traverse},
{0, NULL},
};
+/* Do not set Py_TPFLAGS_HAVE_GC so that tp_traverse and tp_clear are inherited */
PyType_Spec bufferediobase_spec = {
.name = "_io._BufferedIOBase",
- .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC |
+ .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
Py_TPFLAGS_IMMUTABLETYPE),
.slots = bufferediobase_slots,
};
diff --git a/Modules/_io/iobase.c b/Modules/_io/iobase.c
index 14d48813aefe83..bcb498d9c5b5de 100644
--- a/Modules/_io/iobase.c
+++ b/Modules/_io/iobase.c
@@ -1036,13 +1036,6 @@ rawiobase_write(PyObject *self, PyObject *args)
return NULL;
}
-static int
-rawiobase_traverse(PyObject *self, visitproc visit, void *arg)
-{
- Py_VISIT(Py_TYPE(self));
- return 0;
-}
-
static PyMethodDef rawiobase_methods[] = {
_IO__RAWIOBASE_READ_METHODDEF
_IO__RAWIOBASE_READALL_METHODDEF
@@ -1054,13 +1047,13 @@ static PyMethodDef rawiobase_methods[] = {
static PyType_Slot rawiobase_slots[] = {
{Py_tp_doc, (void *)rawiobase_doc},
{Py_tp_methods, rawiobase_methods},
- {Py_tp_traverse, rawiobase_traverse},
{0, NULL},
};
+/* Do not set Py_TPFLAGS_HAVE_GC so that tp_traverse and tp_clear are inherited */
PyType_Spec rawiobase_spec = {
.name = "_io._RawIOBase",
- .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC |
+ .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
Py_TPFLAGS_IMMUTABLETYPE),
.slots = rawiobase_slots,
};
diff --git a/Modules/_io/textio.c b/Modules/_io/textio.c
index e858a1fb498f82..46411c70a96753 100644
--- a/Modules/_io/textio.c
+++ b/Modules/_io/textio.c
@@ -167,12 +167,6 @@ textiobase_errors_get(PyObject *self, void *context)
Py_RETURN_NONE;
}
-static int
-textiobase_traverse(PyObject *self, visitproc visit, void *arg)
-{
- Py_VISIT(Py_TYPE(self));
- return 0;
-}
static PyMethodDef textiobase_methods[] = {
_IO__TEXTIOBASE_DETACH_METHODDEF
@@ -193,13 +187,13 @@ static PyType_Slot textiobase_slots[] = {
{Py_tp_doc, (void *)textiobase_doc},
{Py_tp_methods, textiobase_methods},
{Py_tp_getset, textiobase_getset},
- {Py_tp_traverse, textiobase_traverse},
{0, NULL},
};
+/* Do not set Py_TPFLAGS_HAVE_GC so that tp_traverse and tp_clear are inherited */
PyType_Spec textiobase_spec = {
.name = "_io._TextIOBase",
- .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC |
+ .flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
Py_TPFLAGS_IMMUTABLETYPE),
.slots = textiobase_slots,
};
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