From 4b20f2574d412f4c4a5b1ab799d8e71a5dd3b766 Mon Sep 17 00:00:00 2001
From: Hai Shi <shihai1992@gmail.com>
Date: Mon, 31 May 2021 15:51:19 +0800
Subject: [PATCH] bpo-42972: Fully implement GC protocol for xxlimited
 (GH-26451)

---
 Modules/xxlimited.c    | 8 ++++++++
 Modules/xxlimited_35.c | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/Modules/xxlimited.c b/Modules/xxlimited.c
index c3d98d34eb5..9bd9a5407d4 100644
--- a/Modules/xxlimited.c
+++ b/Modules/xxlimited.c
@@ -106,6 +106,13 @@ Xxo_traverse(XxoObject *self, visitproc visit, void *arg)
     return 0;
 }
 
+static int
+Xxo_clear(XxoObject *self)
+{
+    Py_CLEAR(self->x_attr);
+    return 0;
+}
+
 static void
 Xxo_finalize(XxoObject *self)
 {
@@ -214,6 +221,7 @@ PyDoc_STRVAR(Xxo_doc,
 static PyType_Slot Xxo_Type_slots[] = {
     {Py_tp_doc, (char *)Xxo_doc},
     {Py_tp_traverse, Xxo_traverse},
+    {Py_tp_clear, Xxo_clear},
     {Py_tp_finalize, Xxo_finalize},
     {Py_tp_dealloc, Xxo_dealloc},
     {Py_tp_getattro, Xxo_getattro},
diff --git a/Modules/xxlimited_35.c b/Modules/xxlimited_35.c
index 5e93854f685..647abf67212 100644
--- a/Modules/xxlimited_35.c
+++ b/Modules/xxlimited_35.c
@@ -43,6 +43,13 @@ Xxo_traverse(XxoObject *self, visitproc visit, void *arg)
     return 0;
 }
 
+static int
+Xxo_clear(XxoObject *self)
+{
+    Py_CLEAR(self->x_attr);
+    return 0;
+}
+
 static void
 Xxo_finalize(XxoObject *self)
 {
@@ -108,6 +115,7 @@ Xxo_setattr(XxoObject *self, const char *name, PyObject *v)
 static PyType_Slot Xxo_Type_slots[] = {
     {Py_tp_doc, "The Xxo type"},
     {Py_tp_traverse, Xxo_traverse},
+    {Py_tp_clear, Xxo_clear},
     {Py_tp_finalize, Xxo_finalize},
     {Py_tp_getattro, Xxo_getattro},
     {Py_tp_setattr, Xxo_setattr},