fix refleak in deque_concat
diff --git a/Modules/_collectionsmodule.c b/Modules/_collectionsmodule.c
index 9f6c47f..2b70b2b 100644
--- a/Modules/_collectionsmodule.c
+++ b/Modules/_collectionsmodule.c
@@ -507,7 +507,7 @@
static PyObject *
deque_concat(dequeobject *deque, PyObject *other)
{
- PyObject *new_deque;
+ PyObject *new_deque, *result;
int rv;
rv = PyObject_IsInstance(other, (PyObject *)&deque_type);
@@ -523,7 +523,13 @@
new_deque = deque_copy((PyObject *)deque);
if (new_deque == NULL)
return NULL;
- return deque_inplace_concat((dequeobject *)new_deque, other);
+ result = deque_extend((dequeobject *)new_deque, other);
+ if (result == NULL) {
+ Py_DECREF(new_deque);
+ return NULL;
+ }
+ Py_DECREF(result);
+ return new_deque;
}
static void deque_clear(dequeobject *deque);