diff -r f7db966c9fee Objects/memoryobject.c
--- a/Objects/memoryobject.c	Sun Nov 01 00:55:31 2015 +0300
+++ b/Objects/memoryobject.c	Sun Nov 01 15:55:28 2015 +0200
@@ -63,13 +63,12 @@ mbuf_alloc(void)
     _PyManagedBufferObject *mbuf;
 
     mbuf = (_PyManagedBufferObject *)
-        PyObject_GC_New(_PyManagedBufferObject, &_PyManagedBuffer_Type);
+        PyObject_New(_PyManagedBufferObject, &_PyManagedBuffer_Type);
     if (mbuf == NULL)
         return NULL;
     mbuf->flags = 0;
     mbuf->exports = 0;
     mbuf->master.obj = NULL;
-    _PyObject_GC_TRACK(mbuf);
 
     return mbuf;
 }
@@ -103,7 +102,6 @@ mbuf_release(_PyManagedBufferObject *sel
     self->flags |= _Py_MANAGED_BUFFER_RELEASED;
 
     /* PyBuffer_Release() decrements master->obj and sets it to NULL. */
-    _PyObject_GC_UNTRACK(self);
     PyBuffer_Release(&self->master);
 }
 
@@ -114,22 +112,7 @@ mbuf_dealloc(_PyManagedBufferObject *sel
     mbuf_release(self);
     if (self->flags&_Py_MANAGED_BUFFER_FREE_FORMAT)
         PyMem_Free(self->master.format);
-    PyObject_GC_Del(self);
-}
-
-static int
-mbuf_traverse(_PyManagedBufferObject *self, visitproc visit, void *arg)
-{
-    Py_VISIT(self->master.obj);
-    return 0;
-}
-
-static int
-mbuf_clear(_PyManagedBufferObject *self)
-{
-    assert(self->exports >= 0);
-    mbuf_release(self);
-    return 0;
+    PyObject_Del(self);
 }
 
 PyTypeObject _PyManagedBuffer_Type = {
@@ -152,10 +135,10 @@ PyTypeObject _PyManagedBuffer_Type = {
     PyObject_GenericGetAttr,                 /* tp_getattro */
     0,                                       /* tp_setattro */
     0,                                       /* tp_as_buffer */
-    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */
+    Py_TPFLAGS_DEFAULT,                      /* tp_flags */
     0,                                       /* tp_doc */
-    (traverseproc)mbuf_traverse,             /* tp_traverse */
-    (inquiry)mbuf_clear                      /* tp_clear */
+    0,                                       /* tp_traverse */
+    0                                        /* tp_clear */
 };
 
 
@@ -1066,13 +1049,15 @@ memory_dealloc(PyMemoryViewObject *self)
 static int
 memory_traverse(PyMemoryViewObject *self, visitproc visit, void *arg)
 {
-    Py_VISIT(self->mbuf);
+    Py_VISIT(self->mbuf->master.obj);
     return 0;
 }
 
 static int
 memory_clear(PyMemoryViewObject *self)
 {
+    if (self->exports != 0)
+        return 0;
     (void)_memory_release(self);
     Py_CLEAR(self->mbuf);
     return 0;