When use blockCopy, flags cannot get a right value, because PyArg_ParseTuple want to get 6 parameters and blockCopy only pass 5.Flags will get a unpredictable value, this will make this function cannot be used.And error just like: unsupported flags (0x7f6c) in function qemuDomainBlockCopy Signed-off-by: Luyao Huang <lhuang(a)redhat.com&gt; --- libvirt-override.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/libvirt-override.c b/libvirt-override.c index c887b71..4999ac3 100644 --- a/libvirt-override.c +++ b/libvirt-override.c @@ -8175,8 +8175,7 @@ libvirt_virDomainBlockCopy(PyObject *self ATTRIBUTE_UNUSED, PyObject *args) int c_retval; if (!PyArg_ParseTuple(args, (char *) "Ozz|Oi:virDomainBlockCopy", - &pyobj_dom, &disk, &destxml, &pyobj_dict, &params, - &flags)) + &pyobj_dom, &disk, &destxml, &pyobj_dict, &flags)) return VIR_PY_INT_FAIL; if (PyDict_Check(pyobj_dict)) {