std::set_difference(
m_pids_active.begin(), m_pids_active.end(),
pids_to_record.begin(), pids_to_record.end(),
- std::inserter(new_pids, new_pids.begin())
+ std::inserter(obsolete_pids, obsolete_pids.begin())
);
for (std::set<int>::iterator i(new_pids.begin()); i != new_pids.end(); ++i)