http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51823
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-01-11 13:16:16 UTC --- (In reply to comment #0) > Consider an iterator class that implements the requirements of a > forward_iterator. We underlying datatype is always POD and the operator*() > member of the iterator returns the results by value, since it is POD anyway. The iterator requirements [iterator.iterators] say operator* must return iterator_traits<some_iterator>::reference
