On 24 April 2017 at 20:04, Robert Jones via Boost-users <boost-users@lists.boost.org> wrote:

Michel Morin was long ago kind enough to diagnose this problem as being due to https://svn.boost.org/trac/boost/ticket/2640
which is about whether iterators may and should own their referents, but my trac-foo is not quite up to being certain
whether this was ever fixed or indeed could or should be fixed.

I'd appreciate a quick sentence confirming the current situation.

I don't think it's been fixed in range v2.

New efforts for ranges have mostly been happening in range v3, which has decided to be a standalone library instead of Boost. In that model, the equivalent of counting_range (iota), has iterators whose operator* return by value.