Trying to, f.ex., build quickbook on master fails with an error like
./boost/range/concepts.hpp: In destructor 'boost::range_detail::SinglePassIteratorConcept<Iterator>::~SinglePassIteratorConcept()': ./boost/range/concepts.hpp:167:55: error: 'iterator_traits' in namespace 'boost::detail' does not name a type
That's because boost/iterator/iterator_concepts.hpp used to include boost/detail/iterator.hpp, and no longer does since this commit:
https://github.com/boostorg/iterator/commit/0107df44ab3ab41c46b616c9c37c30f3...
This apparently works on develop, which means that it's probably fixed in Range's develop branch, but the changes aren't in master.
This commit fixed it in develop, but has never been merged to master: https://github.com/boostorg/range/commit/78a8f5bf3d6fccc4038a86884c9c56dbc0e...