[boost] range/concepts.hpp broken on master

Subject: [boost] range/concepts.hpp broken on master
From: Peter Dimov (lists_at_[hidden])
Date: 2017-09-08 17:35:35

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/0107df44ab3ab41c46b616c9c37c30f324a4bc7f#diff-b60c63d618026c08e05a71db9f883adb

This apparently works on develop, which means that it's probably fixed in 
Range's develop branch, but the changes aren't in master.