id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
13357	boost::iterator_range<boost::counting_iterator<uint64_t>>::back() returns reference to temporary	Mikołaj Milej <mmilej@…>	Neil Groves	"boost::iterator_range<boost::counting_iterator<uint64_t>>::back() returns reference to temporary

it's created by

{{{
using RangeRawType = std::uint64_t;

inline Range makeRange(
    RangeRawType begin,
    RangeRawType end = std::numeric_limits<RangeRawType>::max())
{
    return boost::counting_range<RangeRawType>(begin, end);
}
}}}

After investigation code of back() it probably returns reference to temporary value:

{{{
    reference back() const
    {
        BOOST_ASSERT(!this->empty());
        return *boost::prior(this->m_End);
    }
}}}

So it returns just a junk (or rather this reference points to some random data).

Code is the same in the newest boost (1.66 at time of writing).
"	Bugs	new	To Be Determined	range	Boost 1.61.0	Problem		range