boost::iterator_range<boost::counting_iterator<uint64_t>>::back() returns reference to temporary

[Mikołaj Milej <mmilej@…>]

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).