100..119 'for _ ...!() {}': fn next<IntoIterator::IntoIter<isize>>(&'? mut IntoIterator::IntoIter<isize>) -> Option<<IntoIterator::IntoIter<isize> as Iterator>::Item>
            100..119 'for _ ...!() {}': fn next<IntoIterator::IntoIter<isize>>(&'? mut IntoIterator::IntoIter<isize>) -> Option<<IntoIterator::IntoIter<isize> as Iterator>::Item>