[Bug libstdc++/59603] std::random_shuffle tries to swap element with itself

[joerg.richter@pdv-fs.de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59603

--- Comment #4 from Jörg Richter <joerg.richter@pdv-fs.de> ---
Are you sure that this is not a iter_swap problem? I have found nothing in the
standard that iter_swap( x, x ) is undefined.

I always thought types do not have to be prepared to handle self move
assignment.