[Bug libstdc++/100290] join_view::_Iterator::operator++ copies _M_parent->_M_inner when _S_ref_is_glvalue is false

[hpwxf at haveneer dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100290

--- Comment #1 from Pascal HAVÉ <hpwxf at haveneer dot com> ---
Created attachment 50688
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50688&action=edit
Minimal reproducer with an assertion

Minimal reproducer to show the abnormal behavior.

The assertion 
  assert(std::ranges::next(v.begin()) == v.end());
and fails and should be OK.

Any range-based for loop on it will go to an infinite loop.