[Bug c++/86588] peculiar build issue using range-v3

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86588

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |needs-reduction
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2019-10-15
     Ever confirmed|0                           |1

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Still ICEs on current trunk with -std=gnu++17 -fconcepts

I haven't confirmed whether the code is valid, nor tried to reduce it.