[Bug c/84293] system-header macro expansion location gives unexpected warning

[nathan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84293

Nathan Sidwell <nathan at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2018-02-08
           Assignee|unassigned at gcc dot gnu.org      |nathan at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #2 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
IRC conversation with shows it's not the macro expansion stuff being confused,
but the alias checking using the wrong loc