[Bug c++/80273] New: cv-qualified auto with trailing return type incorrectly accepted

[rs2740 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80273

            Bug ID: 80273
           Summary: cv-qualified auto with trailing return type
                    incorrectly accepted
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Keywords: accepts-invalid
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rs2740 at gmail dot com
  Target Milestone: ---

GCC incorrectly accepts

auto const meow() -> int;

[dcl.fct]/2 says only plain 'auto' is allowed.

Possibly related to bug 67012.