[Bug c++/81589] Possible False-Positive with decltype

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81589

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #2)
> Confirmed with GCC 6 and 7.  GCC 8 compiles the translation unit without an
> error.  Bisection points to r248153 as the revision that made it work.

FWIW r248153 also fixed Bug 81190 for gcc-8, and r257981 for this bug fixed
that on gcc-7-branch too.