[Bug c++/116379] [12/13/14 Regression] Type deduction error on decltype(auto) of parenthesized non-static data member since r12-5778

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116379

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
This looks safe enough to backport?