[Bug c++/91678] [9 Regression] decltype returns wrong type under certain conditions

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91678

--- Comment #12 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
It depends on r10-3735-gcb57504a550158913258e5be8ddb991376475efb :/

So, we'd have to play some games with unwrapping the NON_LVALUE_EXPR.