[Bug c++/109232] Using deduced return type in an unevaluated context leads to codegen

[ppalka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109232

--- Comment #4 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Here's another perhaps simpler version that explicitly gives begin<R> internal
linkage, which also fails to link:

namespace {
    template<class T>
    auto begin(T&& r) {
        return r.begin();
    }
}

struct R {
    int* begin();
};

static_assert(__is_same(decltype(begin(R())), int*));
int main() { }