[Bug c++/86950] internal compiler error: unexpected expression ‘void()’ of kind cast_expr

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86950

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed testcase:

template <typename T>
auto f(T) -> decltype(void(), 1) { return 1; }

int
main ()
{
  f(0);
}