[Bug c++/89356] [9 Regression] sorry, unimplemented: mangling implicit_conv_expr in nodejs8 package since r268321

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89356

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
A similar testcase

template<typename T> auto fn () -> decltype(unsigned{0} + T(1));
auto e = fn<int>();