[Bug c++/60130] Sorry, unimplemented: mangling argument_pack_select

[paolo.carlini at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60130

--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
This is fixed for 5.0. I'm adding the testcase and closing the bug.