[Bug c++/95143] SFINAE failure with static_cast

[familiebaumanns at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95143

--- Comment #7 from Bernd Baumanns <familiebaumanns at gmail dot com> ---
I hope you have now all you need.

This bug is only triggered in C++20 mode and with inheritance.