[Bug c++/97890] Abstract virtual classes suddenly allowed as parameter types ?

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97890

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The commit log refers to
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0929r2.html which was
accepted as a defect report (i.e. a fix for previous standards) in Rapperswil
2018.