[Bug c++/90291] [8/9/10 Regression] Inline namespace erroneously extends another namespace

[nathan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90291

--- Comment #11 from Nathan Sidwell <nathan at gcc dot gnu.org> ---
thanks for your input.  Richard Smith (Clang maintainer) & I are going to take
this question to the evolution group.  DR2061 is intended to fix a problem with
the original intent of inline namespaces.  However, you show an interesting
different use case that conflicts.