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

[igusarov at mail dot ru]

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

--- Comment #12 from Igor A. Goussarov <igusarov at mail dot ru> ---
Thank you for taking interest and for the efforts, Nathan!