[Bug c++/85254] boost::is_final does not work for template types

[andysem at mail dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85254

--- Comment #1 from andysem at mail dot ru ---
Created attachment 43869
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43869&action=edit
Compilable test case