[Bug c++/59173] [12/13/14/15 Regression] Alias template in partial specialization finds name from primary template

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59173

--- Comment #12 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note the libstdc++ patch is still needed there because clang does not implement
the defect report.