[Bug c++/105099] In lookup of namespace name qualifiers only namespaces should be considered

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105099

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Based on the issue submission date, Clark was probably talking about GCC 3.1 or
similar. So maybe this is a regression since the new C++ parser was introduced.