[Bug c++/70413] Class template names in anonymous namespaces are not globally unique

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70413

--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
This gets wrongly set here:

decl2.c:

2912   else if (DECL_TEMPLOID_INSTANTIATION (decl))                             
2913     {                                                                      
2914       /* DECL is an implicit instantiation of a function or static         
2915          data member.  */                                                  
2916       if ((flag_implicit_templates                                         
2917            && !flag_use_repository)                                        
2918           || (flag_implicit_inline_templates                               
2919               && TREE_CODE (decl) == FUNCTION_DECL                         
2920               && DECL_DECLARED_INLINE_P (decl)))                           
2921         comdat_p = true;                                                   
2922       else 

But for instantiations with types defined in anon namespace this is wrong
and  "TREE_PUBLIC (decl) = 0" should be used instead.