[Bug c++/37804] friend declaration leaks into global scope at template instantiation

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37804
Bug 37804 depends on bug 31336, which changed state.

Bug 31336 Summary: template friends and Koenig lookup
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=31336

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |DUPLICATE