[Bug c++/59256] qualified name in friend function declaration doesn't match previous declaration in inline namespace

[ge...@schorsch-tech.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59256

ge...@schorsch-tech.de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ge...@schorsch-tech.de

--- Comment #5 from ge...@schorsch-tech.de ---
Created attachment 35665
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35665&action=edit
tried backport of 217461 to 4.9.2