[Bug c++/69323] [4.9/5/6 Regression] Segmentation fault when instantiating class template with inner class which declares itself as a friend

[bd at jollyrogerlabs dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69323

--- Comment #4 from Brian Davis <bd at jollyrogerlabs dot com> ---
Created attachment 37381
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37381&action=edit
Preprocessed file generated by g++ 4.9.2 on the same source file

Here's the preprocessed file used on 4.9.2; the compiler error message was
similar or exactly the same.