[Bug c++/66153] Internal compiler error in nested template function

[paboyle at ph dot ed.ac.uk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66153

--- Comment #1 from Peter Boyle <paboyle at ph dot ed.ac.uk> ---
Created attachment 35547
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35547&action=edit
unprocessed source code.