[Bug c++/64194] [C++14] for function template with auto return

[jason at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64194

--- Comment #16 from Jason Merrill <jason at gcc dot gnu.org> ---
The fix looks safe to backport; it isn't a regression, but the number of
duplicate reports argue for making an exception.