https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68061
--- Comment #1 from Christian Butcher <chrisb2244 at gmail dot com> --- Created attachment 36565 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36565&action=edit Short compilable (or not) case showing problem Commenting out the function definition for 'foo' allows compilation using g++ -std=c++1z reqClauseDep.cpp -o Test
