[Bug c++/100629] Regression from 10 symbol mismatch between class definition and use with/without optimization

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100629

--- Comment #27 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 50831
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50831&action=edit
further reduced