https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93880
Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mpolacek at gcc dot gnu.org --- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> --- spaceship-rewrite3.C is a test where this triggers. It means: "For equality operator expressions x==y and x!=y, a synthesized candidate with the order of the two parameters reversed is added for each member, non-member, and built-in operator=='s found."