https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93310
Jason Merrill <jason at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |FIXED Status|ASSIGNED |RESOLVED Target Milestone|--- |10.2 --- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> --- Fixed in 10.2/11. I doubt anyone is still using GCC 9 for C++20 code.