https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92458
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |FIXED --- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Should be fixed now. I believe GCC 9 cp/constraints.cc doesn't have this tree_cache_map.