https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91263
François Dumont <fdumont at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED Last reconfirmed| |2020-01-06 CC| |fdumont at gcc dot gnu.org Assignee|unassigned at gcc dot gnu.org |fdumont at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #1 from François Dumont <fdumont at gcc dot gnu.org> --- I confirm. I even wonder if there is not a Standard conformity issue here as keys are supported to be compared using the container provided predicate, the key type do not necessarily have a == operator.