[] dtorck_constraint: rustc_middle::traits::query::DropckConstraint<'tcx>,
[] candidate_step: rustc_middle::traits::query::CandidateStep<'tcx>,
[] autoderef_bad_ty: rustc_middle::traits::query::MethodAutoderefBadTy<'tcx>,
+ [] query_region_constraints: rustc_middle::infer::canonical::QueryRegionConstraints<'tcx>,
[] type_op_subtype:
rustc_middle::infer::canonical::Canonical<'tcx,
rustc_middle::infer::canonical::QueryResponse<'tcx, ()>