{"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":"debug_assert!(!self.next_trait_solver());"}]}
        debug_assert!(!self.next_trait_solver());
    ) -> Result<Vec<Goal<'tcx, ty::Predicate<'tcx>>>, TypeError<'tcx>> {
        let process = |a: Ty<'tcx>, b: Ty<'tcx>| match *a.kind() {