{"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"if"}]}
        if !DeepRejectCtxt::relate_rigid_infer(ecx.cx()).args_may_unify(
        let impl_trait_ref = cx.impl_trait_ref(impl_def_id);
            goal.predicate.alias.trait_ref(cx).args,