{"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"if"}]}
        if !DeepRejectCtxt::relate_rigid_infer(ecx.cx())
        let impl_trait_ref = cx.impl_trait_ref(impl_def_id);
            .args_may_unify(goal.predicate.trait_ref.args, impl_trait_ref.skip_binder().args)