{"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"debug_assert_eq!(env_canonicalizer.binder_index,"}]}
            debug_assert_eq!(env_canonicalizer.binder_index, ty::INNERMOST);
            let param_env = param_env.fold_with(&mut env_canonicalizer);
            (param_env, env_canonicalizer.variable_lookup_table, env_canonicalizer.var_kinds)