{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"debug!(\"_0:"}]}
        debug!("_0: {:?} = {:?}: {:?}", ret_decl.ty, returned_local, renamed_decl.ty);
        // problem in codegen because these two types are layout-compatible, but may be unexpected.
        ret_decl.clone_from(renamed_decl);