diff --git a/examples/share.lua b/examples/share.lua
index 2721d480..8bc4b497 100644
--- a/examples/share.lua
+++ b/examples/share.lua
@@ -43,7 +43,7 @@ skynet.start(function()
 	for k,v in pairs(nobj) do
 		skynet.error(string.format("nobj[%s]=%s", k,v))
 	end
-	for k,v in ipairs(nobj) do
+	for k,v in ipairs(nobj.b) do
 		skynet.error(string.format("nobj.b[%d]=%s", k,v))
 	end
 
diff --git a/lualib-src/lua-seri.c b/lualib-src/lua-seri.c
index 0db2267d..c0761bd5 100644
--- a/lualib-src/lua-seri.c
+++ b/lualib-src/lua-seri.c
@@ -266,8 +266,10 @@ wb_table_metapairs(lua_State *L, struct write_block *wb, int index, int depth) {
 		lua_copy(L, -5, -3);
 		lua_call(L, 2, 2);
 		int type = lua_type(L, -2);
-		if (type == LUA_TNIL)
+		if (type == LUA_TNIL) {
+			lua_pop(L, 4);
 			break;
+		}
 		pack_one(L, wb, -2, depth);
 		pack_one(L, wb, -1, depth);
 		lua_pop(L, 1);