执行JavaScript数组下标出现错误

[sornian]

var obj={code:0,msg:"success",data:[{id:1000,name:"jack"},{id:1001,name:"pony"}]};
print(obj.data[0].id);

报错
E/ScriptEngine: ScriptEngine javascript TypeError: cannot read property '__g' of undefined

[sornian]

如果代码这样写就可以
var obj={code:0,msg:"success",data:[{id:1000,name:"jack"},{id:1001,name:"pony"}]};
var data=obj.data;
print(data[0].id);

[gubaojian]

后续我验证一下，看看问题在哪儿