Lldb 调试app出现错误提示:type 'long' is not 'id' or interface pointer, consider casting it to 'id'

利用lldb调试程序,使用
ivars xxxx提示
error: warning: receiver type ‘long’ is not ‘id’ or interface pointer, consider casting it to ‘id’
error: Can’t run the expression locally: Interpreter doesn’t handle one of the expression’s opcodes
还有正常情况下使用po/x (char *)$x0查看一个变量应该显示@“aggp”,但是现在只显示"\xffffff88\xffffffffd \x02"。是什么权限没设置对么?
使用命令:po [$x0 class] ,也一样的错误提示
error: warning: receiver type ‘unsigned long’ is not ‘id’ or interface pointer, consider casting it to ‘id’
error: Can’t run the expression locally: Interpreter doesn’t handle one of the expression’s opcodes

问题原因不明,启动后比较晚点下对系统函数下中断之后一切恢复正常。