执行program = program.clone() 报错 Error:`type` to initialized an Operator can not be None

[tjdster]

问题确认 Search before asking

• [X] 我已经查询历史issue，没有发现相似的bug。I have searched the issues and found no similar bug report.

Bug组件 Bug Component

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Bug描述 Describe the Bug

执行program = program.clone() 报错 Error:type to initialized an Operator can not be None

复现环境 Environment

不知道为什么调用导出接口，位置1不报错，位置2报错，接口是一样的

Bug描述确认 Bug description confirmation

• [X] 我确认已经提供了Bug复现步骤、代码改动说明、以及环境信息，确认问题是可以复现的。I confirm that the bug replication steps, code change instructions, and environment information have been provided, and the problem can be reproduced.

是否愿意提交PR？ Are you willing to submit a PR?

• [X] 我愿意提交PR！I'd like to help by submitting a PR!