[Bug] Upload.Dragger called setState() when it was unmounted and got a React Warning

[mdluo]

Environment

• antd version: 2.7.4

What did you do? Please provide steps to re-produce your problem.

Unmounted the Upload.Dragger component when a customRequest event was triggered

What happen?

Warning: setState(...): Can only update a mounted or mounting component. This usually means you called setState() on an unmounted component. This is a no-op. Please check the code for the Upload component.

Where the problem is

https://github.com/ant-design/ant-design/blob/master/components/upload/index.tsx#L217

Possible solution

https://facebook.github.io/react/blog/2015/12/16/ismounted-antipattern.html

[lock]

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