Memory leak caused by componentWillUnmount

[harriethorobinworley]

We're running a React 16.12 app, using the autocomplete within a form, and seeing the following warning:

Warning: Can't perform a React state update on an unmounted component. This is a no-op, but it indicates a memory leak in your application. To fix, cancel all subscriptions and asynchronous tasks in the componentWillUnmount method

It looks like this is caused by

componentWillUnmount () { clearTimeout(this.$pollInput) }

in autocomplete.js or status.js

It looks like this can be fixed by adding a _isMounted boolean -https://stackoverflow.com/questions/52061476/cancel-all-subscriptions-and-asyncs-in-the-componentwillunmount-method-how or by using cancelable callbacks?