If there is an error thrown in a child render method under provide then componentDidMount won't fire before componentWillUnmount, causing this.unsubscribe to be undefined.
When componentWillUnmount is called to unmount the partial tree this.unsubscribe is called, resulting in TypeError: this.unsubscribe is not a function at StatefulComponent.componentWillUnmount. This masks the actual error being thrown in the child render method, making it difficult to debug in development.
If there is an error thrown in a child render method under
providethencomponentDidMountwon't fire beforecomponentWillUnmount, causingthis.unsubscribeto be undefined.When
componentWillUnmountis called to unmount the partial treethis.unsubscribeis called, resulting inTypeError: this.unsubscribe is not a function at StatefulComponent.componentWillUnmount. This masks the actual error being thrown in the child render method, making it difficult to debug in development.