Extracted from https://github.com/facebook/react/issues/12643.

We're currently diff a host node in the complete phase even if it has bailed out in the begin phase. By itself, this just means we're doing a little bit more work than necessary. But it also has some observable effects. In particular, https://github.com/facebook/react/issues/13424 (which by itself would be very rare and probably not worth fixing) is made worse because we end up committing update to inputs from another component.

I have a fix for this in https://github.com/facebook/react/pull/13423. Filing this for posterity.
throw new Error('Error in host config.');
      }
      return (
        typeof props.children === 'string' || typeof props.children === 'number'
      );
    },
    shouldDeprioritizeSubtree(type: string, props: Props): boolean {
      return !!props.hidden;
    },
    createTextInstance(
      text: string,
      rootContainerInstance: Container,
      hostContext: Object,
      internalInstanceHandle: Object,
    ): TextInstance {
      const inst = {text: text, id: instanceCounter++};
      
      Object.defineProperty(inst, 'id', {value: inst.id, enumerable: false});
      return inst;
    },
    scheduleDeferredCallback(callback) {
      if (scheduledCallback) {
        throw new Error(
          'Scheduling a callback twice is excessive. Instead, keep track of ' +