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.
case HostPortal:
      popHostContainer(workInProgress);
      updateHostContainer(workInProgress);
      break;
    case ContextProvider:
      
      popProvider(workInProgress);
      break;
    case ContextConsumer:
      break;
    
    case IndeterminateComponent:
      invariant(
        false,
        'An indeterminate component should have become determinate before ' +
          'completing. This error is likely caused by a bug in React. Please ' +
          'file an issue.',
      );
    
    default:
      invariant(
        false,
        'Unknown unit of work tag. This error is likely caused by a bug in ' +
          'React. Please file an issue.',
      );
  }
  return null;
}
export {completeWork};