Follow up from https://github.com/facebook/react/pull/11616.

Here's one I found. These two invariants:

https://github.com/facebook/react/blob/7e7127387ba64f57299eaff8656542cea6fb3a2d/packages/react-reconciler/src/ReactFiberClassComponent.js#L330-L343

are in a function that's behind a DEV block:

https://github.com/facebook/react/blob/7e7127387ba64f57299eaff8656542cea6fb3a2d/packages/react-reconciler/src/ReactFiberClassComponent.js#L447-L449

I don't think this is intentional, but need to verify.

There may be more. I'll use this issue to track while https://github.com/facebook/react/pull/11616 preserves existing behavior.
if (typeof instance.componentDidUpdate === 'function') {
        if (
          oldProps !== current.memoizedProps ||
          oldState !== current.memoizedState
        ) {
          workInProgress.effectTag |= Update;
        }
      }
      
      
      memoizeProps(workInProgress, newProps);
      memoizeState(workInProgress, newState);
    }
    
    
    instance.props = newProps;
    instance.state = newState;
    instance.context = newContext;
    return shouldUpdate;
  }
  return {
    adoptClassInstance,
    constructClassInstance,
    mountClassInstance,
    
    updateClassInstance,
  };
}