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.
oldState !== current.memoizedState
        ) {
          workInProgress.effectTag |= Update;
        }
      }
      return false;
    }
    const shouldUpdate = checkShouldComponentUpdate(
      workInProgress,
      oldProps,
      newProps,
      oldState,
      newState,
      newContext,
    );
    if (shouldUpdate) {
      if (typeof instance.componentWillUpdate === 'function') {
        startPhaseTimer(workInProgress, 'componentWillUpdate');
        instance.componentWillUpdate(newProps, newState, newContext);
        stopPhaseTimer();
        
        if (debugRenderPhaseSideEffects) {
          instance.componentWillUpdate(newProps, newState, newContext);
        }
      }
      if (typeof instance.componentDidUpdate === 'function') {
        workInProgress.effectTag |= Update;
      }
    } else {