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.
spyOnDev(console, 'error');
    test(React.createElement(MisspelledComponent1), 'SPAN', 'foo');
    if (__DEV__) {
      expect((<any>console.error).calls.count()).toBe(1);
      expect((<any>console.error).calls.argsFor(0)[0]).toBe(
        'Warning: ' +
        'MisspelledComponent1 has a method called componentShouldUpdate(). Did ' +
        'you mean shouldComponentUpdate()? The name is phrased as a question ' +
        'because the function is expected to return a value.'
      );
    }
  });
  it('should warn when misspelling componentWillReceiveProps', function() {
    spyOnDev(console, 'error');
    test(React.createElement(MisspelledComponent2), 'SPAN', 'foo');
    if (__DEV__) {
      expect((<any>console.error).calls.count()).toBe(1);
      expect((<any>console.error).calls.argsFor(0)[0]).toBe(
        'Warning: ' +
        'MisspelledComponent2 has a method called componentWillRecieveProps(). ' +
        'Did you mean componentWillReceiveProps()?'
      );
    }
  });
  it('should throw AND warn when trying to access classic APIs', function() {
    spyOnDev(console, 'warn');
    var instance = test(
      React.createElement(Inner, {name: 'foo'}),
      'DIV','foo'
    );