Dang those broken constraints (because of the status bar!)

I keep looking this up, so here I'm putting it for posterity:

This Xcode error:

<NSLayoutConstraint:0x134682ba0 'UIInputWindowController-top' V:|-(0)-[UIInputSetContainerView:0x13468f180]   (Names: '|':UITextEffectsWindow:0x13468df70 )>"

Means:
    NOTHING! Well, actually, it means simply that the status bar is not in its normal state.

Explanation:
    In certain cases, your iPhone's status bar will be extended. For example, if you're in a call and navigate out of the main call window, a green bar representing the call will appear above the normal status bar area. Another example: if you're using the Personal Hotspot on your iPhone, a blue bar showing the connection status appears above the normal status bar area.

    If you're testing an app while this extended status bar is present, you will get the crazy NSLayoutConstraint/UIInputWindowController-top/UIInputSetContainerView/UITextEffectsWindow error message.

That's all it is, folks! Nothing to worry about at all!