Estoy tratando de anclar un UILabel a su celda principal. Agregué cuatro restricciones (arriba, adelante, atrás, abajo)que funciona bien en iOS 8.0 pero no en iOS 7.X. Por favor vea la imagen a continuación:

[Haga clic aquí para ver el tamaño completo]

¿Qué estoy haciendo mal? ¡Por favor avise!

EDITAR # 1

Parece que solo está roto desde Xcode 6 GM. Mi enfoque funcionaba bien en Xcode 6 beta 7.

Además, si disminuyo el ancho de la vista interior, arroja la siguiente advertencia:

2014-09-10 19:58:28.109 Test[57827:60b] Unable to simultaneously satisfy constraints.
    Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) 
(
    "<NSLayoutConstraint:0x799573a0 H:|-(8)-[UIView:0x798a86e0]   (Names: '|':UIView:0x798ae5d0 )>",
    "<NSLayoutConstraint:0x799573d0 H:[UIView:0x798a86e0]-(43)-|   (Names: '|':UIView:0x798ae5d0 )>",
    "<NSAutoresizingMaskLayoutConstraint:0x798a8b00 h=--& v=--& H:[UIView:0x798ae5d0(50)]>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x799573d0 H:[UIView:0x798a86e0]-(43)-|   (Names: '|':UIView:0x798ae5d0 )>

Break on objc_exception_throw to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.