Example fails when clicking "Modal Test": 'Pushing a navigation controller is not supported'

[mts749]

I cloned a fresh version of the repo (October 8, 2014), made no changes and ran the ActionSheetPicker example. I get the following crash if I click the "Modal Test" button:

2014-10-08 17:45:15.042 ActionSheetPicker[8950:1362181] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Pushing a navigation controller is not supported'
*** First throw call stack:
(
    0   CoreFoundation                      0x000000010be5d3f5 __exceptionPreprocess + 165
    1   libobjc.A.dylib                     0x000000010a8b5bb7 objc_exception_throw + 45
    2   UIKit                               0x000000010929b617 __71-[UINavigationController pushViewController:transition:forceImmediate:]_block_invoke + 0
    3   UIKit                               0x000000010929aca1 -[UINavigationController pushViewController:animated:] + 571
    4   UIKit                               0x00000001091469ee -[UIApplication sendAction:to:from:forEvent:] + 75
    5   UIKit                               0x000000010924cbd0 -[UIControl _sendActionsForEvents:withEvent:] + 467
    6   UIKit                               0x000000010924bf9f -[UIControl touchesEnded:withEvent:] + 522
    7   UIKit                               0x00000001094f0c30 _UIGestureRecognizerUpdate + 9487
    8   UIKit                               0x000000010918c0a6 -[UIWindow _sendGesturesForEvent:] + 1041
    9   UIKit                               0x000000010918ccd3 -[UIWindow sendEvent:] + 667
    10  UIKit                               0x0000000109159ae1 -[UIApplication sendEvent:] + 246
    11  UIKit                               0x0000000109166bad _UIApplicationHandleEventFromQueueEvent + 17370
    12  UIKit                               0x0000000109142233 _UIApplicationHandleEventQueue + 1961
    13  CoreFoundation                      0x000000010bd92ad1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
    14  CoreFoundation                      0x000000010bd8899d __CFRunLoopDoSources0 + 269
    15  CoreFoundation                      0x000000010bd87fd4 __CFRunLoopRun + 868
    16  CoreFoundation                      0x000000010bd87a06 CFRunLoopRunSpecific + 470
    17  GraphicsServices                    0x000000010bab89f0 GSEventRunModal + 161
    18  UIKit                               0x0000000109145550 UIApplicationMain + 1282
    19  ActionSheetPicker                   0x0000000109097a23 main + 115
    20  libdyld.dylib                       0x000000010fc9d145 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException

I've never used storyboards (in my apps I manage the transitions in code). Any ideas what I should do to make fix the example?

[skywinder]

It's just a typo, I try to push NavigationController. Now I changed it to modal. Thanks.