Helpful error message for error case 'Storyboard without Initial View Controller'

Originator:ralf.ebert
Number:rdar://21702555 Date Originated:07-Jul-2015 02:49 PM
Status:Open Resolved:
Product:Developer Tools Product Version:Xcode-beta (7A121l)
Classification:Other Bug Reproducible:Always
 
Steps to Reproduce:
1. Open Xcode and create a new iOS Single View Application
2. In the storyboard, disable the option 'Is Initial View Controller' for the view controller
3. Run the application

Expected Results:
An error with a descriptive error message like 'Tried to load a storyboard without a initial view controller'

Actual Results:
An error that is not helpful for beginners of UIKit programming: "'Invalid parameter not satisfying: nibNameMap != nil'"

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