xcode 9 crash when open storyboard

Question

XCode 9 GM Candidate 1 is currently crashing when opening a storyboard.

ProductBuildVersion: 9A235

UNCAUGHT EXCEPTION (NSInternalInconsistencyExcepti         


        

Answer 1

The issue is a nil key tag (at least for my case)

or more generally

That has its counterpart

or more generally

< key="generic_name"/>

Removing all of them solves the issue.

1. Open the storyboard as Source Code
2. Search and remove: or any (replace with your particular tag name)
3. Search and remove their counter part: or any << generic_name > key="generic_name"/> (replace with your particular tag name)
4. Save and open your storyboard normally
5. Enjoy

EDIT:

This tags seems to be related and are in the Storyboard Source Code of UITabBarControllers however their counterparts are scattered around UIViewControllers connected to the UITabBarController. Can be one, two or more levels below.