Double click on a storyboard crashes Xcode

Originator:andrea.mazzini
Number:rdar://35878293 Date Originated:December 6 2017
Status:Open Resolved:
Product:Developer Tools Product Version:Version 9.2 (9C40b)
Classification: Reproducible:Yes
 
Summary: Double click on a storyboard file to open it in a new window crashes Xcode if the storyboard was not opened before.

Steps to Reproduce:
- Create a new iOS swift project
- double click on the Main.storyboard file

Expected Results:
The Main storyboard is opened in a new Xcode window

Actual Results:
Xcode crashes

Version/Build:
Version 9.2 (9C40b)

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