Double click on a storyboard crashes Xcode

Number:rdar://35878293 Date Originated:December 6 2017
Status:Resolved 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 9.2 (9C40b)


Please note: Reports posted here will not necessarily be seen by Apple. All problems should be submitted at before they are posted here. Please only post information for Radars that you have filed yourself, and please do not include Apple confidential information in your posts. Thank you!