Xcode 6 GM crashes when selecting the main storyboard or a xib

Question

I just downloaded the Xcode 6 GM and every time I select the main storyboard (and a specific xib) Xcode crashes.

The error to be sent to Apple contains the following

Answer 1

Xcode 7.1 on Mac OS X 10.11.1 crashed and opening same project by right clicking the xcode icon made it crashed again. Then I right the xcode icon and opened some other project from the recent list and then opened the same project which was crashing from xcode's menu recent item and it didn't crash.