Open Radar

 
Summary:
Xcode 7 Beta 4: Interface Builder crashes if the root view has `translatesAutoresizingMaskIntoConstraints="NO"` property. It does not crash when there is no `translatesAutoresizingMaskIntoConstraints` property in the root level `view` tag.

Steps to Reproduce:
In Xcode 7 Beta 4, open `View1.xib` (which has translatesAutoresizingMaskIntoConstraints="NO” in its root level view tag) in the attached project.

Bonus - Steps to generate such xib file using Xcode 6.4:
1. In a storyboard scene, create a fully constrained view
2. Select the view and copy it to clipboard
3. Create a new xib file, delete all existing views, and paste the view.
4. Examine the xib file using a file editor and verify that `translatesAutoresizingMaskIntoConstraints=“NO”` is in the root level view tag.
5. Save and open this xib file in Xcode 7 Beta 4. Xcode will crash.

If you try the above steps in Xcode 7 Beta 4, it will crash after step 3.

Expected Results:
Xcode/ibtool should not crash

Actual Results:
But totally does

Regression:
Not happening in Xcode 6.4 or Xcode 7 beta 3

Notes:
Workaround: manually remove `translatesAutoresizingMaskIntoConstraints=“NO”` in the root level view tag from the xib file.
Project can also be downloaded from here: https://www.dropbox.com/s/cpl15wwpcoo8jxu/IBCrasher.zip?dl=0