Xcode beta 6 errors
Yes! I too was completely confused by these errors.
Then I remembered to delete the "DerivedData" for the project (or as I did, the entire folder), found here:
~/Library/Developer/Xcode/DerivedData
(with thanks to @drmarvelous)
Had the same strange errors after upgrading to xcode 6 beta 6. For me the problem got fixed with a Product -> Clean. And if that does not fix the errors hold down option key and click again on Product in the Menubar then you will see in the dropdown menu Clean Build Folder... click on that.
I had the same problem, but deleting the "DerivedData" folder alone didn't work for me. I had to change the Build Location to "Unique" in the advanced section of Locations. I believe that this might be because I had to quarantine xcode to get it open using the command:
sudo xattr -dr com.apple.quarantine /Applications/Xcode6-Beta6.appBut I'm not sure about that.