I started getting this strange message when compiling for my iPhone:

ldr 12-bit displacement out of range

Eventually I found that quitting Xcode, deleting the build folder in the project then reopening Xcode and re-building made everything work again.

Just putting here in case anyone else has similar issues!

UPDATE: Anyone else with this problem, please file a bug report with Apple (http://bugreport.apple.com/) because if lots of people file a bug then hopefully they’ll do something about it.