I\'m moving part of my projects to iOS 5 / ARC. One of the oldest project (iOS 4.2, armv6 for support iPod Touch 2g) is giving to me:
dyld`dyld_fatal_error:
I had the same issue and this happens when I was running the app on my iPhone 6s, and it was working before..
Just go to Product -> Clean and re run it again...
I hope this helps.