Unity 5 iOS build crashes in xCode at "ldrb" with "Thread 1: ECX_BAD_ACCESS (code=1, address=0x24)"

Hi
I have been searching on this error but the only thing I could find were people who had a null reference exception in their project.
I made sure that there is none in my project.
When I execute it in Unity there is absolutely no output to the console and no errors.
The Project runs just fine on Windows, Mac and Android but I cannot build it on any iPhone or iPad.
The project is really nothing complicated and I have no idea what could cause this.

Any help or hint is highly appreciated. Thanks.

Okay after lots of testing and building again and again I found out that somehow the project folder was corrupted apparently. This solved the issue:

A) I created an empty GameObject in every scene and parented every object to it
B) I created a prefab from each of those objects
C) I selected each scene and exported them with all dependencies (which they actually needed) into a Unity package
D) On a MAC I created a new project and imported the scenes and all their dependencies again by importing the created Unity package.
E) After checking all settings were the same and adjusting what needed to be I exported another XCode project again

This time XCode read and build the project with no errors and executed the app correctly without stopping at that same line again.

Hope this helps others too… If someone from Unity should see this maybe they could look into what caused this to prevent it in the future? As I said the Android build as well as the Windows and MAC build all worked fine, only the iOS build failed due to XCode hanging itself up on that one line.