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I am building with Xamarin.iOS 8 from the beta channel. When I try to run my app in Debug/Simulator 7.1, it crashes immediately with exit code 5. When I run with Release/Sim 7.1, it prints this error:
dyld: Symbol not found: __dealloc
Referenced from: /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
Expected in: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.1.sdk/usr/lib/libobjc.A.dylib
I found a similar problem here:
The solution, which was to set iOS Build > Linker behavior to "Link SDK Assemblies Only" worked.
Some new frameworks in iOS8 are causing side effects with OSX. Enabling the linker allows XI to remove the reference to (unused) frameworks so it can work around the issue (as long as there's no reference to the new frameworks).
*** This bug has been marked as a duplicate of bug 22750 ***