Dozens of “profiling:invalid arc tag” when running code coverage in Xcode 5

Question

When running my Test target with code coverage enabled in Xcode 5, I get dozens of the following message in the build output:

profiling:invalid arc tag (0x..         


        

Answer 1

I'm having the same issue. In my appDelegate under applicationWillTerminate: I have the __gcov_flush();. Commenting this out removes the invalid arc tag messages in my build output.

I'm doing further research to figure out why this happens. I know that if I completely clean my project and delete the DerivedData directory these messages will stop for a few runs of my tests.

EDIT: I seemed to have fixed this for me. In my appDelegate I had the following:

#ifdef DEBUG
+ (void)initialize {
    [[NSUserDefaults standardUserDefaults] setValue:@"XCTestLog,GcovTestObserver"
                                         forKey:@"XCTestObserverClass"];
    [super initialize];
}
#endif

I spelled GcovTestObserver wrong, and after fixing this the messages stopped. Make sure you also have a subclass of XCTestObserver in your Test target overriding stopObserving with the following:

- (void) stopObserving
{
    [super stopObserving];
    UIApplication* application = [UIApplication sharedApplication];
    [application.delegate applicationWillTerminate:application];
}