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

You might want to clear out all derived data folders. Especially if you upgrade Xcode or use more than one Xcode versions.

At one time I've experienced this just after I upgraded Xcode from 6.2 to 6.3 in our integration server and we've seen these messages in the logs as well as missing classes in the coverage report generated by frankencover.it. Removing the DerivedData folders inside the integration server fixes it.

find /Library/Developer/XcodeServer -name DerivedData -print0 | xargs -0 rm -rf