Looks like there may be a mismatch in the version of libswiftCore that Result was built against and what Carthage includes. The version I installed was 0.7.3 via homebrew. Here's the error message I'm getting:
dyld: Symbol not found: __TWPSuSs21BitwiseOperationsTypeSs
Referenced from: /usr/local/Cellar/carthage/0.7.3/bin/../Frameworks/CarthageKit.framework/Versions/Current/Frameworks//Result.framework/Versions/A/Result
Expected in: /Library/Frameworks/CarthageKit.framework/Versions/Current/Frameworks/libswiftCore.dylib
in /usr/local/Cellar/carthage/0.7.3/bin/../Frameworks/CarthageKit.framework/Versions/Current/Frameworks//Result.framework/Versions/A/Result
Trace/BPT trap: 5
This can occur if you have an old version of /Library/Frameworks/CarthageKit.framework. If you're using the Homebrew version of Carthage, you don't need that copy of the framework, so it can be safely deleted.
:+1: Thanks, that solved the problem.
Most helpful comment
This can occur if you have an old version of
/Library/Frameworks/CarthageKit.framework. If you're using the Homebrew version of Carthage, you don't need that copy of the framework, so it can be safely deleted.