Command failed due to signal: Abort trap: 6

Question

Since Xcode 7 and Swift 2.0, I get the error above, like in the screenshot shown here:

Answer 1

I got this error too on XCode 7 Beta 5. After I clean the build, then I got another error saying one of my class not conforming to the protocol I just changed. After I fix the issue, it builds. The protocol changes I made is to change two parameter type of a method from Int to Int32