swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)a!swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)a!swift-DEVELOPMENT-SNAPSHOT-2018-04-18-a Swift version 4.2-dev (LLVM d14a2b25f2, Clang da1edea3f7, Swift ac061632b2)