With optimizations on the Swift compiler of Xcode 7 now crashes with Illegal Instruction: 4. Apparently something is not yet implemented.Not yet implemented UNREACHABLE executed at /Library/Caches/com.apple.xbs/Sources/swiftlang/swiftlang-700.0.38.1/src/swift/lib/SILPasses/Utils/CFG.cpp:522! 0 swift 0x0000000107d93e0b llvm::sys::PrintStackTrace(__sFILE*) + 43 1 swift 0x0000000107d9454b SignalHandler(int) + 379 2 libsystem_platform.dylib 0x00007fff9110af1a _sigtramp + 26 3 libsystem_platform.dylib 0x000000000000ffff _sigtramp + 1861243135 4 swift 0x0000000107d94346 abort + 22 5 swift 0x0000000107d4de21 llvm::llvm_unreachable_internal(char const*, char const*, unsigned int) + 481 6 swift 0x000000010625b160 swift::splitEdge(swift::TermInst*, unsigned int, swift::DominanceInfo*, swift::SILLoopInfo*) + 2992 7 swift 0x000000010625b294 swift::splitEdgesFromTo(swift::SILBasicBlock*, swift::SILBasicBlock*, swift::DominanceInfo*, swift::SILLoopInfo*) + 212 8 swift 0x0000000106113dda (anonymous namespace)::Swif
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