This is a known bug, affecting LLDB (the Xcode debugger) as well as the REPL. It’s purely a matter of display: https://github.com/apple/llvm-project/issues/4477 https://github.com/apple/llvm-project/issues/4479 And see: Instantiated optional variable shows as nil in Xcode debugger An easy workaround for now is to pass thru the bridged Objective C type. The bug is only with the Swift … Read more
Make sure that, your project Swift Language Version is in the proper version. SwiftMessages 6.0.0 works with Swift 4.2.
You can switch back to the previous (legacy) build system from the menu by File > Workspace Settings… (or Project Settings…): This brings up a dialog where you can change the Build System to Legacy Build System: Hat tip to this answer. There’s also a video here.
Quitting the simulator and relaunching fixed this for me.
I had that problem and Xcode failed to compile on the device, but on simulator, it worked fine. I solved with these steps: Open keychain access. Lock the ‘login’ keychain. Unlock it, enter your PC account password. Clean Project in the product menu. Build it Again. And after that everything works fine.
libstdc++ was deprecated 5 years ago. Apple’s more recent platforms (tvOS and watchOS) don’t support it. Support was removed from the iOS 12.0 Simulator runtime, but it remains in the iOS 12.0 (device) runtime for binary compatibility with shipping apps. You should update your project to use libc++ rather than libstdc++ by setting the CLANG_CXX_LIBRARY … Read more
Some background: In Swift 3, additional range types were introduced, making a total of four (see for example Ole Begemann: Ranges in Swift 3): Range, ClosedRange, CountableRange, CountableClosedRange With the implementation of SE-0143 Conditional conformances in Swift 4.2, the “countable” variants are not separate types anymore, but (constrained) type aliases, for example public typealias CountableRange<Bound: … Read more
2021 Update https://developer.apple.com/download/all/?q=xcode It requires signing in with a free Apple Developer account.
Okay, seems like I managed to solve it. I was having /bin/sh script in Build Phases that was trying to build fat static library. In the script, I had OBJROOT path set like this: OBJROOT=”${OBJROOT}” Seems like Xcode 10 and new build system changed some paths on the way and this line was the source … Read more
If somebody facing similar issue with Xcode 9.1 Open directory: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport Create new folder “11.2 (15C107)” (or “10.3 (14E269)” for older versions, depends on what exactly are you missing) Paste files from provided google drive folder 11.2 (15C107) (or 10.3 (14E269) if you need older files) Restart Xcode For other iOS versions you may check … Read more