As an alternative you can set a timer at an interval, say .25 sec and check the buffer for activity, eg new chars, if > 1 sec it’s usually a pause, so you can put a ‘.’ ‘/n’ and wait for next input and begin concatenation Its a bit manual but removes any reliance on Apple fixing the bug

Ok... The issue was I had the following as my config, and hadn't replaced the products.library with products.executable Incorrect Config import PackageDescription let package = Package(     name: "MyServer",     products: [         // Products define the executables and libraries a package produces, and make them visible to other packages.         .library(             name: "MyServer",             targets: ["MyServer"]),     ],     dependencies: [         // Dependencies declare other packages that this package depends on.         // .package(url: /* package url */, from: "1.0.0"),         .package(url: "https://github.com/vapor/vapor.git", from: "4.0.0"),     ],     targets: [         // Targets are the basic building blocks of a package. A target can define a module or a test suite.         // Targets can depend on other targets in this package, and on products in packages this package depends on.         .target(             name: "MyServer",             dependencies: [dependencies: [                 .product(name: "Vapor", package: "vapor")             ]),]),         .testTarget(             name: "MyServerTests",             dependencies: ["MyLibrary1"]),     ] ) The Correct Config is shown here but is the same as that in the WWDC Session import PackageDescription let package = Package( name: "MyServer", platforms: [.macOS("12.0")], products: [ .executable( name: "MyServer", targets: ["MyServer"]), ], dependencies: [ .package(url: "https://github.com/vapor/vapor.git", .upToNextMajor(from: "4.0.0")), ], targets: [ .executableTarget( name: "MyServer", dependencies: [ .product(name: "Vapor", package: "vapor") ]), .testTarget( name: "MyServerTests", dependencies: ["MyServer"]), ] ) Resolved Issue