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Track the adoption of Swift 6 strict concurrency checks for data race safety. How many packages are Ready for Swift 6?

Build Information

Failed to build Lynx, reference master (ebe76d), with Swift 6.1 for macOS (Xcode) using Xcode 16.3 on 24 Apr 2025 16:53:17 UTC.

Build Command

No build command. This typically means the build failed at an early stage where we determine the build command.

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/openkitten/lynx.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/openkitten/lynx
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at ebe76d0 Fixed specific cookie parsing
Cloned https://github.com/openkitten/lynx.git
Revision (git rev-parse @):
ebe76d0747763ff0ae49d546a0e507d70e3623cf
SUCCESS checkout https://github.com/openkitten/lynx.git at master
========================================
Build
========================================
Selected platform:         macosXcodebuild
Swift version:             6.1
Building package at path:  $PWD
https://github.com/openkitten/lynx.git
https://github.com/openkitten/lynx.git
{
  "dependencies" : [
    {
      "identity" : "cryptokitten",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "0.2.0",
            "upper_bound" : "1.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/OpenKitten/CryptoKitten.git"
    },
    {
      "identity" : "kittenctls",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/OpenKitten/KittenCTLS.git"
    }
  ],
  "manifest_display_name" : "Lynx",
  "name" : "Lynx",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Lynx",
      "targets" : [
        "Lynx"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "LynxTests",
      "module_type" : "SwiftTarget",
      "name" : "LynxTests",
      "path" : "Tests/LynxTests",
      "sources" : [
        "PathTests.swift"
      ],
      "target_dependencies" : [
        "Lynx"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Lynx",
      "module_type" : "SwiftTarget",
      "name" : "Lynx",
      "path" : "Sources/Lynx",
      "product_dependencies" : [
        "CryptoKitten"
      ],
      "product_memberships" : [
        "Lynx"
      ],
      "sources" : [
        "HTTP/HTTPParser.swift",
        "HTTP/HTTPServer.swift",
        "Helpers/Base64.swift",
        "Helpers/Error.swift",
        "Helpers/UTF8String.swift",
        "Message/Cookie.swift",
        "Message/Headers.swift",
        "Request/Multipart.swift",
        "Request/Path.swift",
        "Request/Query.swift",
        "Request/Request.swift",
        "Response/Body.swift",
        "Response/NotFound.swift",
        "Response/Response.swift",
        "Response/ResponseRepresentable.swift",
        "Routing/Routing.swift",
        "Sockets/TCPClient.swift",
        "Sockets/TCPSSLClient.swift",
        "Sockets/TCPServer.swift",
        "Sockets/TCPServerClient.swift",
        "Sockets/TCPSocket.swift",
        "WebSocket/Frame.swift",
        "WebSocket/WebSocket.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Fetching from https://github.com/OpenKitten/KittenCTLS.git
Fetching from https://github.com/OpenKitten/CryptoKitten.git
Resolve Package Graph
Updating from https://github.com/OpenKitten/CryptoKitten.git
Updating from https://github.com/OpenKitten/KittenCTLS.git
Resolved source packages:
  spi-builder-workspace: (null)
2025-04-24 09:53:16.466 xcodebuild[518:2858] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2025-24-04_09-53-0016.xcresult
xcodebuild: error: Could not resolve package dependencies:
  Failed to resolve dependencies Dependencies could not be resolved because 'kittenctls' contains incompatible tools version (3.1.0) and root depends on 'kittenctls' 1.0.0..<2.0.0.
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Updating from https://github.com/OpenKitten/CryptoKitten.git
Updating from https://github.com/OpenKitten/KittenCTLS.git
Resolved source packages:
  spi-builder-workspace: (null)
2025-04-24 09:53:17.656 xcodebuild[645:3473] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2025-24-04_09-53-0017.xcresult
xcodebuild: error: Could not resolve package dependencies:
  Failed to resolve dependencies Dependencies could not be resolved because 'kittenctls' contains incompatible tools version (3.1.0) and root depends on 'kittenctls' 1.0.0..<2.0.0.
BUILD FAILURE 6.1 macosXcodebuild