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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 1.0.0-beta1 (ebe76d), with Swift 6.1 for macOS (SPM) on 24 Apr 2025 16:56:40 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/openkitten/lynx.git
Reference: 1.0.0-beta1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/openkitten/lynx
 * tag               1.0.0-beta1 -> FETCH_HEAD
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 1.0.0-beta1
Fetching https://github.com/OpenKitten/KittenCTLS.git
Fetching https://github.com/OpenKitten/CryptoKitten.git
[1/37] Fetching kittenctls
[4/664] Fetching kittenctls, cryptokitten
Fetched https://github.com/OpenKitten/KittenCTLS.git from cache (0.79s)
Fetched https://github.com/OpenKitten/CryptoKitten.git from cache (0.79s)
Computing version for https://github.com/OpenKitten/KittenCTLS.git
error: 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
========================================
Selected platform:         macosSpm
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"
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures
Updating https://github.com/OpenKitten/CryptoKitten.git
Updating https://github.com/OpenKitten/KittenCTLS.git
Updated https://github.com/OpenKitten/CryptoKitten.git (0.44s)
Updated https://github.com/OpenKitten/KittenCTLS.git (0.44s)
Computing version for https://github.com/OpenKitten/KittenCTLS.git
error: 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.
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64
Updating https://github.com/OpenKitten/CryptoKitten.git
Updating https://github.com/OpenKitten/KittenCTLS.git
Updated https://github.com/OpenKitten/CryptoKitten.git (0.43s)
Updated https://github.com/OpenKitten/KittenCTLS.git (0.43s)
Computing version for https://github.com/OpenKitten/KittenCTLS.git
error: 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 macosSpm