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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 TLS, reference 3.0.0-rc.1.0.1 (cfd8cc), with Swift 6.1 for macOS (SPM) on 25 Apr 2025 15:23:28 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/vapor-community/tls.git
Reference: 3.0.0-rc.1.0.1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/vapor-community/tls
 * tag               3.0.0-rc.1.0.1 -> FETCH_HEAD
HEAD is now at cfd8cc0 remove extraneous print
Cloned https://github.com/vapor-community/tls.git
Revision (git rev-parse @):
cfd8cc0f06841ee15469c5fc98131e47511f8e94
SUCCESS checkout https://github.com/vapor-community/tls.git at 3.0.0-rc.1.0.1
Fetching https://github.com/vapor/core.git
Fetching https://github.com/vapor/sockets.git
Fetching https://github.com/vapor/async.git
[1/20143] Fetching core
[2/23455] Fetching core, sockets
[1396/25778] Fetching core, sockets, async
Fetched https://github.com/vapor/core.git from cache (1.35s)
Fetched https://github.com/vapor/sockets.git from cache (1.35s)
Fetched https://github.com/vapor/async.git from cache (1.36s)
Computing version for https://github.com/vapor/sockets.git
Computed https://github.com/vapor/sockets.git at 3.0.0-rc.1 (1.97s)
Computing version for https://github.com/vapor/async.git
Computed https://github.com/vapor/async.git at 1.0.0-rc.1.1 (0.57s)
Computing version for https://github.com/vapor/core.git
Computed https://github.com/vapor/core.git at 3.10.1 (0.53s)
Fetching https://github.com/apple/swift-nio.git from cache
Fetched https://github.com/apple/swift-nio.git from cache (0.98s)
Computing version for https://github.com/apple/swift-nio.git
Computed https://github.com/apple/swift-nio.git at 1.14.4 (1.56s)
Fetching https://github.com/apple/swift-nio-zlib-support.git
[1/15] Fetching swift-nio-zlib-support
Fetched https://github.com/apple/swift-nio-zlib-support.git from cache (0.52s)
Computing version for https://github.com/apple/swift-nio-zlib-support.git
Computed https://github.com/apple/swift-nio-zlib-support.git at 1.0.0 (1.07s)
Creating working copy for https://github.com/vapor/sockets.git
Working copy of https://github.com/vapor/sockets.git resolved at 3.0.0-rc.1
Creating working copy for https://github.com/vapor/async.git
Working copy of https://github.com/vapor/async.git resolved at 1.0.0-rc.1.1
Creating working copy for https://github.com/apple/swift-nio.git
Working copy of https://github.com/apple/swift-nio.git resolved at 1.14.4
Creating working copy for https://github.com/apple/swift-nio-zlib-support.git
Working copy of https://github.com/apple/swift-nio-zlib-support.git resolved at 1.0.0
Creating working copy for https://github.com/vapor/core.git
Working copy of https://github.com/vapor/core.git resolved at 3.10.1
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
Fetching https://github.com/vapor-community/tls.git
[1/1144] Fetching tls
Fetched https://github.com/vapor-community/tls.git from cache (0.81s)
Fetching https://github.com/vapor/sockets.git from cache
Fetching https://github.com/vapor/async.git from cache
Fetching https://github.com/vapor/core.git from cache
Fetched https://github.com/vapor/sockets.git from cache (0.45s)
Fetched https://github.com/vapor/async.git from cache (0.48s)
Fetched https://github.com/vapor/core.git from cache (0.48s)
Computing version for https://github.com/vapor/sockets.git
Computed https://github.com/vapor/sockets.git at 3.0.0-rc.1 (0.53s)
Computing version for https://github.com/vapor/async.git
Computed https://github.com/vapor/async.git at 1.0.0-rc.1.1 (0.03s)
Computing version for https://github.com/vapor/core.git
Computed https://github.com/vapor/core.git at 3.10.1 (0.03s)
Fetching https://github.com/apple/swift-nio.git from cache
Fetched https://github.com/apple/swift-nio.git from cache (0.72s)
Computing version for https://github.com/apple/swift-nio.git
Computed https://github.com/apple/swift-nio.git at 1.14.4 (0.77s)
Fetching https://github.com/apple/swift-nio-zlib-support.git from cache
Fetched https://github.com/apple/swift-nio-zlib-support.git from cache (0.45s)
Computing version for https://github.com/apple/swift-nio-zlib-support.git
Computed https://github.com/apple/swift-nio-zlib-support.git at 1.0.0 (0.50s)
Creating working copy for https://github.com/vapor-community/tls.git
Working copy of https://github.com/vapor-community/tls.git resolved at 3.0.0-rc.1.0.1 (cfd8cc0)
Creating working copy for https://github.com/apple/swift-nio.git
Working copy of https://github.com/apple/swift-nio.git resolved at 1.14.4
Creating working copy for https://github.com/vapor/async.git
Working copy of https://github.com/vapor/async.git resolved at 1.0.0-rc.1.1
Creating working copy for https://github.com/vapor/sockets.git
Working copy of https://github.com/vapor/sockets.git resolved at 3.0.0-rc.1
Creating working copy for https://github.com/vapor/core.git
Working copy of https://github.com/vapor/core.git resolved at 3.10.1
Creating working copy for https://github.com/apple/swift-nio-zlib-support.git
Working copy of https://github.com/apple/swift-nio-zlib-support.git resolved at 1.0.0
warning: 'swift-nio-zlib-support': ignoring declared target(s) 'swift-nio-zlib-support' in the system package
error: multiple packages ('async' (from 'https://github.com/vapor/async.git'), 'core' (from 'https://github.com/vapor/core.git')) declare products with a conflicting name: 'Async’; product names need to be unique across the package graph
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/vapor-community/tls.git
https://github.com/vapor-community/tls.git
{
  "dependencies" : [
    {
      "identity" : "async",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0-rc",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/vapor/async.git"
    },
    {
      "identity" : "core",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "3.0.0-rc",
            "upper_bound" : "4.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/vapor/core.git"
    },
    {
      "identity" : "sockets",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "3.0.0-rc",
            "upper_bound" : "4.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/vapor/sockets.git"
    }
  ],
  "manifest_display_name" : "TLS",
  "name" : "TLS",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "TLS",
      "targets" : [
        "TLS"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "AppleTLS",
      "targets" : [
        "AppleTLS"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "TLSTests",
      "module_type" : "SwiftTarget",
      "name" : "TLSTests",
      "path" : "Tests/TLSTests",
      "sources" : [
        "HTTPSTests.swift",
        "Utitilies.swift"
      ],
      "target_dependencies" : [
        "AppleTLS",
        "TLS"
      ],
      "type" : "test"
    },
    {
      "c99name" : "TLS",
      "module_type" : "SwiftTarget",
      "name" : "TLS",
      "path" : "Sources/TLS",
      "product_dependencies" : [
        "Async",
        "Bits",
        "Debugging",
        "TCP"
      ],
      "product_memberships" : [
        "TLS",
        "AppleTLS"
      ],
      "sources" : [
        "PeerValidator.swift",
        "TLSClient.swift",
        "TLSServer.swift",
        "TLSSocket.swift",
        "TLSSocketSink.swift",
        "TLSSocketSource.swift",
        "TLSSocketStream.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "AppleTLS",
      "module_type" : "SwiftTarget",
      "name" : "AppleTLS",
      "path" : "Sources/AppleTLS",
      "product_dependencies" : [
        "Async",
        "Bits",
        "Debugging"
      ],
      "product_memberships" : [
        "AppleTLS"
      ],
      "sources" : [
        "AppleTLSClient.swift",
        "AppleTLSError.swift",
        "AppleTLSServer.swift",
        "AppleTLSSocket.swift",
        "SSLContext+Certificate.swift"
      ],
      "target_dependencies" : [
        "TLS"
      ],
      "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
warning: 'swift-nio-zlib-support': ignoring declared target(s) 'swift-nio-zlib-support' in the system package
error: multiple packages ('async' (from 'https://github.com/vapor/async.git'), 'core' (from 'https://github.com/vapor/core.git')) declare products with a conflicting name: 'Async’; product names need to be unique across the package graph
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64
warning: 'swift-nio-zlib-support': ignoring declared target(s) 'swift-nio-zlib-support' in the system package
error: multiple packages ('async' (from 'https://github.com/vapor/async.git'), 'core' (from 'https://github.com/vapor/core.git')) declare products with a conflicting name: 'Async’; product names need to be unique across the package graph
BUILD FAILURE 6.1 macosSpm