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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

Successful build of WeakReference, reference main (eb186e), with Swift 6.0 for Linux on 30 Mar 2025 18:02:01 UTC.

Swift 6 data race errors: 0

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.60.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/vsanthanam/WeakReference.git
Reference: main
Initialized empty Git repository in /host/spi-builder-workspace/.git/
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint:
hint: 	git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint:
hint: 	git branch -m <name>
From https://github.com/vsanthanam/WeakReference
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at eb186ec Update README.md
Cloned https://github.com/vsanthanam/WeakReference.git
Revision (git rev-parse @):
eb186ecc189db048bf5697a1eee59ba748f1c22f
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/vsanthanam/WeakReference.git at main
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.0
Building package at path:  $PWD
https://github.com/vsanthanam/WeakReference.git
https://github.com/vsanthanam/WeakReference.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "swift-docc-plugin",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.4.3",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/swiftlang/swift-docc-plugin.git"
    }
  ],
  "manifest_display_name" : "WeakReference",
  "name" : "WeakReference",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "12.0"
    },
    {
      "name" : "macos",
      "version" : "10.14"
    },
    {
      "name" : "maccatalyst",
      "version" : "13.0"
    },
    {
      "name" : "tvos",
      "version" : "12.0"
    },
    {
      "name" : "watchos",
      "version" : "5.0"
    },
    {
      "name" : "visionos",
      "version" : "1.0"
    }
  ],
  "products" : [
    {
      "name" : "WeakReference",
      "targets" : [
        "WeakReference"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "WeakReferenceTests",
      "module_type" : "SwiftTarget",
      "name" : "WeakReferenceTests",
      "path" : "Tests/WeakReferenceTests",
      "sources" : [
        "WeakReferenceTests.swift"
      ],
      "target_dependencies" : [
        "WeakReference"
      ],
      "type" : "test"
    },
    {
      "c99name" : "WeakReference",
      "module_type" : "SwiftTarget",
      "name" : "WeakReference",
      "path" : "Sources/WeakReference",
      "product_memberships" : [
        "WeakReference"
      ],
      "sources" : [
        "WeakReference.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats 2>&1
basic-6.0-latest: Pulling from finestructure/spi-images
Digest: sha256:081dcf4fb829aea9d08447f4790431afbdfbcc335bfeed728ca69c6f181ae2aa
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.0-latest
Fetching https://github.com/swiftlang/swift-docc-plugin.git
[1/2050] Fetching swift-docc-plugin
Fetched https://github.com/swiftlang/swift-docc-plugin.git from cache (0.86s)
Computing version for https://github.com/swiftlang/swift-docc-plugin.git
Computed https://github.com/swiftlang/swift-docc-plugin.git at 1.4.3 (2.39s)
Fetching https://github.com/swiftlang/swift-docc-symbolkit
[1/3349] Fetching swift-docc-symbolkit
Fetched https://github.com/swiftlang/swift-docc-symbolkit from cache (0.39s)
Computing version for https://github.com/swiftlang/swift-docc-symbolkit
Computed https://github.com/swiftlang/swift-docc-symbolkit at 1.0.0 (0.69s)
Creating working copy for https://github.com/swiftlang/swift-docc-symbolkit
Working copy of https://github.com/swiftlang/swift-docc-symbolkit resolved at 1.0.0
Creating working copy for https://github.com/swiftlang/swift-docc-plugin.git
Working copy of https://github.com/swiftlang/swift-docc-plugin.git resolved at 1.4.3
[1/1] Compiling plugin Swift-DocC
[2/2] Compiling plugin Swift-DocC Preview
Building for debugging...
[2/4] Write sources
[3/4] Write swift-version-24593BA9C3E375BF.txt
[5/6] Emitting module WeakReference
[6/6] Compiling WeakReference WeakReference.swift
Build complete! (22.54s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "swift-docc-plugin",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.4.3",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/swiftlang/swift-docc-plugin.git"
    }
  ],
  "manifest_display_name" : "WeakReference",
  "name" : "WeakReference",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "12.0"
    },
    {
      "name" : "macos",
      "version" : "10.14"
    },
    {
      "name" : "maccatalyst",
      "version" : "13.0"
    },
    {
      "name" : "tvos",
      "version" : "12.0"
    },
    {
      "name" : "watchos",
      "version" : "5.0"
    },
    {
      "name" : "visionos",
      "version" : "1.0"
    }
  ],
  "products" : [
    {
      "name" : "WeakReference",
      "targets" : [
        "WeakReference"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "WeakReferenceTests",
      "module_type" : "SwiftTarget",
      "name" : "WeakReferenceTests",
      "path" : "Tests/WeakReferenceTests",
      "sources" : [
        "WeakReferenceTests.swift"
      ],
      "target_dependencies" : [
        "WeakReference"
      ],
      "type" : "test"
    },
    {
      "c99name" : "WeakReference",
      "module_type" : "SwiftTarget",
      "name" : "WeakReference",
      "path" : "Sources/WeakReference",
      "product_memberships" : [
        "WeakReference"
      ],
      "sources" : [
        "WeakReference.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.0"
}
basic-6.0-latest: Pulling from finestructure/spi-images
Digest: sha256:081dcf4fb829aea9d08447f4790431afbdfbcc335bfeed728ca69c6f181ae2aa
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.0-latest
Done.