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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 Skewer, reference 3.0.1 (05ade7), with Swift 6.0 for Linux on 24 Mar 2025 09:43:11 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 -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 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.60.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/jordanekay/Skewer.git
Reference: 3.0.1
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/jordanekay/Skewer
 * tag               3.0.1      -> FETCH_HEAD
HEAD is now at 05ade7f Simplify Package.swift
Cloned https://github.com/jordanekay/Skewer.git
Revision (git rev-parse @):
05ade7f6e556ce1935c62f4f7b1fa43d0e29b957
SUCCESS checkout https://github.com/jordanekay/Skewer.git at 3.0.1
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.0
Building package at path:  $PWD
https://github.com/jordanekay/Skewer.git
https://github.com/jordanekay/Skewer.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Skewer",
  "name" : "Skewer",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    }
  ],
  "products" : [
    {
      "name" : "Skewer",
      "targets" : [
        "Skewer"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SkewerTests",
      "module_type" : "SwiftTarget",
      "name" : "SkewerTests",
      "path" : "Tests/SkewerTests",
      "sources" : [
        "DecodingTests.swift",
        "EncodingTests.swift"
      ],
      "target_dependencies" : [
        "Skewer"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Skewer",
      "module_type" : "SwiftTarget",
      "name" : "Skewer",
      "path" : "Sources/Skewer",
      "product_memberships" : [
        "Skewer"
      ],
      "sources" : [
        "AnyKey.swift",
        "ComponentTransform.swift",
        "Conversion.swift",
        "Hyphen.swift",
        "KeyDecodingStrategy.swift",
        "KeyEncodingStrategy.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.3"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$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 -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 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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/9] Compiling Skewer Hyphen.swift
[4/9] Compiling Skewer KeyDecodingStrategy.swift
/host/spi-builder-workspace/Sources/Skewer/KeyDecodingStrategy.swift:19:31: warning: capture of 'conversion' with non-sendable type '(String) -> String' in a `@Sendable` closure
17 | 		.custom { keys in
18 | 			let stringValue = keys.last!.stringValue
19 | 			let convertedStringValue = conversion(stringValue)
   |                               |- warning: capture of 'conversion' with non-sendable type '(String) -> String' in a `@Sendable` closure
   |                               `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
20 | 			return AnyKey(stringValue: convertedStringValue)!
21 | 		}
[5/9] Compiling Skewer KeyEncodingStrategy.swift
/host/spi-builder-workspace/Sources/Skewer/KeyEncodingStrategy.swift:19:31: warning: capture of 'conversion' with non-sendable type '(String) -> String' in a `@Sendable` closure
17 | 		.custom { keys in
18 | 			let stringValue = keys.last!.stringValue
19 | 			let convertedStringValue = conversion(stringValue)
   |                               |- warning: capture of 'conversion' with non-sendable type '(String) -> String' in a `@Sendable` closure
   |                               `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
20 | 			return AnyKey(stringValue: convertedStringValue)!
21 | 		}
[6/9] Emitting module Skewer
[7/9] Compiling Skewer ComponentTransform.swift
[8/9] Compiling Skewer AnyKey.swift
[9/9] Compiling Skewer Conversion.swift
Build complete! (13.96s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Skewer",
  "name" : "Skewer",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    }
  ],
  "products" : [
    {
      "name" : "Skewer",
      "targets" : [
        "Skewer"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SkewerTests",
      "module_type" : "SwiftTarget",
      "name" : "SkewerTests",
      "path" : "Tests/SkewerTests",
      "sources" : [
        "DecodingTests.swift",
        "EncodingTests.swift"
      ],
      "target_dependencies" : [
        "Skewer"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Skewer",
      "module_type" : "SwiftTarget",
      "name" : "Skewer",
      "path" : "Sources/Skewer",
      "product_memberships" : [
        "Skewer"
      ],
      "sources" : [
        "AnyKey.swift",
        "ComponentTransform.swift",
        "Conversion.swift",
        "Hyphen.swift",
        "KeyDecodingStrategy.swift",
        "KeyEncodingStrategy.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.3"
}
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.