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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 Lilliput, reference master (aac738), with Swift 6.1 for Linux on 28 Apr 2025 23:48:33 UTC.

Swift 6 data race errors: 0

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-2":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-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: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/jkolb/lilliput.git
Reference: master
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/jkolb/lilliput
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at aac7384 Clean up README. Not sure why Package.resolved wasn't commited previously.
Cloned https://github.com/jkolb/lilliput.git
Revision (git rev-parse @):
aac7384681043b202bd1c9f626a4b0454fe66d3e
SUCCESS checkout https://github.com/jkolb/lilliput.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/jkolb/lilliput.git
https://github.com/jkolb/lilliput.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "swift-system",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-system.git"
    }
  ],
  "manifest_display_name" : "Lilliput",
  "name" : "Lilliput",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "16.0"
    },
    {
      "name" : "macos",
      "version" : "11.0"
    },
    {
      "name" : "watchos",
      "version" : "9.0"
    }
  ],
  "products" : [
    {
      "name" : "Lilliput",
      "targets" : [
        "Lilliput"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "LilliputTests",
      "module_type" : "SwiftTarget",
      "name" : "LilliputTests",
      "path" : "Tests/LilliputTests",
      "sources" : [
        "ByteAlignmentTests.swift"
      ],
      "target_dependencies" : [
        "Lilliput"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Lilliput",
      "module_type" : "SwiftTarget",
      "name" : "Lilliput",
      "path" : "Sources/Lilliput",
      "product_dependencies" : [
        "SystemPackage"
      ],
      "product_memberships" : [
        "Lilliput"
      ],
      "sources" : [
        "ByteAlignment.swift",
        "ByteBuffer.swift",
        "ByteDecoder.swift",
        "ByteEncoder.swift",
        "ByteError.swift",
        "ByteReader.swift",
        "ByteSpan.swift",
        "ByteTuple.swift",
        "ByteWriter.swift",
        "CP1252.swift",
        "CollectionByteDecoder.swift",
        "Element.swift",
        "FileDescriptor+ByteBuffer.swift",
        "FileDescriptor+ReadAll.swift",
        "FoundationAdditions.swift",
        "HexString.swift",
        "KeyValue.swift",
        "Magic2.swift",
        "Magic4.swift",
        "RawValue.swift",
        "String.swift",
        "ValueKey.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-2":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-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-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:3bdcac04179f4ed3e5b8e9dbd6e74bbf5ebc0f4fde48bbaad7d1e5c757e65bcb
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.1-latest
Fetching https://github.com/apple/swift-system.git
[1/4364] Fetching swift-system
Fetched https://github.com/apple/swift-system.git from cache (0.50s)
Computing version for https://github.com/apple/swift-system.git
Computed https://github.com/apple/swift-system.git at 1.4.2 (1.51s)
Creating working copy for https://github.com/apple/swift-system.git
Working copy of https://github.com/apple/swift-system.git resolved at 1.4.2
Building for debugging...
[0/4] Write sources
[2/4] Compiling CSystem shims.c
[3/4] Write swift-version-24593BA9C3E375BF.txt
[5/32] Emitting module SystemPackage
[6/35] Compiling SystemPackage MachPort.swift
[7/35] Compiling SystemPackage PlatformString.swift
[8/35] Compiling SystemPackage SystemString.swift
[9/35] Compiling SystemPackage FilePathTempPosix.swift
[10/35] Compiling SystemPackage FilePathTempWindows.swift
[11/35] Compiling SystemPackage FilePathWindows.swift
[12/35] Compiling SystemPackage FilePermissions.swift
[13/35] Compiling SystemPackage Errno.swift
[14/35] Compiling SystemPackage ErrnoWindows.swift
[15/35] Compiling SystemPackage FileDescriptor.swift
[16/35] Compiling SystemPackage FileHelpers.swift
[17/35] Compiling SystemPackage FilePathParsing.swift
[18/35] Compiling SystemPackage FilePathString.swift
[19/35] Compiling SystemPackage FilePathSyntax.swift
[20/35] Compiling SystemPackage FilePathTemp.swift
[21/35] Compiling SystemPackage FileOperations.swift
[22/35] Compiling SystemPackage FilePath.swift
[23/35] Compiling SystemPackage FilePathComponentView.swift
[24/35] Compiling SystemPackage FilePathComponents.swift
[25/35] Compiling SystemPackage Util+StringArray.swift
[26/35] Compiling SystemPackage Util.swift
[27/35] Compiling SystemPackage UtilConsumers.swift
[28/35] Compiling SystemPackage Mocking.swift
[29/35] Compiling SystemPackage RawBuffer.swift
[30/35] Compiling SystemPackage Syscalls.swift
[31/35] Compiling SystemPackage WindowsSyscallAdapters.swift
[32/35] Compiling SystemPackage Backcompat.swift
[33/35] Compiling SystemPackage CInterop.swift
[34/35] Compiling SystemPackage Constants.swift
[35/35] Compiling SystemPackage Exports.swift
[37/57] Compiling Lilliput HexString.swift
[38/57] Compiling Lilliput KeyValue.swift
[39/57] Compiling Lilliput Magic2.swift
[40/57] Compiling Lilliput Magic4.swift
[41/57] Compiling Lilliput RawValue.swift
[42/59] Compiling Lilliput CP1252.swift
[43/59] Compiling Lilliput CollectionByteDecoder.swift
[44/59] Compiling Lilliput Element.swift
[45/59] Compiling Lilliput ByteEncoder.swift
[46/59] Compiling Lilliput ByteError.swift
[47/59] Compiling Lilliput ByteReader.swift
[48/59] Compiling Lilliput String.swift
[49/59] Compiling Lilliput ValueKey.swift
[50/59] Compiling Lilliput ByteAlignment.swift
[51/59] Compiling Lilliput ByteBuffer.swift
[52/59] Compiling Lilliput ByteDecoder.swift
[53/59] Emitting module Lilliput
[54/59] Compiling Lilliput ByteSpan.swift
[55/59] Compiling Lilliput ByteTuple.swift
[56/59] Compiling Lilliput ByteWriter.swift
[57/59] Compiling Lilliput FileDescriptor+ByteBuffer.swift
[58/59] Compiling Lilliput FileDescriptor+ReadAll.swift
[59/59] Compiling Lilliput FoundationAdditions.swift
Build complete! (22.58s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "swift-system",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-system.git"
    }
  ],
  "manifest_display_name" : "Lilliput",
  "name" : "Lilliput",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "16.0"
    },
    {
      "name" : "macos",
      "version" : "11.0"
    },
    {
      "name" : "watchos",
      "version" : "9.0"
    }
  ],
  "products" : [
    {
      "name" : "Lilliput",
      "targets" : [
        "Lilliput"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "LilliputTests",
      "module_type" : "SwiftTarget",
      "name" : "LilliputTests",
      "path" : "Tests/LilliputTests",
      "sources" : [
        "ByteAlignmentTests.swift"
      ],
      "target_dependencies" : [
        "Lilliput"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Lilliput",
      "module_type" : "SwiftTarget",
      "name" : "Lilliput",
      "path" : "Sources/Lilliput",
      "product_dependencies" : [
        "SystemPackage"
      ],
      "product_memberships" : [
        "Lilliput"
      ],
      "sources" : [
        "ByteAlignment.swift",
        "ByteBuffer.swift",
        "ByteDecoder.swift",
        "ByteEncoder.swift",
        "ByteError.swift",
        "ByteReader.swift",
        "ByteSpan.swift",
        "ByteTuple.swift",
        "ByteWriter.swift",
        "CP1252.swift",
        "CollectionByteDecoder.swift",
        "Element.swift",
        "FileDescriptor+ByteBuffer.swift",
        "FileDescriptor+ReadAll.swift",
        "FoundationAdditions.swift",
        "HexString.swift",
        "KeyValue.swift",
        "Magic2.swift",
        "Magic4.swift",
        "RawValue.swift",
        "String.swift",
        "ValueKey.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
basic-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:3bdcac04179f4ed3e5b8e9dbd6e74bbf5ebc0f4fde48bbaad7d1e5c757e65bcb
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.1-latest
Done.