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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 snap-core, reference main (f1dc2e), with Swift 6.1 for Linux on 28 Apr 2025 16:28:07 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-3":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/simonnickel/snap-core.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/simonnickel/snap-core
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at f1dc2e7 Add SnapFoundation
Cloned https://github.com/simonnickel/snap-core.git
Revision (git rev-parse @):
f1dc2e740961f5607c0271bc13ce6d56f00eff20
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/simonnickel/snap-core.git at main
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/simonnickel/snap-core.git
https://github.com/simonnickel/snap-core.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "snap-foundation",
      "requirement" : {
        "branch" : [
          "main"
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/simonnickel/snap-foundation.git"
    }
  ],
  "manifest_display_name" : "snap-core",
  "name" : "snap-core",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "18.0"
    },
    {
      "name" : "macos",
      "version" : "15.0"
    }
  ],
  "products" : [
    {
      "name" : "SnapCore",
      "targets" : [
        "SnapCore"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "6"
  ],
  "targets" : [
    {
      "c99name" : "SnapCoreTests",
      "module_type" : "SwiftTarget",
      "name" : "SnapCoreTests",
      "path" : "Tests/SnapCoreTests",
      "sources" : [
        "Codable/AngleCodableTests.swift",
        "Codable/FontDesignCodableTests.swift",
        "Codable/UnitPointCodableTests.swift",
        "Swift/ArrayUniquedTests.swift",
        "Swift/CGFloatRoundTests.swift",
        "Swift/CollectionCheckingTests.swift",
        "Swift/SemanticVersionTests.swift",
        "Swift/SetInsertedTests.swift",
        "SwiftUI/ColorAdjustTests.swift"
      ],
      "target_dependencies" : [
        "SnapCore"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SnapCore",
      "module_type" : "SwiftTarget",
      "name" : "SnapCore",
      "path" : "Sources/SnapCore",
      "product_dependencies" : [
        "SnapFoundation"
      ],
      "product_memberships" : [
        "SnapCore"
      ],
      "sources" : [
        "Others/SemanticVersion.swift",
        "Swift/CGFloat+Rounding.swift",
        "Swift/Collections/Array+Unique.swift",
        "Swift/Collections/Collection+Helper.swift",
        "Swift/Collections/Set+Insert.swift",
        "Swift/Publisher+withWeak.swift",
        "Swift/String+Helper.swift",
        "Swift/WeakRef.swift",
        "SwiftUI/AnyLabelStyle.swift",
        "SwiftUI/Codable/Angle+Codable.swift",
        "SwiftUI/Codable/FontDesign+Codable.swift",
        "SwiftUI/Codable/UnitPoint+Codable.swift",
        "SwiftUI/Color+Adjust.swift",
        "SwiftUI/Color+Platform.swift",
        "SwiftUI/EdgeInsets+Helper.swift",
        "SwiftUI/GeometryReader+PreferenceKey.swift",
        "SwiftUI/SystemTypeWrapper/SystemColorScheme.swift",
        "SwiftUI/View+KeyboardPublisher.swift",
        "SwiftUI/ViewModifier/ModalPresentation.swift",
        "SwiftUI/ViewModifier/View+FrameFill.swift",
        "SwiftUI/ViewModifier/ViewModifierConditional.swift",
        "SwiftUI/Views/EmptyNoSpaceView.swift",
        "SwiftUI/Views/PickerTapable.swift",
        "SwiftUI/Views/ScrollViewWith.swift",
        "SwiftUI/Views/ScrollViewWithBottomView.swift",
        "SwiftUI/Views/ToggleTapable.swift",
        "UIKit/UIFont+preferredFont.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-3":/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 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/simonnickel/snap-foundation.git
[1/78] Fetching snap-foundation
Fetched https://github.com/simonnickel/snap-foundation.git from cache (0.37s)
Creating working copy for https://github.com/simonnickel/snap-foundation.git
Working copy of https://github.com/simonnickel/snap-foundation.git resolved at main (d1093b9)
Building for debugging...
[0/3] Write sources
[2/3] Write swift-version-24593BA9C3E375BF.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[4/8] Emitting module SnapFoundation
/host/spi-builder-workspace/.build/checkouts/snap-foundation/Sources/SnapFoundation/OSLog+Logger.swift:7:8: error: no such module 'OSLog'
 5 |
 6 | import Foundation
 7 | import OSLog
   |        `- error: no such module 'OSLog'
 8 |
 9 | public extension Logger {
[5/8] Compiling SnapFoundation EdgeInsets+Helper.swift
/host/spi-builder-workspace/.build/checkouts/snap-foundation/Sources/SnapFoundation/OSLog+Logger.swift:7:8: error: no such module 'OSLog'
 5 |
 6 | import Foundation
 7 | import OSLog
   |        `- error: no such module 'OSLog'
 8 |
 9 | public extension Logger {
[6/8] Compiling SnapFoundation CGRect+Inset.swift
/host/spi-builder-workspace/.build/checkouts/snap-foundation/Sources/SnapFoundation/OSLog+Logger.swift:7:8: error: no such module 'OSLog'
 5 |
 6 | import Foundation
 7 | import OSLog
   |        `- error: no such module 'OSLog'
 8 |
 9 | public extension Logger {
[7/8] Compiling SnapFoundation ProcessInfo+isPreview.swift
/host/spi-builder-workspace/.build/checkouts/snap-foundation/Sources/SnapFoundation/OSLog+Logger.swift:7:8: error: no such module 'OSLog'
 5 |
 6 | import Foundation
 7 | import OSLog
   |        `- error: no such module 'OSLog'
 8 |
 9 | public extension Logger {
[8/8] Compiling SnapFoundation OSLog+Logger.swift
/host/spi-builder-workspace/.build/checkouts/snap-foundation/Sources/SnapFoundation/OSLog+Logger.swift:7:8: error: no such module 'OSLog'
 5 |
 6 | import Foundation
 7 | import OSLog
   |        `- error: no such module 'OSLog'
 8 |
 9 | public extension Logger {
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-3":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu 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
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-24593BA9C3E375BF.txt
[2/6] Compiling SnapFoundation OSLog+Logger.swift
/host/spi-builder-workspace/.build/checkouts/snap-foundation/Sources/SnapFoundation/OSLog+Logger.swift:7:8: error: no such module 'OSLog'
 5 |
 6 | import Foundation
 7 | import OSLog
   |        `- error: no such module 'OSLog'
 8 |
 9 | public extension Logger {
error: emit-module command failed with exit code 1 (use -v to see invocation)
[3/6] Emitting module SnapFoundation
/host/spi-builder-workspace/.build/checkouts/snap-foundation/Sources/SnapFoundation/OSLog+Logger.swift:7:8: error: no such module 'OSLog'
 5 |
 6 | import Foundation
 7 | import OSLog
   |        `- error: no such module 'OSLog'
 8 |
 9 | public extension Logger {
[4/6] Compiling SnapFoundation EdgeInsets+Helper.swift
/host/spi-builder-workspace/.build/checkouts/snap-foundation/Sources/SnapFoundation/OSLog+Logger.swift:7:8: error: no such module 'OSLog'
 5 |
 6 | import Foundation
 7 | import OSLog
   |        `- error: no such module 'OSLog'
 8 |
 9 | public extension Logger {
[5/6] Compiling SnapFoundation CGRect+Inset.swift
/host/spi-builder-workspace/.build/checkouts/snap-foundation/Sources/SnapFoundation/OSLog+Logger.swift:7:8: error: no such module 'OSLog'
 5 |
 6 | import Foundation
 7 | import OSLog
   |        `- error: no such module 'OSLog'
 8 |
 9 | public extension Logger {
[6/6] Compiling SnapFoundation ProcessInfo+isPreview.swift
/host/spi-builder-workspace/.build/checkouts/snap-foundation/Sources/SnapFoundation/OSLog+Logger.swift:7:8: error: no such module 'OSLog'
 5 |
 6 | import Foundation
 7 | import OSLog
   |        `- error: no such module 'OSLog'
 8 |
 9 | public extension Logger {
BUILD FAILURE 6.1 linux