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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 BundleInfoVersioning, reference master (d7d2b3), with Swift 6.1 for Linux on 25 Apr 2025 10:27:16 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/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/nsagora/bundle-info-versioning.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/nsagora/bundle-info-versioning
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at d7d2b3e Merge pull request #6 from nsagora/swiftui-issue
Cloned https://github.com/nsagora/bundle-info-versioning.git
Revision (git rev-parse @):
d7d2b3ed03022fceb97c4109b1973f2a81636506
SUCCESS checkout https://github.com/nsagora/bundle-info-versioning.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/nsagora/bundle-info-versioning.git
https://github.com/nsagora/bundle-info-versioning.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "BundleInfoVersioning",
  "name" : "BundleInfoVersioning",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "8.0"
    },
    {
      "name" : "macos",
      "version" : "10.10"
    },
    {
      "name" : "tvos",
      "version" : "9.0"
    },
    {
      "name" : "watchos",
      "version" : "2.0"
    }
  ],
  "products" : [
    {
      "name" : "BundleInfoVersioning",
      "targets" : [
        "BundleInfoVersioning"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "BundleInfoVersioningTests",
      "module_type" : "SwiftTarget",
      "name" : "BundleInfoVersioningTests",
      "path" : "Tests/BundleInfoVersioningTests",
      "sources" : [
        "BundleInfoObserverTests.swift",
        "Fakes/FakeBundle.swift",
        "Fakes/FakeStorage.swift",
        "Fakes/FakeUserDefaults.swift",
        "UserDefaultsStorageTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "BundleInfoVersioning"
      ],
      "type" : "test"
    },
    {
      "c99name" : "BundleInfoVersioning",
      "module_type" : "SwiftTarget",
      "name" : "BundleInfoVersioning",
      "path" : "Sources/BundleInfoVersioning",
      "product_memberships" : [
        "BundleInfoVersioning"
      ],
      "sources" : [
        "BundleInfoVersioning.swift",
        "Extensions/Dictionary+Extensions.swift",
        "Extensions/UserDefaults+Extension.swift",
        "Storage/Storage.swift",
        "Storage/UserDefaultsStorage.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/8] Compiling BundleInfoVersioning UserDefaultsStorage.swift
/host/spi-builder-workspace/Sources/BundleInfoVersioning/Storage/UserDefaultsStorage.swift:5:25: warning: static property 'prefix' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 3 | internal class UserDefaultsStorage: Storage {
 4 |
 5 |     internal static var prefix = "com.nsagora.storage."
   |                         |- warning: static property 'prefix' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                         |- note: convert 'prefix' to a 'let' constant to make 'Sendable' shared state immutable
   |                         |- note: add '@MainActor' to make static property 'prefix' part of global actor 'MainActor'
   |                         `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 6 |
 7 |     private var userDefautlts = UserDefaults.standard
[4/8] Compiling BundleInfoVersioning UserDefaults+Extension.swift
/host/spi-builder-workspace/Sources/BundleInfoVersioning/Extensions/UserDefaults+Extension.swift:6:16: error: generic parameter 'T' could not be inferred
3 | extension UserDefaults {
4 |
5 |     internal func value<T>(forKey key: String) -> T? {
  |                   `- note: in call to function 'value(forKey:)'
6 |         return value(forKey: key) as? T
  |                `- error: generic parameter 'T' could not be inferred
7 |     }
8 | }
[5/8] Compiling BundleInfoVersioning Storage.swift
[6/8] Compiling BundleInfoVersioning Dictionary+Extensions.swift
[7/8] Compiling BundleInfoVersioning BundleInfoVersioning.swift
[8/8] Emitting module BundleInfoVersioning
/host/spi-builder-workspace/Sources/BundleInfoVersioning/Storage/UserDefaultsStorage.swift:5:25: warning: static property 'prefix' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 3 | internal class UserDefaultsStorage: Storage {
 4 |
 5 |     internal static var prefix = "com.nsagora.storage."
   |                         |- warning: static property 'prefix' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                         |- note: convert 'prefix' to a 'let' constant to make 'Sendable' shared state immutable
   |                         |- note: add '@MainActor' to make static property 'prefix' part of global actor 'MainActor'
   |                         `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 6 |
 7 |     private var userDefautlts = UserDefaults.standard
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/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
[2/7] Compiling BundleInfoVersioning UserDefaults+Extension.swift
/host/spi-builder-workspace/Sources/BundleInfoVersioning/Extensions/UserDefaults+Extension.swift:6:16: error: generic parameter 'T' could not be inferred
3 | extension UserDefaults {
4 |
5 |     internal func value<T>(forKey key: String) -> T? {
  |                   `- note: in call to function 'value(forKey:)'
6 |         return value(forKey: key) as? T
  |                `- error: generic parameter 'T' could not be inferred
7 |     }
8 | }
[3/7] Compiling BundleInfoVersioning UserDefaultsStorage.swift
[4/7] Compiling BundleInfoVersioning Storage.swift
[5/7] Emitting module BundleInfoVersioning
[6/7] Compiling BundleInfoVersioning BundleInfoVersioning.swift
[7/7] Compiling BundleInfoVersioning Dictionary+Extensions.swift
BUILD FAILURE 6.1 linux