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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 FeatureFlagsController, reference master (2a1e5e), with Swift 6.1 for Linux on 27 Apr 2025 02:20:13 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/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/DataDog/FeatureFlagsController-iOS.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/DataDog/FeatureFlagsController-iOS
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 2a1e5ee Version 1.0.1
Cloned https://github.com/DataDog/FeatureFlagsController-iOS.git
Revision (git rev-parse @):
2a1e5ee046e2754d04beb73cd258f4ca52d502a6
SUCCESS checkout https://github.com/DataDog/FeatureFlagsController-iOS.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/DataDog/FeatureFlagsController-iOS.git
https://github.com/DataDog/FeatureFlagsController-iOS.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "FeatureFlagsController",
  "name" : "FeatureFlagsController",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "13.0"
    }
  ],
  "products" : [
    {
      "name" : "FeatureFlagsController",
      "targets" : [
        "FeatureFlagsController"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "FeatureFlagsControllerTests",
      "module_type" : "SwiftTarget",
      "name" : "FeatureFlagsControllerTests",
      "path" : "Tests/FeatureFlagsControllerTests",
      "sources" : [
        "FeatureFlagsControllerTests.swift"
      ],
      "target_dependencies" : [
        "FeatureFlagsController"
      ],
      "type" : "test"
    },
    {
      "c99name" : "FeatureFlagsController",
      "module_type" : "SwiftTarget",
      "name" : "FeatureFlagsController",
      "path" : "Sources/FeatureFlagsController",
      "product_memberships" : [
        "FeatureFlagsController"
      ],
      "sources" : [
        "FeatureFlag.swift",
        "FeatureFlagType.swift",
        "FeatureFlagsController.swift",
        "Flag Types/CountFeatureFlag.swift",
        "Flag Types/FeatureFlagsGroup.swift",
        "Flag Types/PickerFeatureFlag.swift",
        "Flag Types/ToggleFeatureFlag.swift",
        "UI/FeatureFlagViewFactory.swift",
        "UI/FeatureFlagsView.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$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
[3/11] Compiling FeatureFlagsController ToggleFeatureFlag.swift
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
[4/12] Compiling FeatureFlagsController PickerFeatureFlag.swift
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
[5/12] Compiling FeatureFlagsController FeatureFlagsGroup.swift
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
[6/12] Compiling FeatureFlagsController CountFeatureFlag.swift
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
error: emit-module command failed with exit code 1 (use -v to see invocation)
[7/12] Emitting module FeatureFlagsController
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
[8/12] Compiling FeatureFlagsController FeatureFlagsController.swift
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
[9/12] Compiling FeatureFlagsController FeatureFlag.swift
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
[10/12] Compiling FeatureFlagsController FeatureFlagType.swift
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
[11/12] Compiling FeatureFlagsController FeatureFlagViewFactory.swift
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
[12/12] Compiling FeatureFlagsController FeatureFlagsView.swift
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/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
[2/10] Compiling FeatureFlagsController FeatureFlagsController.swift
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
[3/11] Compiling FeatureFlagsController ToggleFeatureFlag.swift
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
[4/11] Compiling FeatureFlagsController FeatureFlagViewFactory.swift
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
[5/11] Compiling FeatureFlagsController FeatureFlag.swift
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
[6/11] Compiling FeatureFlagsController FeatureFlagType.swift
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
error: emit-module command failed with exit code 1 (use -v to see invocation)
[7/11] Emitting module FeatureFlagsController
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
[8/11] Compiling FeatureFlagsController CountFeatureFlag.swift
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
[9/11] Compiling FeatureFlagsController PickerFeatureFlag.swift
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
[10/11] Compiling FeatureFlagsController FeatureFlagsGroup.swift
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
[11/11] Compiling FeatureFlagsController FeatureFlagsView.swift
/host/spi-builder-workspace/Sources/FeatureFlagsController/FeatureFlag.swift:7:8: error: no such module 'SwiftUI'
 5 |  */
 6 |
 7 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 8 | import Combine
 9 |
BUILD FAILURE 6.1 linux