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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 Kyu, reference master (4d439e), with Swift 6.1 for Linux on 26 Apr 2025 19:50:01 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/reddavis/Kyu.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/reddavis/Kyu
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 4d439ef Add MIT license
Cloned https://github.com/reddavis/Kyu.git
Revision (git rev-parse @):
4d439ef25834eafcd2a10d86d0cbe9db126f8604
SUCCESS checkout https://github.com/reddavis/Kyu.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/reddavis/Kyu.git
https://github.com/reddavis/Kyu.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Kyu",
  "name" : "Kyu",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "15.0"
    },
    {
      "name" : "macos",
      "version" : "12.0"
    }
  ],
  "products" : [
    {
      "name" : "Kyu",
      "targets" : [
        "Kyu"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "KyuTests",
      "module_type" : "SwiftTarget",
      "name" : "KyuTests",
      "path" : "KyuTests",
      "sources" : [
        "Source/AppendNewLineJob.swift",
        "Source/Assertions.swift",
        "Source/Tests/DirectoryTests.swift",
        "Source/Tests/KyuTests.swift"
      ],
      "target_dependencies" : [
        "Kyu"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Kyu",
      "module_type" : "SwiftTarget",
      "name" : "Kyu",
      "path" : "Kyu",
      "product_memberships" : [
        "Kyu"
      ],
      "sources" : [
        "Source/Directory.swift",
        "Source/Job.swift",
        "Source/Kyu.swift",
        "Source/Logger.swift",
        "Source/Runner.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.3"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/host -w "$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 Kyu Runner.swift
/host/spi-builder-workspace/Kyu/Source/Logger.swift:10:8: error: no such module 'os.log'
 8 |
 9 | import Foundation
10 | import os.log
   |        `- error: no such module 'os.log'
11 |
12 |
[4/8] Compiling Kyu Kyu.swift
/host/spi-builder-workspace/Kyu/Source/Logger.swift:10:8: error: no such module 'os.log'
 8 |
 9 | import Foundation
10 | import os.log
   |        `- error: no such module 'os.log'
11 |
12 |
[5/8] Compiling Kyu Job.swift
/host/spi-builder-workspace/Kyu/Source/Logger.swift:10:8: error: no such module 'os.log'
 8 |
 9 | import Foundation
10 | import os.log
   |        `- error: no such module 'os.log'
11 |
12 |
[6/8] Compiling Kyu Logger.swift
/host/spi-builder-workspace/Kyu/Source/Logger.swift:10:8: error: no such module 'os.log'
 8 |
 9 | import Foundation
10 | import os.log
   |        `- error: no such module 'os.log'
11 |
12 |
error: emit-module command failed with exit code 1 (use -v to see invocation)
[7/8] Emitting module Kyu
/host/spi-builder-workspace/Kyu/Source/Logger.swift:10:8: error: no such module 'os.log'
 8 |
 9 | import Foundation
10 | import os.log
   |        `- error: no such module 'os.log'
11 |
12 |
[8/8] Compiling Kyu Directory.swift
/host/spi-builder-workspace/Kyu/Source/Logger.swift:10:8: error: no such module 'os.log'
 8 |
 9 | import Foundation
10 | import os.log
   |        `- error: no such module 'os.log'
11 |
12 |
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
warning: 'spi-builder-workspace': found 1 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
    /host/spi-builder-workspace/KyuTests/Supporting Files/Info.plist
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-24593BA9C3E375BF.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[2/7] Emitting module Kyu
/host/spi-builder-workspace/Kyu/Source/Logger.swift:10:8: error: no such module 'os.log'
 8 |
 9 | import Foundation
10 | import os.log
   |        `- error: no such module 'os.log'
11 |
12 |
[3/7] Compiling Kyu Directory.swift
/host/spi-builder-workspace/Kyu/Source/Logger.swift:10:8: error: no such module 'os.log'
 8 |
 9 | import Foundation
10 | import os.log
   |        `- error: no such module 'os.log'
11 |
12 |
[4/7] Compiling Kyu Job.swift
/host/spi-builder-workspace/Kyu/Source/Logger.swift:10:8: error: no such module 'os.log'
 8 |
 9 | import Foundation
10 | import os.log
   |        `- error: no such module 'os.log'
11 |
12 |
[5/7] Compiling Kyu Kyu.swift
/host/spi-builder-workspace/Kyu/Source/Logger.swift:10:8: error: no such module 'os.log'
 8 |
 9 | import Foundation
10 | import os.log
   |        `- error: no such module 'os.log'
11 |
12 |
[6/7] Compiling Kyu Logger.swift
/host/spi-builder-workspace/Kyu/Source/Logger.swift:10:8: error: no such module 'os.log'
 8 |
 9 | import Foundation
10 | import os.log
   |        `- error: no such module 'os.log'
11 |
12 |
[7/7] Compiling Kyu Runner.swift
/host/spi-builder-workspace/Kyu/Source/Logger.swift:10:8: error: no such module 'os.log'
 8 |
 9 | import Foundation
10 | import os.log
   |        `- error: no such module 'os.log'
11 |
12 |
BUILD FAILURE 6.1 linux