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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 Jar, reference 0.0.2 (df0fd4), with Swift 6.1 for Linux on 26 Apr 2025 17:08:47 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/SwiftPackageRepository/Jar.swift.git
Reference: 0.0.2
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/SwiftPackageRepository/Jar.swift
 * tag               0.0.2      -> FETCH_HEAD
HEAD is now at df0fd4f added hello world jar
Cloned https://github.com/SwiftPackageRepository/Jar.swift.git
Revision (git rev-parse @):
df0fd4fedbe5861e61c0b9031a8a2f878813ae8b
SUCCESS checkout https://github.com/SwiftPackageRepository/Jar.swift.git at 0.0.2
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/SwiftPackageRepository/Jar.swift.git
https://github.com/SwiftPackageRepository/Jar.swift.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Jar",
  "name" : "Jar",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "Jar",
      "targets" : [
        "Jar"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "JarTests",
      "module_type" : "SwiftTarget",
      "name" : "JarTests",
      "path" : "Tests/JarTests",
      "sources" : [
        "JarTests.swift"
      ],
      "target_dependencies" : [
        "Jar"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Jar",
      "module_type" : "SwiftTarget",
      "name" : "Jar",
      "path" : "Sources/Jar",
      "product_memberships" : [
        "Jar"
      ],
      "sources" : [
        "Executable.swift",
        "Extensions/NSRegularExpression+Extensions.swift",
        "Extensions/NSTextCheckingResult+Extensions.swift",
        "Extensions/OSLog+Extensions.swift",
        "Jar.swift",
        "Java.swift",
        "JavaVirtualMachine.swift",
        "JavaVirtualMachineParser.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/host -w "$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
[3/10] Compiling Jar Java.swift
/host/spi-builder-workspace/Sources/Jar/Extensions/OSLog+Extensions.swift:27:8: error: no such module 'os.log'
25 |
26 | import Foundation
27 | import os.log
   |        `- error: no such module 'os.log'
28 |
29 | extension OSLog {
[4/10] Compiling Jar Jar.swift
/host/spi-builder-workspace/Sources/Jar/Extensions/OSLog+Extensions.swift:27:8: error: no such module 'os.log'
25 |
26 | import Foundation
27 | import os.log
   |        `- error: no such module 'os.log'
28 |
29 | extension OSLog {
[5/11] Compiling Jar JavaVirtualMachine.swift
/host/spi-builder-workspace/Sources/Jar/Extensions/OSLog+Extensions.swift:27:8: error: no such module 'os.log'
25 |
26 | import Foundation
27 | import os.log
   |        `- error: no such module 'os.log'
28 |
29 | extension OSLog {
[6/11] Compiling Jar OSLog+Extensions.swift
/host/spi-builder-workspace/Sources/Jar/Extensions/OSLog+Extensions.swift:27:8: error: no such module 'os.log'
25 |
26 | import Foundation
27 | import os.log
   |        `- error: no such module 'os.log'
28 |
29 | extension OSLog {
[7/11] Compiling Jar NSTextCheckingResult+Extensions.swift
/host/spi-builder-workspace/Sources/Jar/Extensions/OSLog+Extensions.swift:27:8: error: no such module 'os.log'
25 |
26 | import Foundation
27 | import os.log
   |        `- error: no such module 'os.log'
28 |
29 | extension OSLog {
[8/11] Compiling Jar NSRegularExpression+Extensions.swift
/host/spi-builder-workspace/Sources/Jar/Extensions/OSLog+Extensions.swift:27:8: error: no such module 'os.log'
25 |
26 | import Foundation
27 | import os.log
   |        `- error: no such module 'os.log'
28 |
29 | extension OSLog {
error: emit-module command failed with exit code 1 (use -v to see invocation)
[9/11] Emitting module Jar
/host/spi-builder-workspace/Sources/Jar/Extensions/OSLog+Extensions.swift:27:8: error: no such module 'os.log'
25 |
26 | import Foundation
27 | import os.log
   |        `- error: no such module 'os.log'
28 |
29 | extension OSLog {
[10/11] Compiling Jar Executable.swift
/host/spi-builder-workspace/Sources/Jar/Extensions/OSLog+Extensions.swift:27:8: error: no such module 'os.log'
25 |
26 | import Foundation
27 | import os.log
   |        `- error: no such module 'os.log'
28 |
29 | extension OSLog {
[11/11] Compiling Jar JavaVirtualMachineParser.swift
/host/spi-builder-workspace/Sources/Jar/Extensions/OSLog+Extensions.swift:27:8: error: no such module 'os.log'
25 |
26 | import Foundation
27 | import os.log
   |        `- error: no such module 'os.log'
28 |
29 | extension OSLog {
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
[2/9] Compiling Jar OSLog+Extensions.swift
/host/spi-builder-workspace/Sources/Jar/Extensions/OSLog+Extensions.swift:27:8: error: no such module 'os.log'
25 |
26 | import Foundation
27 | import os.log
   |        `- error: no such module 'os.log'
28 |
29 | extension OSLog {
error: emit-module command failed with exit code 1 (use -v to see invocation)
[3/10] Emitting module Jar
/host/spi-builder-workspace/Sources/Jar/Extensions/OSLog+Extensions.swift:27:8: error: no such module 'os.log'
25 |
26 | import Foundation
27 | import os.log
   |        `- error: no such module 'os.log'
28 |
29 | extension OSLog {
[4/10] Compiling Jar NSTextCheckingResult+Extensions.swift
/host/spi-builder-workspace/Sources/Jar/Extensions/OSLog+Extensions.swift:27:8: error: no such module 'os.log'
25 |
26 | import Foundation
27 | import os.log
   |        `- error: no such module 'os.log'
28 |
29 | extension OSLog {
[5/10] Compiling Jar Executable.swift
/host/spi-builder-workspace/Sources/Jar/Extensions/OSLog+Extensions.swift:27:8: error: no such module 'os.log'
25 |
26 | import Foundation
27 | import os.log
   |        `- error: no such module 'os.log'
28 |
29 | extension OSLog {
[6/10] Compiling Jar NSRegularExpression+Extensions.swift
/host/spi-builder-workspace/Sources/Jar/Extensions/OSLog+Extensions.swift:27:8: error: no such module 'os.log'
25 |
26 | import Foundation
27 | import os.log
   |        `- error: no such module 'os.log'
28 |
29 | extension OSLog {
[7/10] Compiling Jar Jar.swift
/host/spi-builder-workspace/Sources/Jar/Extensions/OSLog+Extensions.swift:27:8: error: no such module 'os.log'
25 |
26 | import Foundation
27 | import os.log
   |        `- error: no such module 'os.log'
28 |
29 | extension OSLog {
[8/10] Compiling Jar JavaVirtualMachine.swift
/host/spi-builder-workspace/Sources/Jar/Extensions/OSLog+Extensions.swift:27:8: error: no such module 'os.log'
25 |
26 | import Foundation
27 | import os.log
   |        `- error: no such module 'os.log'
28 |
29 | extension OSLog {
[9/10] Compiling Jar Java.swift
/host/spi-builder-workspace/Sources/Jar/Extensions/OSLog+Extensions.swift:27:8: error: no such module 'os.log'
25 |
26 | import Foundation
27 | import os.log
   |        `- error: no such module 'os.log'
28 |
29 | extension OSLog {
[10/10] Compiling Jar JavaVirtualMachineParser.swift
/host/spi-builder-workspace/Sources/Jar/Extensions/OSLog+Extensions.swift:27:8: error: no such module 'os.log'
25 |
26 | import Foundation
27 | import os.log
   |        `- error: no such module 'os.log'
28 |
29 | extension OSLog {
BUILD FAILURE 6.1 linux