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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 Milepost, reference main (4a3ad9), with Swift 6.1 for Linux on 27 Apr 2025 04:38:44 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/giginet/Milepost.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/giginet/Milepost
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 4a3ad90 Fix license badge
Cloned https://github.com/giginet/Milepost.git
Revision (git rev-parse @):
4a3ad903510f1fd166169adfd59d45ce715f8e1e
SUCCESS checkout https://github.com/giginet/Milepost.git at main
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/giginet/Milepost.git
https://github.com/giginet/Milepost.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Milepost",
  "name" : "Milepost",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "11.0"
    },
    {
      "name" : "macos",
      "version" : "11.0"
    },
    {
      "name" : "tvos",
      "version" : "11.0"
    },
    {
      "name" : "watchos",
      "version" : "4.0"
    }
  ],
  "products" : [
    {
      "name" : "Milepost",
      "targets" : [
        "Milepost"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "PrepareMilepost",
      "targets" : [
        "PrepareMilepost"
      ],
      "type" : {
        "plugin" : null
      }
    },
    {
      "name" : "bundle-generator",
      "targets" : [
        "bundle-generator"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "bundle_generatorTests",
      "module_type" : "SwiftTarget",
      "name" : "bundle-generatorTests",
      "path" : "Tests/bundle-generatorTests",
      "sources" : [
        "FetcherTests.swift"
      ],
      "target_dependencies" : [
        "bundle-generator"
      ],
      "type" : "test"
    },
    {
      "c99name" : "bundle_generator",
      "module_type" : "SwiftTarget",
      "name" : "bundle-generator",
      "path" : "Sources/bundle-generator",
      "product_memberships" : [
        "PrepareMilepost",
        "bundle-generator"
      ],
      "sources" : [
        "Fetcher.swift",
        "PlistGenerator.swift",
        "main.swift"
      ],
      "target_dependencies" : [
        "Milepost"
      ],
      "type" : "executable"
    },
    {
      "c99name" : "PrepareMilepost",
      "module_type" : "PluginTarget",
      "name" : "PrepareMilepost",
      "path" : "Plugins/PrepareMilepost",
      "plugin_capability" : {
        "type" : "buildTool"
      },
      "product_memberships" : [
        "PrepareMilepost"
      ],
      "sources" : [
        "plugin.swift"
      ],
      "target_dependencies" : [
        "bundle-generator"
      ],
      "type" : "plugin"
    },
    {
      "c99name" : "Milepost",
      "module_type" : "SwiftTarget",
      "name" : "Milepost",
      "path" : "Sources/Milepost",
      "product_memberships" : [
        "Milepost",
        "PrepareMilepost",
        "bundle-generator"
      ],
      "sources" : [
        "Revision.swift",
        "RevisionLoader.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7"
}
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
[1/1] Compiling plugin PrepareMilepost
Building for debugging...
[1/14] Write sources
[5/14] Write swift-version-24593BA9C3E375BF.txt
[7/20] Compiling Milepost RevisionLoader.swift
[8/20] Emitting module Milepost
[9/20] Compiling Milepost Revision.swift
[10/21] Compiling Milepost RevisionLoader.swift
[11/21] Compiling Milepost Revision.swift
[12/21] Emitting module Milepost
[14/22] Wrapping AST for Milepost for debugging
[17/30] Compiling bundle_generator main.swift
/host/spi-builder-workspace/Sources/bundle-generator/main.swift:8:21: error: 'ProcessInfo' initializer is inaccessible due to 'internal' protection level
 6 |
 7 | func run() throws {
 8 |     let arguments = ProcessInfo().arguments
   |                     `- error: 'ProcessInfo' initializer is inaccessible due to 'internal' protection level
 9 |
10 |     guard arguments.count == 3 else {
FoundationEssentials.ProcessInfo.init:2:10: note: 'init()' declared here
1 | class ProcessInfo {
2 | internal init()}
  |          `- note: 'init()' declared here
3 |
/host/spi-builder-workspace/Sources/bundle-generator/main.swift:8:21: error: 'ProcessInfo' initializer is inaccessible due to 'internal' protection level
 6 |
 7 | func run() throws {
 8 |     let arguments = ProcessInfo().arguments
   |                     `- error: 'ProcessInfo' initializer is inaccessible due to 'internal' protection level
 9 |
10 |     guard arguments.count == 3 else {
FoundationEssentials.ProcessInfo.init:2:10: note: 'init()' declared here
1 | class ProcessInfo {
2 | internal init()}
  |          `- note: 'init()' declared here
3 |
[19/30] Compiling bundle_generator PlistGenerator.swift
[21/30] Emitting module bundle_generator
[22/30] Compiling bundle_generator Fetcher.swift
/host/spi-builder-workspace/Sources/bundle-generator/Fetcher.swift:91:21: warning: result of call to 'changeCurrentDirectoryPath' is unused
 89 |
 90 |     private func runGit(_ subCommand: String, _ options: String...) throws -> String {
 91 |         fileManager.changeCurrentDirectoryPath(repositoryPath.path)
    |                     `- warning: result of call to 'changeCurrentDirectoryPath' is unused
 92 |         let standardOutput = Pipe()
 93 |         let standardError = Pipe()
[23/30] Emitting module bundle_generator
[24/30] Compiling bundle_generator Fetcher.swift
/host/spi-builder-workspace/Sources/bundle-generator/Fetcher.swift:91:21: warning: result of call to 'changeCurrentDirectoryPath' is unused
 89 |
 90 |     private func runGit(_ subCommand: String, _ options: String...) throws -> String {
 91 |         fileManager.changeCurrentDirectoryPath(repositoryPath.path)
    |                     `- warning: result of call to 'changeCurrentDirectoryPath' is unused
 92 |         let standardOutput = Pipe()
 93 |         let standardError = Pipe()
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
[1/1] Compiling plugin PrepareMilepost
Building for debugging...
[1/10] Write swift-version-24593BA9C3E375BF.txt
[3/16] Compiling Milepost RevisionLoader.swift
[5/16] Emitting module Milepost
[6/16] Compiling Milepost Revision.swift
[8/17] Emitting module Milepost
[9/17] Compiling Milepost Revision.swift
[11/24] Emitting module bundle_generator
[12/24] Compiling bundle_generator PlistGenerator.swift
[13/24] Compiling bundle_generator main.swift
/host/spi-builder-workspace/Sources/bundle-generator/main.swift:8:21: error: 'ProcessInfo' initializer is inaccessible due to 'internal' protection level
 6 |
 7 | func run() throws {
 8 |     let arguments = ProcessInfo().arguments
   |                     `- error: 'ProcessInfo' initializer is inaccessible due to 'internal' protection level
 9 |
10 |     guard arguments.count == 3 else {
FoundationEssentials.ProcessInfo.init:2:10: note: 'init()' declared here
1 | class ProcessInfo {
2 | internal init()}
  |          `- note: 'init()' declared here
3 |
[14/24] Compiling bundle_generator PlistGenerator.swift
[15/24] Compiling bundle_generator Fetcher.swift
/host/spi-builder-workspace/Sources/bundle-generator/Fetcher.swift:91:21: warning: result of call to 'changeCurrentDirectoryPath' is unused
 89 |
 90 |     private func runGit(_ subCommand: String, _ options: String...) throws -> String {
 91 |         fileManager.changeCurrentDirectoryPath(repositoryPath.path)
    |                     `- warning: result of call to 'changeCurrentDirectoryPath' is unused
 92 |         let standardOutput = Pipe()
 93 |         let standardError = Pipe()
[16/24] Compiling bundle_generator main.swift
/host/spi-builder-workspace/Sources/bundle-generator/main.swift:8:21: error: 'ProcessInfo' initializer is inaccessible due to 'internal' protection level
 6 |
 7 | func run() throws {
 8 |     let arguments = ProcessInfo().arguments
   |                     `- error: 'ProcessInfo' initializer is inaccessible due to 'internal' protection level
 9 |
10 |     guard arguments.count == 3 else {
FoundationEssentials.ProcessInfo.init:2:10: note: 'init()' declared here
1 | class ProcessInfo {
2 | internal init()}
  |          `- note: 'init()' declared here
3 |
[17/24] Compiling bundle_generator Fetcher.swift
/host/spi-builder-workspace/Sources/bundle-generator/Fetcher.swift:91:21: warning: result of call to 'changeCurrentDirectoryPath' is unused
 89 |
 90 |     private func runGit(_ subCommand: String, _ options: String...) throws -> String {
 91 |         fileManager.changeCurrentDirectoryPath(repositoryPath.path)
    |                     `- warning: result of call to 'changeCurrentDirectoryPath' is unused
 92 |         let standardOutput = Pipe()
 93 |         let standardError = Pipe()
[18/24] Emitting module bundle_generator
BUILD FAILURE 6.1 linux