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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 Docopt, reference master (550ea3), with Swift 6.1 for Linux on 25 Apr 2025 12:34:50 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-2":/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/docopt/docopt.swift.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/docopt/docopt.swift
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 550ea32 Fix warning with Swift 4.2 / Xcode 10 (#16)
Cloned https://github.com/docopt/docopt.swift.git
Revision (git rev-parse @):
550ea32104f82942c4d6577858077d09c9265838
SUCCESS checkout https://github.com/docopt/docopt.swift.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/docopt/docopt.swift.git
https://github.com/docopt/docopt.swift.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Docopt",
  "name" : "Docopt",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Docopt",
      "targets" : [
        "Docopt"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "Docopt",
      "module_type" : "SwiftTarget",
      "name" : "Docopt",
      "path" : "Sources",
      "product_memberships" : [
        "Docopt"
      ],
      "sources" : [
        "Argument.swift",
        "BranchPattern.swift",
        "Command.swift",
        "Docopt.swift",
        "DocoptError.swift",
        "Either.swift",
        "LeafPattern.swift",
        "OneOrMore.swift",
        "Option.swift",
        "Optional.swift",
        "OptionsShortcut.swift",
        "Pattern.swift",
        "Required.swift",
        "String.swift",
        "Tokens.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-2":/host -w "$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
[3/17] Compiling Docopt OptionsShortcut.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[4/17] Compiling Docopt Pattern.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[5/17] Compiling Docopt Required.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[6/17] Compiling Docopt String.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[7/18] Compiling Docopt Option.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[8/18] Compiling Docopt Optional.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[9/18] Compiling Docopt DocoptError.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[10/18] Compiling Docopt Either.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[11/18] Compiling Docopt LeafPattern.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[12/18] Compiling Docopt OneOrMore.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
error: emit-module command failed with exit code 1 (use -v to see invocation)
[13/18] Emitting module Docopt
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[14/18] Compiling Docopt Command.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[15/18] Compiling Docopt Docopt.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[16/18] Compiling Docopt Argument.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[17/18] Compiling Docopt BranchPattern.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[18/18] Compiling Docopt Tokens.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-2":/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
[2/16] Compiling Docopt DocoptError.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[3/16] Compiling Docopt Either.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[4/17] Compiling Docopt Tokens.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[5/17] Compiling Docopt Required.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[6/17] Compiling Docopt String.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[7/17] Compiling Docopt OptionsShortcut.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[8/17] Compiling Docopt Pattern.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[9/17] Compiling Docopt Option.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[10/17] Compiling Docopt Optional.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[11/17] Compiling Docopt LeafPattern.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[12/17] Compiling Docopt OneOrMore.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
error: emit-module command failed with exit code 1 (use -v to see invocation)
[13/17] Emitting module Docopt
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[14/17] Compiling Docopt Command.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[15/17] Compiling Docopt Docopt.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[16/17] Compiling Docopt Argument.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
[17/17] Compiling Docopt BranchPattern.swift
/host/spi-builder-workspace/Sources/Docopt.swift:10:8: error: no such module 'Darwin'
  8 |
  9 | import Foundation
 10 | import Darwin
    |        `- error: no such module 'Darwin'
 11 |
 12 | @objc
BUILD FAILURE 6.1 linux