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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 Attributed, reference 3.1.0 (d9c311), with Swift 6.1 for Linux on 26 Apr 2025 23:25:56 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/Nirma/Attributed.git
Reference: 3.1.0
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/Nirma/Attributed
 * tag               3.1.0      -> FETCH_HEAD
HEAD is now at d9c3117 Merge pull request #73 from Nirma/fix/project_modernization_warnings
Cloned https://github.com/Nirma/Attributed.git
Revision (git rev-parse @):
d9c311755c1334c9082d62772c0a1e736ba5fe7f
SUCCESS checkout https://github.com/Nirma/Attributed.git at 3.1.0
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/Nirma/Attributed.git
https://github.com/Nirma/Attributed.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Attributed",
  "name" : "Attributed",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "10.0"
    }
  ],
  "products" : [
    {
      "name" : "Attributed",
      "targets" : [
        "Attributed"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "AttributedTests",
      "module_type" : "SwiftTarget",
      "name" : "AttributedTests",
      "path" : "AttributedTests",
      "sources" : [
        "AttributedPublicTests.swift",
        "AttributesTests.swift",
        "StringExtensionTests.swift"
      ],
      "target_dependencies" : [
        "Attributed"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Attributed",
      "module_type" : "SwiftTarget",
      "name" : "Attributed",
      "path" : "Attributed",
      "product_memberships" : [
        "Attributed"
      ],
      "sources" : [
        "Attributed.swift",
        "Attributes.swift",
        "NSString+Attributed.swift",
        "Operators.swift",
        "String+Attributed.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.3"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-2":/host -w "$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
[3/8] Compiling Attributed Attributes.swift
/host/spi-builder-workspace/Attributed/Attributed.swift:25:8: error: no such module 'UIKit'
23 |
24 | import Foundation
25 | import UIKit
   |        `- error: no such module 'UIKit'
26 |
27 | /**
[4/8] Compiling Attributed Attributed.swift
/host/spi-builder-workspace/Attributed/Attributed.swift:25:8: error: no such module 'UIKit'
23 |
24 | import Foundation
25 | import UIKit
   |        `- error: no such module 'UIKit'
26 |
27 | /**
[5/8] Compiling Attributed NSString+Attributed.swift
/host/spi-builder-workspace/Attributed/Attributed.swift:25:8: error: no such module 'UIKit'
23 |
24 | import Foundation
25 | import UIKit
   |        `- error: no such module 'UIKit'
26 |
27 | /**
error: emit-module command failed with exit code 1 (use -v to see invocation)
[6/8] Emitting module Attributed
/host/spi-builder-workspace/Attributed/Attributed.swift:25:8: error: no such module 'UIKit'
23 |
24 | import Foundation
25 | import UIKit
   |        `- error: no such module 'UIKit'
26 |
27 | /**
[7/8] Compiling Attributed Operators.swift
/host/spi-builder-workspace/Attributed/Attributed.swift:25:8: error: no such module 'UIKit'
23 |
24 | import Foundation
25 | import UIKit
   |        `- error: no such module 'UIKit'
26 |
27 | /**
[8/8] Compiling Attributed String+Attributed.swift
/host/spi-builder-workspace/Attributed/Attributed.swift:25:8: error: no such module 'UIKit'
23 |
24 | import Foundation
25 | import UIKit
   |        `- error: no such module 'UIKit'
26 |
27 | /**
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
[2/7] Compiling Attributed String+Attributed.swift
/host/spi-builder-workspace/Attributed/Attributed.swift:25:8: error: no such module 'UIKit'
23 |
24 | import Foundation
25 | import UIKit
   |        `- error: no such module 'UIKit'
26 |
27 | /**
[3/7] Compiling Attributed NSString+Attributed.swift
/host/spi-builder-workspace/Attributed/Attributed.swift:25:8: error: no such module 'UIKit'
23 |
24 | import Foundation
25 | import UIKit
   |        `- error: no such module 'UIKit'
26 |
27 | /**
[4/7] Compiling Attributed Operators.swift
/host/spi-builder-workspace/Attributed/Attributed.swift:25:8: error: no such module 'UIKit'
23 |
24 | import Foundation
25 | import UIKit
   |        `- error: no such module 'UIKit'
26 |
27 | /**
error: emit-module command failed with exit code 1 (use -v to see invocation)
[5/7] Emitting module Attributed
/host/spi-builder-workspace/Attributed/Attributed.swift:25:8: error: no such module 'UIKit'
23 |
24 | import Foundation
25 | import UIKit
   |        `- error: no such module 'UIKit'
26 |
27 | /**
[6/7] Compiling Attributed Attributes.swift
/host/spi-builder-workspace/Attributed/Attributed.swift:25:8: error: no such module 'UIKit'
23 |
24 | import Foundation
25 | import UIKit
   |        `- error: no such module 'UIKit'
26 |
27 | /**
[7/7] Compiling Attributed Attributed.swift
/host/spi-builder-workspace/Attributed/Attributed.swift:25:8: error: no such module 'UIKit'
23 |
24 | import Foundation
25 | import UIKit
   |        `- error: no such module 'UIKit'
26 |
27 | /**
BUILD FAILURE 6.1 linux