The Swift Package Index logo.Swift Package Index

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 Checkbox, reference 1.0.1 (7276e6), with Swift 6.1 for Linux on 26 Apr 2025 14:38:36 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/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/bradhowes/Checkbox.git
Reference: 1.0.1
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/bradhowes/Checkbox
 * tag               1.0.1      -> FETCH_HEAD
HEAD is now at 7276e6a Serialize value updates
Cloned https://github.com/bradhowes/Checkbox.git
Revision (git rev-parse @):
7276e6ade2040d6163588084fda32f7e85d6b0d4
SUCCESS checkout https://github.com/bradhowes/Checkbox.git at 1.0.1
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/bradhowes/Checkbox.git
https://github.com/bradhowes/Checkbox.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "swift-snapshot-testing",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.8.1",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/pointfreeco/swift-snapshot-testing.git"
    }
  ],
  "manifest_display_name" : "Checkbox",
  "name" : "Checkbox",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "11.0"
    }
  ],
  "products" : [
    {
      "name" : "Checkbox",
      "targets" : [
        "Checkbox"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CheckboxTests",
      "module_type" : "SwiftTarget",
      "name" : "CheckboxTests",
      "path" : "Tests/CheckboxTests",
      "product_dependencies" : [
        "SnapshotTesting"
      ],
      "sources" : [
        "CheckboxTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Checkbox"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Checkbox",
      "module_type" : "SwiftTarget",
      "name" : "Checkbox",
      "path" : "Sources/Checkbox",
      "product_memberships" : [
        "Checkbox"
      ],
      "sources" : [
        "Checkbox.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.3"
}
warning: 'spi-builder-workspace': Invalid Exclude '/host/spi-builder-workspace/Sources/Checkbox/Checkbox.playground': File not found.
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/host -w "$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
Fetching https://github.com/pointfreeco/swift-snapshot-testing.git
[1/13159] Fetching swift-snapshot-testing
Fetched https://github.com/pointfreeco/swift-snapshot-testing.git from cache (1.67s)
Computing version for https://github.com/pointfreeco/swift-snapshot-testing.git
Computed https://github.com/pointfreeco/swift-snapshot-testing.git at 1.18.3 (2.13s)
Fetching https://github.com/pointfreeco/swift-custom-dump
Fetching https://github.com/swiftlang/swift-syntax
[1/4581] Fetching swift-custom-dump
[4582/74813] Fetching swift-custom-dump, swift-syntax
Fetched https://github.com/pointfreeco/swift-custom-dump from cache (4.94s)
Fetched https://github.com/swiftlang/swift-syntax from cache (4.99s)
Computing version for https://github.com/pointfreeco/swift-custom-dump
Computed https://github.com/pointfreeco/swift-custom-dump at 1.3.3 (5.44s)
Fetching https://github.com/pointfreeco/xctest-dynamic-overlay
[1/5388] Fetching xctest-dynamic-overlay
Fetched https://github.com/pointfreeco/xctest-dynamic-overlay from cache (0.55s)
Computing version for https://github.com/swiftlang/swift-syntax
Computed https://github.com/swiftlang/swift-syntax at 601.0.1 (1.16s)
Computing version for https://github.com/pointfreeco/xctest-dynamic-overlay
Computed https://github.com/pointfreeco/xctest-dynamic-overlay at 1.5.2 (0.49s)
Creating working copy for https://github.com/pointfreeco/swift-custom-dump
Working copy of https://github.com/pointfreeco/swift-custom-dump resolved at 1.3.3
Creating working copy for https://github.com/swiftlang/swift-syntax
Working copy of https://github.com/swiftlang/swift-syntax resolved at 601.0.1
Creating working copy for https://github.com/pointfreeco/xctest-dynamic-overlay
Working copy of https://github.com/pointfreeco/xctest-dynamic-overlay resolved at 1.5.2
Creating working copy for https://github.com/pointfreeco/swift-snapshot-testing.git
Working copy of https://github.com/pointfreeco/swift-snapshot-testing.git resolved at 1.18.3
warning: 'spi-builder-workspace': Invalid Exclude '/host/spi-builder-workspace/Sources/Checkbox/Checkbox.playground': File not found.
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[3/4] Emitting module Checkbox
/host/spi-builder-workspace/Sources/Checkbox/Checkbox.swift:3:8: error: no such module 'UIKit'
  1 | // Copyright © 2018 Brad Howes. All rights reserved.
  2 |
  3 | import UIKit
    |        `- error: no such module 'UIKit'
  4 | import os
  5 |
[4/4] Compiling Checkbox Checkbox.swift
/host/spi-builder-workspace/Sources/Checkbox/Checkbox.swift:3:8: error: no such module 'UIKit'
  1 | // Copyright © 2018 Brad Howes. All rights reserved.
  2 |
  3 | import UIKit
    |        `- error: no such module 'UIKit'
  4 | import os
  5 |
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/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': Invalid Exclude '/host/spi-builder-workspace/Sources/Checkbox/Checkbox.playground': File not found.
[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)
[2/3] Emitting module Checkbox
/host/spi-builder-workspace/Sources/Checkbox/Checkbox.swift:3:8: error: no such module 'UIKit'
  1 | // Copyright © 2018 Brad Howes. All rights reserved.
  2 |
  3 | import UIKit
    |        `- error: no such module 'UIKit'
  4 | import os
  5 |
[3/3] Compiling Checkbox Checkbox.swift
/host/spi-builder-workspace/Sources/Checkbox/Checkbox.swift:3:8: error: no such module 'UIKit'
  1 | // Copyright © 2018 Brad Howes. All rights reserved.
  2 |
  3 | import UIKit
    |        `- error: no such module 'UIKit'
  4 | import os
  5 |
BUILD FAILURE 6.1 linux