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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 ArrowView, reference main (91d194), with Swift 6.1 for macOS (SPM) on 26 Apr 2025 18:04:44 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/bradhowes/ArrowView.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/bradhowes/ArrowView
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 91d194c Fix coverage generation
Cloned https://github.com/bradhowes/ArrowView.git
Revision (git rev-parse @):
91d194cb0576c8bcd50027ad069320b787d3422d
SUCCESS checkout https://github.com/bradhowes/ArrowView.git at main
Fetching https://github.com/pointfreeco/swift-snapshot-testing.git from cache
Fetched https://github.com/pointfreeco/swift-snapshot-testing.git from cache (0.49s)
Computing version for https://github.com/pointfreeco/swift-snapshot-testing.git
Computed https://github.com/pointfreeco/swift-snapshot-testing.git at 1.18.3 (1.02s)
Fetching https://github.com/pointfreeco/swift-custom-dump from cache
Fetching https://github.com/swiftlang/swift-syntax from cache
Fetched https://github.com/pointfreeco/swift-custom-dump from cache (0.42s)
Fetched https://github.com/swiftlang/swift-syntax from cache (1.19s)
Computing version for https://github.com/pointfreeco/swift-custom-dump
Computed https://github.com/pointfreeco/swift-custom-dump at 1.3.3 (1.71s)
Fetching https://github.com/pointfreeco/xctest-dynamic-overlay from cache
Fetched https://github.com/pointfreeco/xctest-dynamic-overlay from cache (0.42s)
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 (0.50s)
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/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
Creating working copy for https://github.com/swiftlang/swift-syntax
Working copy of https://github.com/swiftlang/swift-syntax resolved at 601.0.1
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
{
  "identity": ".resolve-product-dependencies",
  "name": "resolve-dependencies",
  "url": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "version": "unspecified",
  "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "dependencies": [
    {
      "identity": "arrowview",
      "name": "ArrowView",
      "url": "https://github.com/bradhowes/ArrowView.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/ArrowView",
      "dependencies": [
        {
          "identity": "swift-snapshot-testing",
          "name": "swift-snapshot-testing",
          "url": "https://github.com/pointfreeco/swift-snapshot-testing.git",
          "version": "1.18.3",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-snapshot-testing",
          "dependencies": [
            {
              "identity": "swift-custom-dump",
              "name": "swift-custom-dump",
              "url": "https://github.com/pointfreeco/swift-custom-dump",
              "version": "1.3.3",
              "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-custom-dump",
              "dependencies": [
                {
                  "identity": "xctest-dynamic-overlay",
                  "name": "xctest-dynamic-overlay",
                  "url": "https://github.com/pointfreeco/xctest-dynamic-overlay",
                  "version": "1.5.2",
                  "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/xctest-dynamic-overlay",
                  "dependencies": [
                  ]
                }
              ]
            },
            {
              "identity": "swift-syntax",
              "name": "swift-syntax",
              "url": "https://github.com/swiftlang/swift-syntax",
              "version": "601.0.1",
              "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-syntax",
              "dependencies": [
              ]
            }
          ]
        }
      ]
    }
  ]
}
Fetching https://github.com/bradhowes/ArrowView.git
[1/174] Fetching arrowview
Fetched https://github.com/bradhowes/ArrowView.git from cache (0.84s)
Fetching https://github.com/pointfreeco/swift-snapshot-testing.git from cache
Fetched https://github.com/pointfreeco/swift-snapshot-testing.git from cache (0.54s)
Computing version for https://github.com/pointfreeco/swift-snapshot-testing.git
Computed https://github.com/pointfreeco/swift-snapshot-testing.git at 1.18.3 (0.61s)
Fetching https://github.com/swiftlang/swift-syntax from cache
Fetching https://github.com/pointfreeco/swift-custom-dump from cache
Fetched https://github.com/pointfreeco/swift-custom-dump from cache (0.84s)
Fetched https://github.com/swiftlang/swift-syntax from cache (0.87s)
Computing version for https://github.com/pointfreeco/swift-custom-dump
Computed https://github.com/pointfreeco/swift-custom-dump at 1.3.3 (0.94s)
Fetching https://github.com/pointfreeco/xctest-dynamic-overlay from cache
Fetched https://github.com/pointfreeco/xctest-dynamic-overlay from cache (0.40s)
Computing version for https://github.com/swiftlang/swift-syntax
Computed https://github.com/swiftlang/swift-syntax at 601.0.1 (0.46s)
Computing version for https://github.com/pointfreeco/xctest-dynamic-overlay
Computed https://github.com/pointfreeco/xctest-dynamic-overlay at 1.5.2 (0.04s)
Creating working copy for https://github.com/bradhowes/ArrowView.git
Working copy of https://github.com/bradhowes/ArrowView.git resolved at main (91d194c)
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/pointfreeco/swift-snapshot-testing.git
Working copy of https://github.com/pointfreeco/swift-snapshot-testing.git resolved at 1.18.3
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
warning: '.resolve-product-dependencies': dependency 'arrowview' is not used by any target
Found 1 product dependencies
  - swift-snapshot-testing
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/bradhowes/ArrowView.git
https://github.com/bradhowes/ArrowView.git
{
  "dependencies" : [
    {
      "identity" : "swift-snapshot-testing",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.9.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/pointfreeco/swift-snapshot-testing.git"
    }
  ],
  "manifest_display_name" : "ArrowView",
  "name" : "ArrowView",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "12.0"
    }
  ],
  "products" : [
    {
      "name" : "ArrowView",
      "targets" : [
        "ArrowView"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ArrowViewTests",
      "module_type" : "SwiftTarget",
      "name" : "ArrowViewTests",
      "path" : "Tests/ArrowViewTests",
      "product_dependencies" : [
        "SnapshotTesting"
      ],
      "sources" : [
        "ArrowViewTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "ArrowView"
      ],
      "type" : "test"
    },
    {
      "c99name" : "ArrowView",
      "module_type" : "SwiftTarget",
      "name" : "ArrowView",
      "path" : "Sources/ArrowView",
      "product_memberships" : [
        "ArrowView"
      ],
      "sources" : [
        "ArrowView.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-2F0A5646E1D333AE.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[3/4] Emitting module ArrowView
/Users/admin/builder/spi-builder-workspace/Sources/ArrowView/ArrowView.swift:3:8: error: no such module 'UIKit'
  1 | // Copyright © 2021 Brad Howes. All rights reserved.
  2 |
  3 | import UIKit
    |        `- error: no such module 'UIKit'
  4 |
  5 | /**
[4/4] Compiling ArrowView ArrowView.swift
/Users/admin/builder/spi-builder-workspace/Sources/ArrowView/ArrowView.swift:3:8: error: no such module 'UIKit'
  1 | // Copyright © 2021 Brad Howes. All rights reserved.
  2 |
  3 | import UIKit
    |        `- error: no such module 'UIKit'
  4 |
  5 | /**
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-2F0A5646E1D333AE.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[2/3] Emitting module ArrowView
/Users/admin/builder/spi-builder-workspace/Sources/ArrowView/ArrowView.swift:3:8: error: no such module 'UIKit'
  1 | // Copyright © 2021 Brad Howes. All rights reserved.
  2 |
  3 | import UIKit
    |        `- error: no such module 'UIKit'
  4 |
  5 | /**
[3/3] Compiling ArrowView ArrowView.swift
/Users/admin/builder/spi-builder-workspace/Sources/ArrowView/ArrowView.swift:3:8: error: no such module 'UIKit'
  1 | // Copyright © 2021 Brad Howes. All rights reserved.
  2 |
  3 | import UIKit
    |        `- error: no such module 'UIKit'
  4 |
  5 | /**
BUILD FAILURE 6.1 macosSpm