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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 PrecisionLevelSlider, reference main (3d2421), with Swift 6.0 for macOS (SPM) on 10 Apr 2025 12:50:20 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.2.0.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
========================================
Builder version: 4.60.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/FluidGroup/PrecisionLevelSlider.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/FluidGroup/PrecisionLevelSlider
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 3d24212 Update README.md
Cloned https://github.com/FluidGroup/PrecisionLevelSlider.git
Revision (git rev-parse @):
3d24212a8dc5de6e0a03fe0bd11ca86fcc1990d1
SUCCESS checkout https://github.com/FluidGroup/PrecisionLevelSlider.git at main
Fetching https://github.com/FluidGroup/swiftui-Hosting
[1/225] Fetching swiftui-hosting
Fetched https://github.com/FluidGroup/swiftui-Hosting from cache (0.69s)
Computing version for https://github.com/FluidGroup/swiftui-Hosting
Computed https://github.com/FluidGroup/swiftui-Hosting at 2.0.0 (0.47s)
Creating working copy for https://github.com/FluidGroup/swiftui-Hosting
Working copy of https://github.com/FluidGroup/swiftui-Hosting resolved at 2.0.0
========================================
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": "precisionlevelslider",
      "name": "PrecisionLevelSlider",
      "url": "https://github.com/FluidGroup/PrecisionLevelSlider.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/PrecisionLevelSlider",
      "dependencies": [
        {
          "identity": "swiftui-hosting",
          "name": "swiftui-hosting",
          "url": "https://github.com/FluidGroup/swiftui-Hosting",
          "version": "2.3.0",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swiftui-Hosting",
          "dependencies": [
          ]
        }
      ]
    }
  ]
}
Fetching https://github.com/FluidGroup/PrecisionLevelSlider.git
[1/215] Fetching precisionlevelslider
Fetched https://github.com/FluidGroup/PrecisionLevelSlider.git from cache (1.46s)
Fetching https://github.com/FluidGroup/swiftui-Hosting from cache
Fetched https://github.com/FluidGroup/swiftui-Hosting from cache (0.46s)
Computing version for https://github.com/FluidGroup/swiftui-Hosting
Computed https://github.com/FluidGroup/swiftui-Hosting at 2.3.0 (0.03s)
Creating working copy for https://github.com/FluidGroup/swiftui-Hosting
Working copy of https://github.com/FluidGroup/swiftui-Hosting resolved at 2.3.0
Creating working copy for https://github.com/FluidGroup/PrecisionLevelSlider.git
Working copy of https://github.com/FluidGroup/PrecisionLevelSlider.git resolved at main (3d24212)
warning: '.resolve-product-dependencies': dependency 'precisionlevelslider' is not used by any target
Found 1 product dependencies
  - swiftui-hosting
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/FluidGroup/PrecisionLevelSlider.git
https://github.com/FluidGroup/PrecisionLevelSlider.git
{
  "dependencies" : [
    {
      "identity" : "swiftui-hosting",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "2.0.0",
            "upper_bound" : "3.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/FluidGroup/swiftui-Hosting"
    }
  ],
  "manifest_display_name" : "PrecisionLevelSlider",
  "name" : "PrecisionLevelSlider",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "15.0"
    }
  ],
  "products" : [
    {
      "name" : "PrecisionLevelSlider",
      "targets" : [
        "PrecisionLevelSlider"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "PrecisionLevelSlider",
      "module_type" : "SwiftTarget",
      "name" : "PrecisionLevelSlider",
      "path" : "Sources/PrecisionLevelSlider",
      "product_dependencies" : [
        "SwiftUIHosting"
      ],
      "product_memberships" : [
        "PrecisionLevelSlider"
      ],
      "sources" : [
        "PrecisionLevelSlider.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.2.0.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...
[0/3] Write sources
[2/3] Write swift-version-5BDAB9E9C0126B9D.txt
[4/9] Compiling SwiftUIHosting UIResponder+.swift
<unknown>:0: error: upcoming feature 'StrictConcurrency' is already enabled as of Swift version 6
<unknown>:0: error: upcoming feature 'DisableOutwardActorInference' is already enabled as of Swift version 6
<unknown>:0: error: upcoming feature 'GlobalActorIsolatedTypesUsability' is already enabled as of Swift version 6
<unknown>:0: error: upcoming feature 'InferSendableFromCaptures' is already enabled as of Swift version 6
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/UIResponder+.swift:1:8: error: no such module 'UIKit'
 1 | import UIKit
   |        `- error: no such module 'UIKit'
 2 |
 3 | extension UIResponder {
[5/9] Compiling SwiftUIHosting SwiftUIHostingViewController.swift
<unknown>:0: error: upcoming feature 'StrictConcurrency' is already enabled as of Swift version 6
<unknown>:0: error: upcoming feature 'DisableOutwardActorInference' is already enabled as of Swift version 6
<unknown>:0: error: upcoming feature 'GlobalActorIsolatedTypesUsability' is already enabled as of Swift version 6
<unknown>:0: error: upcoming feature 'InferSendableFromCaptures' is already enabled as of Swift version 6
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/UIResponder+.swift:1:8: error: no such module 'UIKit'
 1 | import UIKit
   |        `- error: no such module 'UIKit'
 2 |
 3 | extension UIResponder {
error: emit-module command failed with exit code 1 (use -v to see invocation)
[6/9] Emitting module SwiftUIHosting
<unknown>:0: error: upcoming feature 'StrictConcurrency' is already enabled as of Swift version 6
<unknown>:0: error: upcoming feature 'DisableOutwardActorInference' is already enabled as of Swift version 6
<unknown>:0: error: upcoming feature 'GlobalActorIsolatedTypesUsability' is already enabled as of Swift version 6
<unknown>:0: error: upcoming feature 'InferSendableFromCaptures' is already enabled as of Swift version 6
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/UIResponder+.swift:1:8: error: no such module 'UIKit'
 1 | import UIKit
   |        `- error: no such module 'UIKit'
 2 |
 3 | extension UIResponder {
[7/9] Compiling SwiftUIHosting HostingController.swift
<unknown>:0: error: upcoming feature 'StrictConcurrency' is already enabled as of Swift version 6
<unknown>:0: error: upcoming feature 'DisableOutwardActorInference' is already enabled as of Swift version 6
<unknown>:0: error: upcoming feature 'GlobalActorIsolatedTypesUsability' is already enabled as of Swift version 6
<unknown>:0: error: upcoming feature 'InferSendableFromCaptures' is already enabled as of Swift version 6
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/UIResponder+.swift:1:8: error: no such module 'UIKit'
 1 | import UIKit
   |        `- error: no such module 'UIKit'
 2 |
 3 | extension UIResponder {
[8/9] Compiling SwiftUIHosting SwiftUIHostingView.swift
<unknown>:0: error: upcoming feature 'StrictConcurrency' is already enabled as of Swift version 6
<unknown>:0: error: upcoming feature 'DisableOutwardActorInference' is already enabled as of Swift version 6
<unknown>:0: error: upcoming feature 'GlobalActorIsolatedTypesUsability' is already enabled as of Swift version 6
<unknown>:0: error: upcoming feature 'InferSendableFromCaptures' is already enabled as of Swift version 6
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/UIResponder+.swift:1:8: error: no such module 'UIKit'
 1 | import UIKit
   |        `- error: no such module 'UIKit'
 2 |
 3 | extension UIResponder {
[9/9] Compiling SwiftUIHosting BaseModifier.swift
<unknown>:0: error: upcoming feature 'StrictConcurrency' is already enabled as of Swift version 6
<unknown>:0: error: upcoming feature 'DisableOutwardActorInference' is already enabled as of Swift version 6
<unknown>:0: error: upcoming feature 'GlobalActorIsolatedTypesUsability' is already enabled as of Swift version 6
<unknown>:0: error: upcoming feature 'InferSendableFromCaptures' is already enabled as of Swift version 6
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/UIResponder+.swift:1:8: error: no such module 'UIKit'
 1 | import UIKit
   |        `- error: no such module 'UIKit'
 2 |
 3 | extension UIResponder {
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.2.0.app xcrun swift build --arch arm64
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-5BDAB9E9C0126B9D.txt
[2/7] Compiling SwiftUIHosting UIResponder+.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/UIResponder+.swift:1:8: error: no such module 'UIKit'
 1 | import UIKit
   |        `- error: no such module 'UIKit'
 2 |
 3 | extension UIResponder {
[3/7] Compiling SwiftUIHosting SwiftUIHostingViewController.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/UIResponder+.swift:1:8: error: no such module 'UIKit'
 1 | import UIKit
   |        `- error: no such module 'UIKit'
 2 |
 3 | extension UIResponder {
error: emit-module command failed with exit code 1 (use -v to see invocation)
[4/7] Emitting module SwiftUIHosting
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/UIResponder+.swift:1:8: error: no such module 'UIKit'
 1 | import UIKit
   |        `- error: no such module 'UIKit'
 2 |
 3 | extension UIResponder {
[5/7] Compiling SwiftUIHosting BaseModifier.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/UIResponder+.swift:1:8: error: no such module 'UIKit'
 1 | import UIKit
   |        `- error: no such module 'UIKit'
 2 |
 3 | extension UIResponder {
[6/7] Compiling SwiftUIHosting HostingController.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/UIResponder+.swift:1:8: error: no such module 'UIKit'
 1 | import UIKit
   |        `- error: no such module 'UIKit'
 2 |
 3 | extension UIResponder {
[7/7] Compiling SwiftUIHosting SwiftUIHostingView.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/UIResponder+.swift:1:8: error: no such module 'UIKit'
 1 | import UIKit
   |        `- error: no such module 'UIKit'
 2 |
 3 | extension UIResponder {
BUILD FAILURE 6.0 macosSpm