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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 Linux on 10 Apr 2025 12:49:53 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu 2>&1

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 /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/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
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.0
Building package at path:  $PWD
https://github.com/FluidGroup/PrecisionLevelSlider.git
https://github.com/FluidGroup/PrecisionLevelSlider.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "swiftui-hosting",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "2.0.0",
            "upper_bound" : "3.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/FluidGroup/swiftui-Hosting"
    }
  ],
  "manifest_display_name" : "PrecisionLevelSlider",
  "name" : "PrecisionLevelSlider",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "15.0"
    }
  ],
  "products" : [
    {
      "name" : "PrecisionLevelSlider",
      "targets" : [
        "PrecisionLevelSlider"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "PrecisionLevelSlider",
      "module_type" : "SwiftTarget",
      "name" : "PrecisionLevelSlider",
      "path" : "Sources/PrecisionLevelSlider",
      "product_dependencies" : [
        "SwiftUIHosting"
      ],
      "product_memberships" : [
        "PrecisionLevelSlider"
      ],
      "sources" : [
        "PrecisionLevelSlider.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.0-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-6.0-latest: Pulling from finestructure/spi-images
Digest: sha256:9029076bb687edc160a3d5201c89e92dd9fa7309f33f090c4234365c83366c31
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.0-latest
Fetching https://github.com/FluidGroup/swiftui-Hosting
[1/225] Fetching swiftui-hosting
Fetched https://github.com/FluidGroup/swiftui-Hosting from cache (0.21s)
Computing version for https://github.com/FluidGroup/swiftui-Hosting
Computed https://github.com/FluidGroup/swiftui-Hosting at 2.3.0 (0.48s)
Creating working copy for https://github.com/FluidGroup/swiftui-Hosting
Working copy of https://github.com/FluidGroup/swiftui-Hosting resolved at 2.3.0
Building for debugging...
[0/3] Write sources
[2/3] Write swift-version-24593BA9C3E375BF.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[4/9] 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
/host/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/BaseModifier.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 |
 3 | public struct BaseModifier: ViewModifier {
[5/9] 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
/host/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/BaseModifier.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 |
 3 | public struct BaseModifier: ViewModifier {
[6/9] 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
/host/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/BaseModifier.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 |
 3 | public struct BaseModifier: ViewModifier {
[7/9] 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
/host/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/BaseModifier.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 |
 3 | public struct BaseModifier: ViewModifier {
[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
/host/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/BaseModifier.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 |
 3 | public struct BaseModifier: ViewModifier {
[9/9] 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
/host/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/BaseModifier.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 |
 3 | public struct BaseModifier: ViewModifier {
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu 2>&1
basic-6.0-latest: Pulling from finestructure/spi-images
Digest: sha256:9029076bb687edc160a3d5201c89e92dd9fa7309f33f090c4234365c83366c31
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.0-latest
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-24593BA9C3E375BF.txt
[2/7] Compiling SwiftUIHosting SwiftUIHostingViewController.swift
/host/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/BaseModifier.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 |
 3 | public struct BaseModifier: ViewModifier {
[3/7] Compiling SwiftUIHosting BaseModifier.swift
/host/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/BaseModifier.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 |
 3 | public struct BaseModifier: ViewModifier {
error: emit-module command failed with exit code 1 (use -v to see invocation)
[4/7] Emitting module SwiftUIHosting
/host/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/BaseModifier.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 |
 3 | public struct BaseModifier: ViewModifier {
[5/7] Compiling SwiftUIHosting SwiftUIHostingView.swift
/host/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/BaseModifier.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 |
 3 | public struct BaseModifier: ViewModifier {
[6/7] Compiling SwiftUIHosting UIResponder+.swift
/host/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/BaseModifier.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 |
 3 | public struct BaseModifier: ViewModifier {
[7/7] Compiling SwiftUIHosting HostingController.swift
/host/spi-builder-workspace/.build/checkouts/swiftui-Hosting/Sources/SwiftUIHosting/BaseModifier.swift:1:8: error: no such module 'SwiftUI'
 1 | import SwiftUI
   |        `- error: no such module 'SwiftUI'
 2 |
 3 | public struct BaseModifier: ViewModifier {
BUILD FAILURE 6.0 linux