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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 MultiPicker, reference main (2201cb), with Swift 5.9 for Linux on 5 May 2025 05:53:48 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-5.9-latest swift build --triple x86_64-unknown-linux-gnu 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.61.3
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/toastersocks/MultiPicker.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/toastersocks/MultiPicker
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 2201cb0 Fix errors building with Swift compiler versions < 6.0
Cloned https://github.com/toastersocks/MultiPicker.git
Revision (git rev-parse @):
2201cb04de77147778b351b71fcda030fb7ac6a2
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/toastersocks/MultiPicker.git at main
========================================
Build
========================================
Selected platform:         linux
Swift version:             5.9
Building package at path:  $PWD
https://github.com/toastersocks/MultiPicker.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-5.9-latest swift build --triple x86_64-unknown-linux-gnu 2>&1
basic-5.9-latest: Pulling from finestructure/spi-images
Digest: sha256:93fe18f778ec94e026baa8cc68b2ae87de241b204c49ca7a3a12cf55897227aa
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-5.9-latest
Fetching https://github.com/toastersocks/Helpers.git
Fetching https://github.com/toastersocks/Flow.git
[4/334] Fetching flow
[335/443] Fetching flow, helpers
Fetched https://github.com/toastersocks/Helpers.git (0.17s)
Fetched https://github.com/toastersocks/Flow.git (0.17s)
Computing version for https://github.com/toastersocks/Flow.git
Computed https://github.com/toastersocks/Flow.git at 1.2.3 (0.32s)
Computing version for https://github.com/toastersocks/Helpers.git
Computed https://github.com/toastersocks/Helpers.git at 0.7.0 (0.94s)
Creating working copy for https://github.com/toastersocks/Flow.git
Working copy of https://github.com/toastersocks/Flow.git resolved at 1.2.3
Creating working copy for https://github.com/toastersocks/Helpers.git
Working copy of https://github.com/toastersocks/Helpers.git resolved at 0.7.0
Building for debugging...
error: emit-module command failed with exit code 1 (use -v to see invocation)
[1/11] Emitting module Flow
/host/spi-builder-workspace/.build/checkouts/Flow/Sources/Flow/Flow.swift:1:8: error: no such module 'SwiftUI'
import SwiftUI
       ^
error: emit-module command failed with exit code 1 (use -v to see invocation)
[2/11] Emitting module Helpers
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
import SwiftUI
       ^
[3/11] Compiling Helpers Variadic.swift
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
import SwiftUI
       ^
[4/11] Compiling Flow PreviewCode.swift
/host/spi-builder-workspace/.build/checkouts/Flow/Sources/Flow/Flow.swift:1:8: error: no such module 'SwiftUI'
import SwiftUI
       ^
[5/11] Compiling Flow SupportingTypes.swift
/host/spi-builder-workspace/.build/checkouts/Flow/Sources/Flow/Flow.swift:1:8: error: no such module 'SwiftUI'
import SwiftUI
       ^
[6/11] Compiling Helpers Extensions.swift
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
import SwiftUI
       ^
[7/11] Compiling Helpers PreviewHelpers.swift
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
import SwiftUI
       ^
[8/11] Compiling Helpers Backports.swift
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
import SwiftUI
       ^
[9/11] Compiling Helpers Backport.swift
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
import SwiftUI
       ^
[10/11] Compiling Helpers Combine+.swift
/host/spi-builder-workspace/.build/checkouts/Helpers/Sources/Helpers/Backport.swift:8:8: error: no such module 'SwiftUI'
import SwiftUI
       ^
error: fatalError
/host/spi-builder-workspace/.build/checkouts/Flow/Sources/Flow/Flow.swift:1:8: error: no such module 'SwiftUI'
import SwiftUI
       ^
BUILD FAILURE 5.9 linux