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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 Dependencies, reference master (8cc3c5), with Swift 6.1 for macOS (SPM) on 26 Apr 2025 14:16:23 UTC.

Build Command

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

Build Log

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RunAll
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Builder version: 4.61.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/joshchngs/swift-package-manager-ios.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/joshchngs/swift-package-manager-ios
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 8cc3c5d Merge pull request #5 from thomasburguiere/master
Cloned https://github.com/joshchngs/swift-package-manager-ios.git
Revision (git rev-parse @):
8cc3c5d57c70bc8e61b23d4c5ec9c90ae60fe460
SUCCESS checkout https://github.com/joshchngs/swift-package-manager-ios.git at master
Fetching https://github.com/ReactiveX/RxSwift.git
[1/52676] Fetching rxswift
Fetched https://github.com/ReactiveX/RxSwift.git from cache (3.86s)
Computing version for https://github.com/ReactiveX/RxSwift.git
error: package 'package.swift' is using Swift tools version 3.1.0 which is no longer supported; consider using '// swift-tools-version: 6.1' to specify the current tools version
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/joshchngs/swift-package-manager-ios.git
https://github.com/joshchngs/swift-package-manager-ios.git
warning: 'spi-builder-workspace': Source files for target Dependencies should be located under 'Sources/Dependencies', or a custom sources path can be set with the 'path' property in Package.swift
error: target 'Dependencies' referenced in product 'Dependencies' is empty
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
Updating https://github.com/ReactiveX/RxSwift.git
Updated https://github.com/ReactiveX/RxSwift.git (0.60s)
Computing version for https://github.com/ReactiveX/RxSwift.git
error: package 'package.swift' is using Swift tools version 3.1.0 which is no longer supported; consider using '// swift-tools-version: 6.1' to specify the current tools version
warning: 'spi-builder-workspace': Source files for target Dependencies should be located under 'Sources/Dependencies', or a custom sources path can be set with the 'path' property in Package.swift
error: 'spi-builder-workspace': target 'Dependencies' referenced in product 'Dependencies' is empty
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64
Updating https://github.com/ReactiveX/RxSwift.git
Updated https://github.com/ReactiveX/RxSwift.git (0.57s)
Computing version for https://github.com/ReactiveX/RxSwift.git
error: package 'package.swift' is using Swift tools version 3.1.0 which is no longer supported; consider using '// swift-tools-version: 6.1' to specify the current tools version
warning: 'spi-builder-workspace': Source files for target Dependencies should be located under 'Sources/Dependencies', or a custom sources path can be set with the 'path' property in Package.swift
error: 'spi-builder-workspace': target 'Dependencies' referenced in product 'Dependencies' is empty
BUILD FAILURE 6.1 macosSpm