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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 SunKit, reference main (a18a6f), with Swift 5.9 for macOS (SPM) on 22 Jan 2025 10:59:44 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.2.0.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
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Builder version: 4.60.1
Interrupt handler set up.
========================================
Checkout
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Clone URL: https://github.com/SunKit-Swift/SunKit.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/SunKit-Swift/SunKit
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at a18a6f7 Created SunKit.yml (#56)
Cloned https://github.com/SunKit-Swift/SunKit.git
Revision (git rev-parse @):
a18a6f780770680f4f2ffe3488a1f3b335ec5ff6
SUCCESS checkout https://github.com/SunKit-Swift/SunKit.git at main
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             5.9
Building package at path:  $PWD
https://github.com/SunKit-Swift/SunKit.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.2.0.app xcrun swift build --arch arm64
Building for debugging...
[1/10] Compiling SunKit HMS.swift
[2/11] Compiling SunKit EclipticCoordinates.swift
[3/11] Compiling SunKit DMS.swift
[4/11] Compiling SunKit Angle.swift
[5/11] Compiling SunKit EquatorialCoordinates.swift
[6/11] Compiling SunKit SunElevationEvents.swift
error: emit-module command failed with exit code 1 (use -v to see invocation)
[7/11] Compiling SunKit HorizonCoordinates.swift
[8/11] Compiling SunKit Sun.swift
[9/11] Emitting module SunKit
/Users/admin/builder/spi-builder-workspace/Sources/SunKit/Extensions.swift:22:17: error: unknown attribute 'retroactive'
extension Date: @retroactive Strideable {
                ^
/Users/admin/builder/spi-builder-workspace/Sources/SunKit/Extensions.swift:22:1: error: inheritance from non-protocol type 'any Strideable'
extension Date: @retroactive Strideable {
^
[10/11] Compiling SunKit Extensions.swift
/Users/admin/builder/spi-builder-workspace/Sources/SunKit/Extensions.swift:22:17: error: unknown attribute 'retroactive'
extension Date: @retroactive Strideable {
                ^
/Users/admin/builder/spi-builder-workspace/Sources/SunKit/Extensions.swift:22:1: error: inheritance from non-protocol type 'any Strideable'
extension Date: @retroactive Strideable {
^
[11/11] Compiling SunKit Utils.swift
error: fatalError
BUILD FAILURE 5.9 macosSpm