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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 6.0 for macOS (SPM) on 5 May 2025 05:54:06 UTC.

Build Command

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

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 /Users/admin/builder/spi-builder-workspace/.git/
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:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/toastersocks/MultiPicker.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.2.0.app xcrun swift build --arch arm64
Building for debugging...
[0/4] Write sources
[3/4] Write swift-version-5BDAB9E9C0126B9D.txt
[5/15] Compiling Helpers Variadic.swift
[6/15] Emitting module Helpers
[7/15] Compiling Helpers Backport.swift
[8/15] Compiling Helpers Extensions.swift
[9/15] Compiling Helpers Combine+.swift
[10/15] Compiling Helpers PreviewHelpers.swift
[11/15] Compiling Helpers Backports.swift
[12/15] Compiling Flow SupportingTypes.swift
[13/15] Compiling Flow PreviewCode.swift
[14/15] Emitting module Flow
[15/15] Compiling Flow Flow.swift
[16/19] Compiling MultiPicker SupportingTypes.swift
error: emit-module command failed with exit code 1 (use -v to see invocation)
[17/19] Compiling MultiPicker PreviewSupport.swift
[18/19] Emitting module MultiPicker
/Users/admin/builder/spi-builder-workspace/Sources/MultiPicker/MultiPicker.swift:6:8: error: macOS not currently supported
  4 |
  5 | #if os(macOS)
  6 | #error("macOS not currently supported")
    |        `- error: macOS not currently supported
  7 | #endif
  8 |
[19/19] Compiling MultiPicker MultiPicker.swift
/Users/admin/builder/spi-builder-workspace/Sources/MultiPicker/MultiPicker.swift:6:8: error: macOS not currently supported
  4 |
  5 | #if os(macOS)
  6 | #error("macOS not currently supported")
    |        `- error: macOS not currently supported
  7 | #endif
  8 |
/Users/admin/builder/spi-builder-workspace/Sources/MultiPicker/MultiPicker.swift:470:35: error: 'navigationLink' is unavailable in macOS
468 |                         }
469 |                     }
470 |                     .pickerStyle(.navigationLink)
    |                                   `- error: 'navigationLink' is unavailable in macOS
471 |                     #if !os(macOS)
472 |                     //                .pickerStyle(.navigationLink)
SwiftUI.PickerStyle:4:23: note: 'navigationLink' has been explicitly marked unavailable here
2 | @available(macOS, unavailable)
3 | extension PickerStyle where Self == NavigationLinkPickerStyle {
4 |     public static var navigationLink: NavigationLinkPickerStyle { get }
  |                       `- note: 'navigationLink' has been explicitly marked unavailable here
5 | }
/Users/admin/builder/spi-builder-workspace/Sources/MultiPicker/MultiPicker.swift:531:35: error: 'navigationLink' is unavailable in macOS
529 |                         }
530 |                     }
531 |                     .pickerStyle(.navigationLink)
    |                                   `- error: 'navigationLink' is unavailable in macOS
532 | #if !os(macOS)
533 |                     //                .pickerStyle(.navigationLink)
SwiftUI.PickerStyle:4:23: note: 'navigationLink' has been explicitly marked unavailable here
2 | @available(macOS, unavailable)
3 | extension PickerStyle where Self == NavigationLinkPickerStyle {
4 |     public static var navigationLink: NavigationLinkPickerStyle { get }
  |                       `- note: 'navigationLink' has been explicitly marked unavailable here
5 | }
Fetching https://github.com/toastersocks/Flow.git
Fetching https://github.com/toastersocks/Helpers.git
[7/334] Fetching flow
[232/443] Fetching flow, helpers
Fetched https://github.com/toastersocks/Flow.git from cache (0.85s)
Fetched https://github.com/toastersocks/Helpers.git from cache (0.85s)
Computing version for https://github.com/toastersocks/Flow.git
Computed https://github.com/toastersocks/Flow.git at 1.2.3 (0.43s)
Computing version for https://github.com/toastersocks/Helpers.git
Computed https://github.com/toastersocks/Helpers.git at 0.7.0 (3.42s)
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
BUILD FAILURE 6.0 macosSpm