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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 MainOffender, reference 0.4.0 (8adc74), with Swift 5.9 for macOS (SPM) on 21 Apr 2025 16:58:18 UTC.

Build Command

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

Build Log

========================================
RunAll
========================================
Builder version: 4.60.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/mattmassicotte/MainOffender.git
Reference: 0.4.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/mattmassicotte/MainOffender
 * tag               0.4.0      -> FETCH_HEAD
HEAD is now at 8adc743 Remove hardcoded intend width
Cloned https://github.com/mattmassicotte/MainOffender.git
Revision (git rev-parse @):
8adc74300838c9a105c701e5de998c50edd93387
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/mattmassicotte/MainOffender.git at 0.4.0
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             5.9
Building package at path:  $PWD
https://github.com/mattmassicotte/MainOffender.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.2.0.app xcrun swift build --arch arm64
Building for debugging...
[1/8] Emitting module MainOffender
[2/8] Compiling MainOffender RunLoop+Async.swift
[3/8] Compiling MainOffender MainActor+RunUnsafely.swift
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainActor+RunUnsafely.swift:10:17: error: 'assumeIsolated(_:file:line:)' is only available in macOS 14.0 or newer
                try MainActor.assumeIsolated(body)
                              ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainActor+RunUnsafely.swift:10:17: note: add 'if #available' version check
                try MainActor.assumeIsolated(body)
                              ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainActor+RunUnsafely.swift:3:1: note: add @available attribute to enclosing extension
extension MainActor {
^
[4/8] Compiling MainOffender UndoManager+MainActor.swift
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/UndoManager+MainActor.swift:16:23: error: consecutive statements on a line must be separated by ';'
                        nonisolated(unsafe) let mainTarget = handlerTarget
                                           ^
                                           ;
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/UndoManager+MainActor.swift:16:4: error: cannot find 'nonisolated' in scope
                        nonisolated(unsafe) let mainTarget = handlerTarget
                        ^~~~~~~~~~~
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/UndoManager+MainActor.swift:16:16: error: cannot find 'unsafe' in scope
                        nonisolated(unsafe) let mainTarget = handlerTarget
                                    ^~~~~~
[5/8] Compiling MainOffender ThreadExecutor.swift
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/ThreadExecutor.swift:14:22: error: consecutive statements on a line must be separated by ';'
                nonisolated(unsafe) var context: RunLoopContext? = nil
                                   ^
                                   ;
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/ThreadExecutor.swift:14:3: error: cannot find 'nonisolated' in scope
                nonisolated(unsafe) var context: RunLoopContext? = nil
                ^~~~~~~~~~~
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/ThreadExecutor.swift:14:15: error: cannot find 'unsafe' in scope
                nonisolated(unsafe) var context: RunLoopContext? = nil
                            ^~~~~~
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/ThreadExecutor.swift:32:4: warning: mutation of captured var 'context' in concurrently-executing code; this is an error in Swift 6
                        context = RunLoopContext(runLoop: loop, source: source, thread: thread)
                        ^
[6/8] Compiling MainOffender MainOperationQueue.swift
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainOperationQueue.swift:9:14: error: 'assumeIsolated(_:file:line:)' is only available in macOS 14.0 or newer
                        MainActor.assumeIsolated(block)
                                  ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainOperationQueue.swift:9:14: note: add 'if #available' version check
                        MainActor.assumeIsolated(block)
                                  ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainOperationQueue.swift:7:14: note: add @available attribute to enclosing instance method
        public func addOperation(_ block: @MainActor @escaping @Sendable () -> Void) {
                    ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainOperationQueue.swift:6:20: note: add @available attribute to enclosing class
public final class MainOperationQueue: Sendable {
                   ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainOperationQueue.swift:15:14: error: 'assumeIsolated(_:file:line:)' is only available in macOS 14.0 or newer
                        MainActor.assumeIsolated(barrier)
                                  ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainOperationQueue.swift:15:14: note: add 'if #available' version check
                        MainActor.assumeIsolated(barrier)
                                  ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainOperationQueue.swift:13:14: note: add @available attribute to enclosing instance method
        public func addBarrierBlock(_ barrier: @MainActor @escaping @Sendable () -> Void) {
                    ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainOperationQueue.swift:6:20: note: add @available attribute to enclosing class
public final class MainOperationQueue: Sendable {
                   ^
[7/8] Compiling MainOffender NotificationCenter+Unsafe.swift
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/NotificationCenter+Unsafe.swift:13:23: error: consecutive statements on a line must be separated by ';'
                        nonisolated(unsafe) let mainNotification = notification
                                           ^
                                           ;
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/NotificationCenter+Unsafe.swift:13:4: error: cannot find 'nonisolated' in scope
                        nonisolated(unsafe) let mainNotification = notification
                        ^~~~~~~~~~~
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/NotificationCenter+Unsafe.swift:13:16: error: cannot find 'unsafe' in scope
                        nonisolated(unsafe) let mainNotification = notification
                                    ^~~~~~
[8/8] Compiling MainOffender MainDispatchQueue.swift
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainDispatchQueue.swift:11:14: error: 'assumeIsolated(_:file:line:)' is only available in macOS 14.0 or newer
                        MainActor.assumeIsolated(work)
                                  ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainDispatchQueue.swift:11:14: note: add 'if #available' version check
                        MainActor.assumeIsolated(work)
                                  ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainDispatchQueue.swift:4:14: note: add @available attribute to enclosing instance method
        public func async(
                    ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainDispatchQueue.swift:3:20: note: add @available attribute to enclosing class
public final class MainDispatchQueue: Sendable {
                   ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainDispatchQueue.swift:22:14: error: 'assumeIsolated(_:file:line:)' is only available in macOS 14.0 or newer
                        MainActor.assumeIsolated(work)
                                  ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainDispatchQueue.swift:22:14: note: add 'if #available' version check
                        MainActor.assumeIsolated(work)
                                  ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainDispatchQueue.swift:15:14: note: add @available attribute to enclosing instance method
        public func asyncAfter(
                    ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainDispatchQueue.swift:3:20: note: add @available attribute to enclosing class
public final class MainDispatchQueue: Sendable {
                   ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainDispatchQueue.swift:39:14: error: 'assumeIsolated(_:file:line:)' is only available in macOS 14.0 or newer
                        MainActor.assumeIsolated(work)
                                  ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainDispatchQueue.swift:39:14: note: add 'if #available' version check
                        MainActor.assumeIsolated(work)
                                  ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainDispatchQueue.swift:32:14: note: add @available attribute to enclosing instance method
        public func notify(
                    ^
/Users/admin/builder/spi-builder-workspace/Sources/MainOffender/MainDispatchQueue.swift:31:1: note: add @available attribute to enclosing extension
extension DispatchGroup {
^
error: fatalError
BUILD FAILURE 5.9 macosSpm