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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

Successful build of Schedule with Swift 6.0 for macOS (SPM).

Swift 6 data race errors: 2

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.3.0.app xcrun --toolchain org.swift.600202405261a swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete

Build Log

========================================
RunAll
========================================
Builder version: 4.40.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/luoxiu/Schedule.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/luoxiu/Schedule
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at e388fca Merge branch 'master' of https://github.com/luoxiu/Schedule
Cloned https://github.com/luoxiu/Schedule.git
Revision (git rev-parse @):
e388fcab1d870f32c0359a414fda81b8e81b98c9
SUCCESS checkout https://github.com/luoxiu/Schedule.git at master
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $workDir
https://github.com/luoxiu/Schedule.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.3.0.app xcrun --toolchain org.swift.600202405261a swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-6F35C1178C84523A.txt
[3/14] Compiling Schedule Task.swift
[4/14] Compiling Schedule RunLoopTask.swift
[5/14] Compiling Schedule TaskCenter.swift
/Users/admin/builder/spi-builder-workspace/Sources/Schedule/TaskCenter.swift:28:13: warning: let '_default' is not concurrency-safe because non-'Sendable' type 'TaskCenter' may have shared mutable state; this is an error in the Swift 6 language mode
 26 | }
 27 |
 28 | private let _default = TaskCenter()
    |             |- warning: let '_default' is not concurrency-safe because non-'Sendable' type 'TaskCenter' may have shared mutable state; this is an error in the Swift 6 language mode
    |             |- note: annotate '_default' with '@MainActor' if property should only be accessed from the main actor
    |             `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 29 |
 30 | /// A task center that enables batch operation.
 31 | open class TaskCenter {
    |            `- note: class 'TaskCenter' does not conform to the 'Sendable' protocol
 32 |
 33 |     private let lock = NSLock()
[6/14] Compiling Schedule Plan.swift
[7/14] Compiling Schedule Time.swift
[8/14] Compiling Schedule Period.swift
/Users/admin/builder/spi-builder-workspace/Sources/Schedule/Period.swift:45:24: warning: static property 'quantifiers' is not concurrency-safe because non-'Sendable' type 'Atomic<[String : Int]>' may have shared mutable state; this is an error in the Swift 6 language mode
 43 |     }
 44 |
 45 |     private static let quantifiers: Atomic<[String: Int]> = Atomic([
    |                        |- warning: static property 'quantifiers' is not concurrency-safe because non-'Sendable' type 'Atomic<[String : Int]>' may have shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: annotate 'quantifiers' with '@MainActor' if property should only be accessed from the main actor
    |                        `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 46 |         "one": 1, "two": 2, "three": 3, "four": 4, "five": 5, "six": 6,
 47 |         "seven": 7, "eight": 8, "nine": 9, "ten": 10, "eleven": 11, "twelve": 12
/Users/admin/builder/spi-builder-workspace/Sources/Schedule/Atomic.swift:4:13: note: generic class 'Atomic' does not conform to the 'Sendable' protocol
 2 |
 3 | /// An atomic box that can read and write the underlying value atomically.
 4 | final class Atomic<T> {
   |             `- note: generic class 'Atomic' does not conform to the 'Sendable' protocol
 5 |
 6 |     private var val: T
[9/15] Compiling Schedule Monthday.swift
[10/15] Emitting module Schedule
/Users/admin/builder/spi-builder-workspace/Sources/Schedule/Period.swift:45:24: warning: static property 'quantifiers' is not concurrency-safe because non-'Sendable' type 'Atomic<[String : Int]>' may have shared mutable state; this is an error in the Swift 6 language mode
 43 |     }
 44 |
 45 |     private static let quantifiers: Atomic<[String: Int]> = Atomic([
    |                        |- warning: static property 'quantifiers' is not concurrency-safe because non-'Sendable' type 'Atomic<[String : Int]>' may have shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: annotate 'quantifiers' with '@MainActor' if property should only be accessed from the main actor
    |                        `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 46 |         "one": 1, "two": 2, "three": 3, "four": 4, "five": 5, "six": 6,
 47 |         "seven": 7, "eight": 8, "nine": 9, "ten": 10, "eleven": 11, "twelve": 12
/Users/admin/builder/spi-builder-workspace/Sources/Schedule/Atomic.swift:4:13: note: generic class 'Atomic' does not conform to the 'Sendable' protocol
 2 |
 3 | /// An atomic box that can read and write the underlying value atomically.
 4 | final class Atomic<T> {
   |             `- note: generic class 'Atomic' does not conform to the 'Sendable' protocol
 5 |
 6 |     private var val: T
/Users/admin/builder/spi-builder-workspace/Sources/Schedule/TaskCenter.swift:28:13: warning: let '_default' is not concurrency-safe because non-'Sendable' type 'TaskCenter' may have shared mutable state; this is an error in the Swift 6 language mode
 26 | }
 27 |
 28 | private let _default = TaskCenter()
    |             |- warning: let '_default' is not concurrency-safe because non-'Sendable' type 'TaskCenter' may have shared mutable state; this is an error in the Swift 6 language mode
    |             |- note: annotate '_default' with '@MainActor' if property should only be accessed from the main actor
    |             `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 29 |
 30 | /// A task center that enables batch operation.
 31 | open class TaskCenter {
    |            `- note: class 'TaskCenter' does not conform to the 'Sendable' protocol
 32 |
 33 |     private let lock = NSLock()
[11/15] Compiling Schedule Atomic.swift
[12/15] Compiling Schedule Bag.swift
[13/15] Compiling Schedule Extensions.swift
[14/15] Compiling Schedule Interval.swift
[15/15] Compiling Schedule Weekday.swift
Build complete! (22.46s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Schedule",
  "name" : "Schedule",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.11"
    },
    {
      "name" : "ios",
      "version" : "9.0"
    },
    {
      "name" : "tvos",
      "version" : "9.0"
    },
    {
      "name" : "watchos",
      "version" : "2.0"
    }
  ],
  "products" : [
    {
      "name" : "Schedule",
      "targets" : [
        "Schedule"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "5"
  ],
  "targets" : [
    {
      "c99name" : "ScheduleTests",
      "module_type" : "SwiftTarget",
      "name" : "ScheduleTests",
      "path" : "Tests/ScheduleTests",
      "sources" : [
        "AtomicTests.swift",
        "BagTests.swift",
        "ExtensionsTests.swift",
        "Helpers.swift",
        "IntervalTests.swift",
        "MonthdayTests.swift",
        "PeriodTests.swift",
        "PlanTests.swift",
        "TaskCenterTests.swift",
        "TaskTests.swift",
        "TimeTests.swift",
        "WeekdayTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Schedule"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Schedule",
      "module_type" : "SwiftTarget",
      "name" : "Schedule",
      "path" : "Sources/Schedule",
      "product_memberships" : [
        "Schedule"
      ],
      "sources" : [
        "Atomic.swift",
        "Bag.swift",
        "Extensions.swift",
        "Interval.swift",
        "Monthday.swift",
        "Period.swift",
        "Plan.swift",
        "RunLoopTask.swift",
        "Task.swift",
        "TaskCenter.swift",
        "Time.swift",
        "Weekday.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Done.
This is a staging environment. For live and up-to-date package information, visit swiftpackageindex.com.