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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 AnyDate 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
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Builder version: 4.40.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/Kawoou/AnyDate.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/Kawoou/AnyDate
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at dd54e6c Update swift badge
Cloned https://github.com/Kawoou/AnyDate.git
Revision (git rev-parse @):
dd54e6c2b2d5bc8ea64f5088ca0e37d34b47bc9f
SUCCESS checkout https://github.com/Kawoou/AnyDate.git at master
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $workDir
https://github.com/Kawoou/AnyDate.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
[3/12] Compiling AnyDate Period.swift
/Users/admin/builder/spi-builder-workspace/Sources/AnyDate/Period.swift:93:13: warning: variable 'newDate' was never mutated; consider changing to 'let' constant
 91 |         let days = day + dayAppend
 92 |
 93 |         var newDate = LocalDate(year: year, month: month + 1, day: days + 1)
    |             `- warning: variable 'newDate' was never mutated; consider changing to 'let' constant
 94 |         self.internalYear = newDate.year
 95 |         self.internalMonth = newDate.month - 1
[4/12] Compiling AnyDate ZonedDateTime.swift
[5/12] Compiling AnyDate LocalTime.swift
[6/12] Compiling AnyDate IntegerExtension.swift
[7/12] Compiling AnyDate LocalDate.swift
[8/12] Compiling AnyDate Instant.swift
/Users/admin/builder/spi-builder-workspace/Sources/AnyDate/Instant.swift:9:20: warning: static property 'minSecond' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
  7 |     internal struct Constant {
  8 |         /// The minimum supported epoch second.
  9 |         static var minSecond: Int64 = -31_557_014_167_219_200
    |                    |- warning: static property 'minSecond' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
    |                    |- note: convert 'minSecond' to a 'let' constant to make 'Sendable' shared state immutable
    |                    |- note: annotate 'minSecond' 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
 10 |
 11 |         /// The maximum supported epoch second.
/Users/admin/builder/spi-builder-workspace/Sources/AnyDate/Instant.swift:12:20: warning: static property 'maxSecond' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
 10 |
 11 |         /// The maximum supported epoch second.
 12 |         static var maxSecond: Int64 = 31_556_889_864_403_199
    |                    |- warning: static property 'maxSecond' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
    |                    |- note: convert 'maxSecond' to a 'let' constant to make 'Sendable' shared state immutable
    |                    |- note: annotate 'maxSecond' 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
 13 |     }
 14 |
[9/12] Compiling AnyDate Clock.swift
[10/12] Emitting module AnyDate
/Users/admin/builder/spi-builder-workspace/Sources/AnyDate/Instant.swift:9:20: warning: static property 'minSecond' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
  7 |     internal struct Constant {
  8 |         /// The minimum supported epoch second.
  9 |         static var minSecond: Int64 = -31_557_014_167_219_200
    |                    |- warning: static property 'minSecond' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
    |                    |- note: convert 'minSecond' to a 'let' constant to make 'Sendable' shared state immutable
    |                    |- note: annotate 'minSecond' 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
 10 |
 11 |         /// The maximum supported epoch second.
/Users/admin/builder/spi-builder-workspace/Sources/AnyDate/Instant.swift:12:20: warning: static property 'maxSecond' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
 10 |
 11 |         /// The maximum supported epoch second.
 12 |         static var maxSecond: Int64 = 31_556_889_864_403_199
    |                    |- warning: static property 'maxSecond' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
    |                    |- note: convert 'maxSecond' to a 'let' constant to make 'Sendable' shared state immutable
    |                    |- note: annotate 'maxSecond' 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
 13 |     }
 14 |
[11/12] Compiling AnyDate LocalDateTime.swift
[12/12] Compiling AnyDate ClockIdentifierName.swift
Build complete! (21.94s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "AnyDate",
  "name" : "AnyDate",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "AnyDate",
      "targets" : [
        "AnyDate"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "4.2",
    "5"
  ],
  "targets" : [
    {
      "c99name" : "AnyDateTests",
      "module_type" : "SwiftTarget",
      "name" : "AnyDateTests",
      "path" : "Tests/AnyDateTests",
      "sources" : [
        "ClockTests.swift",
        "InstantTests.swift",
        "IntegerExtensionTests.swift",
        "LocalDateTests.swift",
        "LocalDateTimeTests.swift",
        "LocalTimeTests.swift",
        "PeriodTests.swift",
        "ZonedDateTimeTests.swift"
      ],
      "target_dependencies" : [
        "AnyDate"
      ],
      "type" : "test"
    },
    {
      "c99name" : "AnyDate",
      "module_type" : "SwiftTarget",
      "name" : "AnyDate",
      "path" : "Sources/AnyDate",
      "product_memberships" : [
        "AnyDate"
      ],
      "sources" : [
        "Clock.swift",
        "ClockIdentifierName.swift",
        "Instant.swift",
        "IntegerExtension.swift",
        "LocalDate.swift",
        "LocalDateTime.swift",
        "LocalTime.swift",
        "Period.swift",
        "ZonedDateTime.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Done.
This is a staging environment. For live and up-to-date package information, visit swiftpackageindex.com.