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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 BetterCodable, reference master (2b4a27), with Swift 6.0 for macOS (SPM) on 1 Nov 2024 18:47:50 UTC.

Swift 6 data race errors: 2

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete

Build Log

========================================
RunAll
========================================
Builder version: 4.56.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/marksands/BetterCodable.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/marksands/BetterCodable
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 2b4a27f Adds nested property wrapper example test
Cloned https://github.com/marksands/BetterCodable.git
Revision (git rev-parse @):
2b4a27f03c8fe80f195ac2b6ac1764213406ee89
SUCCESS checkout https://github.com/marksands/BetterCodable.git at master
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
{
  "identity": ".resolve-product-dependencies",
  "name": "resolve-dependencies",
  "url": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "version": "unspecified",
  "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "dependencies": [
    {
      "identity": "bettercodable",
      "name": "BetterCodable",
      "url": "https://github.com/marksands/BetterCodable.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/BetterCodable",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/marksands/BetterCodable.git
[6/592] Fetching bettercodable
Fetched https://github.com/marksands/BetterCodable.git from cache (0.78s)
Creating working copy for https://github.com/marksands/BetterCodable.git
Working copy of https://github.com/marksands/BetterCodable.git resolved at master (2b4a27f)
warning: '.resolve-product-dependencies': dependency 'bettercodable' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/marksands/BetterCodable.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun 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--7754E27361AE5C74.txt
[3/21] Compiling BetterCodable DefaultFalse.swift
[4/21] Compiling BetterCodable DefaultTrue.swift
[5/22] Compiling BetterCodable YearMonthDayStrategy.swift
[6/22] Compiling BetterCodable DefaultEmptyArray.swift
[7/22] Compiling BetterCodable DefaultEmptyDictionary.swift
[8/22] Compiling BetterCodable LosslessArray.swift
[9/22] Compiling BetterCodable LosslessValue.swift
[10/22] Compiling BetterCodable LossyArray.swift
/Users/admin/builder/spi-builder-workspace/Sources/BetterCodable/LossyDictionary.swift:32:40: warning: generic parameter 'Value' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
  5 | /// This is useful if the Dictionary is intended to contain non-optional values.
  6 | @propertyWrapper
  7 | public struct LossyDictionary<Key: Hashable, Value> {
    |                                              `- note: 'Value' previously declared here
  8 |     public var wrappedValue: [Key: Value]
  9 |
    :
 30 |
 31 |     private struct AnyDecodableValue: Decodable {}
 32 |     private struct LossyDecodableValue<Value: Decodable>: Decodable {
    |                                        `- warning: generic parameter 'Value' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 33 |         let value: Value
 34 |
[11/22] Compiling BetterCodable LossyDictionary.swift
/Users/admin/builder/spi-builder-workspace/Sources/BetterCodable/LossyDictionary.swift:32:40: warning: generic parameter 'Value' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
  5 | /// This is useful if the Dictionary is intended to contain non-optional values.
  6 | @propertyWrapper
  7 | public struct LossyDictionary<Key: Hashable, Value> {
    |                                              `- note: 'Value' previously declared here
  8 |     public var wrappedValue: [Key: Value]
  9 |
    :
 30 |
 31 |     private struct AnyDecodableValue: Decodable {}
 32 |     private struct LossyDecodableValue<Value: Decodable>: Decodable {
    |                                        `- warning: generic parameter 'Value' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 33 |         let value: Value
 34 |
[12/22] Compiling BetterCodable DateValue.swift
[13/22] Compiling BetterCodable DefaultCodable.swift
[14/22] Emitting module BetterCodable
/Users/admin/builder/spi-builder-workspace/Sources/BetterCodable/ISO8601WithFractionalSecondsStrategy.swift:13:24: warning: static property 'formatter' is not concurrency-safe because non-'Sendable' type 'ISO8601DateFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
11 | @available(iOS 11.0, tvOS 11.0, watchOS 4.0, macOS 10.13, *)
12 | public struct ISO8601WithFractionalSecondsStrategy: DateValueCodableStrategy {
13 |     private static let formatter: ISO8601DateFormatter = {
   |                        |- warning: static property 'formatter' is not concurrency-safe because non-'Sendable' type 'ISO8601DateFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
   |                        |- note: annotate 'formatter' 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
14 |         let formatter = ISO8601DateFormatter()
15 |         formatter.formatOptions = [.withInternetDateTime, .withFractionalSeconds]
Foundation.ISO8601DateFormatter:2:12: note: class 'ISO8601DateFormatter' does not conform to the 'Sendable' protocol
 1 | @available(macOS 10.12, *)
 2 | open class ISO8601DateFormatter : Formatter, NSSecureCoding {
   |            `- note: class 'ISO8601DateFormatter' does not conform to the 'Sendable' protocol
 3 |     open var timeZone: TimeZone! { get set }
 4 |     open var formatOptions: ISO8601DateFormatter.Options { get set }
/Users/admin/builder/spi-builder-workspace/Sources/BetterCodable/LossyDictionary.swift:32:40: warning: generic parameter 'Value' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
  5 | /// This is useful if the Dictionary is intended to contain non-optional values.
  6 | @propertyWrapper
  7 | public struct LossyDictionary<Key: Hashable, Value> {
    |                                              `- note: 'Value' previously declared here
  8 |     public var wrappedValue: [Key: Value]
  9 |
    :
 30 |
 31 |     private struct AnyDecodableValue: Decodable {}
 32 |     private struct LossyDecodableValue<Value: Decodable>: Decodable {
    |                                        `- warning: generic parameter 'Value' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 33 |         let value: Value
 34 |
[15/22] Compiling BetterCodable Base64Strategy.swift
[16/22] Compiling BetterCodable DataValue.swift
[17/22] Compiling BetterCodable LossyOptional.swift
[18/22] Compiling BetterCodable RFC2822Strategy.swift
[19/22] Compiling BetterCodable RFC3339Strategy.swift
[20/22] Compiling BetterCodable TimestampStrategy.swift
[21/22] Compiling BetterCodable ISO8601Strategy.swift
/Users/admin/builder/spi-builder-workspace/Sources/BetterCodable/ISO8601WithFractionalSecondsStrategy.swift:13:24: warning: static property 'formatter' is not concurrency-safe because non-'Sendable' type 'ISO8601DateFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
11 | @available(iOS 11.0, tvOS 11.0, watchOS 4.0, macOS 10.13, *)
12 | public struct ISO8601WithFractionalSecondsStrategy: DateValueCodableStrategy {
13 |     private static let formatter: ISO8601DateFormatter = {
   |                        |- warning: static property 'formatter' is not concurrency-safe because non-'Sendable' type 'ISO8601DateFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
   |                        |- note: annotate 'formatter' 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
14 |         let formatter = ISO8601DateFormatter()
15 |         formatter.formatOptions = [.withInternetDateTime, .withFractionalSeconds]
Foundation.ISO8601DateFormatter:2:12: note: class 'ISO8601DateFormatter' does not conform to the 'Sendable' protocol
 1 | @available(macOS 10.12, *)
 2 | open class ISO8601DateFormatter : Formatter, NSSecureCoding {
   |            `- note: class 'ISO8601DateFormatter' does not conform to the 'Sendable' protocol
 3 |     open var timeZone: TimeZone! { get set }
 4 |     open var formatOptions: ISO8601DateFormatter.Options { get set }
[22/22] Compiling BetterCodable ISO8601WithFractionalSecondsStrategy.swift
/Users/admin/builder/spi-builder-workspace/Sources/BetterCodable/ISO8601WithFractionalSecondsStrategy.swift:13:24: warning: static property 'formatter' is not concurrency-safe because non-'Sendable' type 'ISO8601DateFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
11 | @available(iOS 11.0, tvOS 11.0, watchOS 4.0, macOS 10.13, *)
12 | public struct ISO8601WithFractionalSecondsStrategy: DateValueCodableStrategy {
13 |     private static let formatter: ISO8601DateFormatter = {
   |                        |- warning: static property 'formatter' is not concurrency-safe because non-'Sendable' type 'ISO8601DateFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
   |                        |- note: annotate 'formatter' 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
14 |         let formatter = ISO8601DateFormatter()
15 |         formatter.formatOptions = [.withInternetDateTime, .withFractionalSeconds]
Foundation.ISO8601DateFormatter:2:12: note: class 'ISO8601DateFormatter' does not conform to the 'Sendable' protocol
 1 | @available(macOS 10.12, *)
 2 | open class ISO8601DateFormatter : Formatter, NSSecureCoding {
   |            `- note: class 'ISO8601DateFormatter' does not conform to the 'Sendable' protocol
 3 |     open var timeZone: TimeZone! { get set }
 4 |     open var formatOptions: ISO8601DateFormatter.Options { get set }
Build complete! (11.80s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "BetterCodable",
  "name" : "BetterCodable",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "10.0"
    },
    {
      "name" : "macos",
      "version" : "10.13"
    },
    {
      "name" : "tvos",
      "version" : "10.0"
    },
    {
      "name" : "watchos",
      "version" : "3.0"
    }
  ],
  "products" : [
    {
      "name" : "BetterCodable",
      "targets" : [
        "BetterCodable"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "5"
  ],
  "targets" : [
    {
      "c99name" : "BetterCodableTests",
      "module_type" : "SwiftTarget",
      "name" : "BetterCodableTests",
      "path" : "Tests/BetterCodableTests",
      "sources" : [
        "DataValueTests.swift",
        "DateValueTests.swift",
        "DefaulEmptyDictionaryTests.swift",
        "DefaultCodableTests.swift",
        "DefaultEmptyArrayTests.swift",
        "DefaultFalseTests.swift",
        "DefaultTrueTests.swift",
        "LosslessArrayTests.swift",
        "LosslessCustomValueTests.swift",
        "LosslessValueTests.swift",
        "LossyArrayTests.swift",
        "LossyDictionaryTests.swift",
        "LossyOptionalTests.swift",
        "RawRepresentableTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "BetterCodable"
      ],
      "type" : "test"
    },
    {
      "c99name" : "BetterCodable",
      "module_type" : "SwiftTarget",
      "name" : "BetterCodable",
      "path" : "Sources/BetterCodable",
      "product_memberships" : [
        "BetterCodable"
      ],
      "sources" : [
        "Base64Strategy.swift",
        "DataValue.swift",
        "DateValue.swift",
        "DefaultCodable.swift",
        "DefaultEmptyArray.swift",
        "DefaultEmptyDictionary.swift",
        "DefaultFalse.swift",
        "DefaultTrue.swift",
        "ISO8601Strategy.swift",
        "ISO8601WithFractionalSecondsStrategy.swift",
        "LosslessArray.swift",
        "LosslessValue.swift",
        "LossyArray.swift",
        "LossyDictionary.swift",
        "LossyOptional.swift",
        "RFC2822Strategy.swift",
        "RFC3339Strategy.swift",
        "TimestampStrategy.swift",
        "YearMonthDayStrategy.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.2"
}
Done.