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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 GPX with Swift 6.0 for Linux.

Swift 6 data race errors: 2

Build Command

bash -c docker run --rm -v "checkouts-4606859-0":/host -w "$workDir" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.40.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/sammy-SC/GPX.git
Reference: master
Initialized empty Git repository in /host/spi-builder-workspace/.git/
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint:
hint: 	git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint:
hint: 	git branch -m <name>
From https://github.com/sammy-SC/GPX
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at c94934e Bump Swift version number + package version number
Cloned https://github.com/sammy-SC/GPX.git
Revision (git rev-parse @):
c94934e12c7f9f9180cf2d73957a41b477069232
SUCCESS checkout https://github.com/sammy-SC/GPX.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.0
Building package at path:  $workDir
https://github.com/sammy-SC/GPX.git
Running build ...
bash -c docker run --rm -v "checkouts-4606859-0":/host -w "$workDir" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete 2>&1
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/10] Compiling GPX Location.swift
[4/11] Compiling GPX GPXNode.swift
[5/11] Compiling GPX TrackSegment.swift
[6/11] Compiling GPX Root.swift
[7/11] Compiling GPX Track.swift
[8/11] Compiling GPX String+Helpers.swift
[9/11] Emitting module GPX
/host/spi-builder-workspace/Sources/GPX/Date+Helpers.swift:3:13: warning: let 'formatter' is not concurrency-safe because non-'Sendable' type 'DateFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
 1 | import Foundation
 2 |
 3 | private let formatter = DateFormatter()
   |             `- warning: let 'formatter' is not concurrency-safe because non-'Sendable' type 'DateFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
 4 |
 5 | extension Date {
Foundation.DateFormatter:1:12: note: class 'DateFormatter' does not conform to the 'Sendable' protocol
 1 | open class DateFormatter : Formatter {
   |            `- note: class 'DateFormatter' does not conform to the 'Sendable' protocol
 2 |     override public init()
 3 |     required public init?(coder: NSCoder)
/host/spi-builder-workspace/Sources/GPX/Date+Helpers.swift:1:1: warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'Foundation'
 1 | import Foundation
   | `- warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'Foundation'
 2 |
 3 | private let formatter = DateFormatter()
   |             |- 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
 4 |
 5 | extension Date {
/host/spi-builder-workspace/Sources/GPX/Date+Helpers.swift:15:16: warning: static property 'UTC' is not concurrency-safe because non-'Sendable' type 'TimeZone' may have shared mutable state; this is an error in the Swift 6 language mode
13 |
14 | extension TimeZone {
15 |     static let UTC = TimeZone(identifier: "UTC")!
   |                |- warning: static property 'UTC' is not concurrency-safe because non-'Sendable' type 'TimeZone' may have shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: annotate 'UTC' 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
16 | }
17 |
Foundation.TimeZone:1:15: note: struct 'TimeZone' does not conform to the 'Sendable' protocol
 1 | public struct TimeZone : Hashable, Equatable, ReferenceConvertible {
   |               `- note: struct 'TimeZone' does not conform to the 'Sendable' protocol
 2 |     public typealias ReferenceType = NSTimeZone
 3 |     public static var current: TimeZone { get }
[10/11] Compiling GPX Date+Helpers.swift
/host/spi-builder-workspace/Sources/GPX/Date+Helpers.swift:3:13: warning: let 'formatter' is not concurrency-safe because non-'Sendable' type 'DateFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
 1 | import Foundation
 2 |
 3 | private let formatter = DateFormatter()
   |             `- warning: let 'formatter' is not concurrency-safe because non-'Sendable' type 'DateFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
 4 |
 5 | extension Date {
Foundation.DateFormatter:1:12: note: class 'DateFormatter' does not conform to the 'Sendable' protocol
 1 | open class DateFormatter : Formatter {
   |            `- note: class 'DateFormatter' does not conform to the 'Sendable' protocol
 2 |     override public init()
 3 |     required public init?(coder: NSCoder)
/host/spi-builder-workspace/Sources/GPX/Date+Helpers.swift:1:1: warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'Foundation'
 1 | import Foundation
   | `- warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'Foundation'
 2 |
 3 | private let formatter = DateFormatter()
   |             |- 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
 4 |
 5 | extension Date {
/host/spi-builder-workspace/Sources/GPX/Date+Helpers.swift:15:16: warning: static property 'UTC' is not concurrency-safe because non-'Sendable' type 'TimeZone' may have shared mutable state; this is an error in the Swift 6 language mode
13 |
14 | extension TimeZone {
15 |     static let UTC = TimeZone(identifier: "UTC")!
   |                |- warning: static property 'UTC' is not concurrency-safe because non-'Sendable' type 'TimeZone' may have shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: annotate 'UTC' 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
16 | }
17 |
Foundation.TimeZone:1:15: note: struct 'TimeZone' does not conform to the 'Sendable' protocol
 1 | public struct TimeZone : Hashable, Equatable, ReferenceConvertible {
   |               `- note: struct 'TimeZone' does not conform to the 'Sendable' protocol
 2 |     public typealias ReferenceType = NSTimeZone
 3 |     public static var current: TimeZone { get }
[11/11] Compiling GPX TrackedPoint.swift
Build complete! (8.67s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "GPX",
  "name" : "GPX",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "GPX",
      "targets" : [
        "GPX"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "4"
  ],
  "targets" : [
    {
      "c99name" : "GPXTests",
      "module_type" : "SwiftTarget",
      "name" : "GPXTests",
      "path" : "Tests/GPXTests",
      "sources" : [
        "Factories.swift",
        "RootTests.swift",
        "TrackSegmentTests.swift",
        "TrackTests.swift",
        "TrackedPointTests.swift"
      ],
      "target_dependencies" : [
        "GPX"
      ],
      "type" : "test"
    },
    {
      "c99name" : "GPX",
      "module_type" : "SwiftTarget",
      "name" : "GPX",
      "path" : "Sources/GPX",
      "product_memberships" : [
        "GPX"
      ],
      "sources" : [
        "Date+Helpers.swift",
        "GPXNode.swift",
        "Location.swift",
        "Root.swift",
        "String+Helpers.swift",
        "Track.swift",
        "TrackSegment.swift",
        "TrackedPoint.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
Done.
This is a staging environment. For live and up-to-date package information, visit swiftpackageindex.com.