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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 SPIManifest, reference 1.8.2 (df8dfd), with Swift 6.1 for Linux on 30 Apr 2025 17:57:09 UTC.

Swift 6 data race errors: 3

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-2":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.61.2
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/SwiftPackageIndex/SPIManifest.git
Reference: 1.8.2
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/SwiftPackageIndex/SPIManifest
 * tag               1.8.2      -> FETCH_HEAD
HEAD is now at df8dfd0 Merge pull request #60 from SwiftPackageIndex/release-is-6.1-again
Cloned https://github.com/SwiftPackageIndex/SPIManifest.git
Revision (git rev-parse @):
df8dfd0295c5ec9840c2987f8adec20381243109
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/SwiftPackageIndex/SPIManifest.git at 1.8.2
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/SwiftPackageIndex/SPIManifest.git
https://github.com/SwiftPackageIndex/SPIManifest.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "yams",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "4.0.0",
            "upper_bound" : "6.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/jpsim/Yams.git"
    }
  ],
  "manifest_display_name" : "SPIManifest",
  "name" : "SPIManifest",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "SPIManifest",
      "targets" : [
        "SPIManifest"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SPIManifestTests",
      "module_type" : "SwiftTarget",
      "name" : "SPIManifestTests",
      "path" : "Tests/SPIManifestTests",
      "sources" : [
        "Array+UniquedTests.swift",
        "ManifestTests.swift",
        "RegressionTests.swift",
        "SwiftVersionTests.swift"
      ],
      "target_dependencies" : [
        "SPIManifest"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SPIManifest",
      "module_type" : "SwiftTarget",
      "name" : "SPIManifest",
      "path" : "Sources/SPIManifest",
      "product_dependencies" : [
        "Yams"
      ],
      "product_memberships" : [
        "SPIManifest"
      ],
      "sources" : [
        "Array+Uniqued.swift",
        "Environment.swift",
        "Manifest.swift",
        "ManifestError.swift",
        "Platform.swift",
        "SwiftVersion.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.6"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-2":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures 2>&1
basic-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:3bdcac04179f4ed3e5b8e9dbd6e74bbf5ebc0f4fde48bbaad7d1e5c757e65bcb
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.1-latest
Fetching https://github.com/jpsim/Yams.git
[1/10445] Fetching yams
Fetched https://github.com/jpsim/Yams.git from cache (1.59s)
Computing version for https://github.com/jpsim/Yams.git
Computed https://github.com/jpsim/Yams.git at 5.3.1 (2.08s)
Creating working copy for https://github.com/jpsim/Yams.git
Working copy of https://github.com/jpsim/Yams.git resolved at 5.3.1
Building for debugging...
[0/9] Write sources
[2/9] Compiling writer.c
[3/9] Compiling parser.c
[4/9] Compiling api.c
[5/9] Compiling emitter.c
[6/9] Compiling scanner.c
[7/9] Compiling reader.c
[8/9] Write swift-version-24593BA9C3E375BF.txt
[10/28] Emitting module Yams
[11/30] Compiling Yams YamlError.swift
[12/30] Compiling Yams YamlTagProviding.swift
[13/30] Compiling Yams Resolver.swift
[14/30] Compiling Yams String+Yams.swift
[15/30] Compiling Yams Node.Sequence.swift
[16/30] Compiling Yams Node.swift
[17/30] Compiling Yams Parser.swift
[18/30] Compiling Yams Emitter.swift
[19/30] Compiling Yams Encoder.swift
[20/30] Compiling Yams Mark.swift
[21/30] Compiling Yams Node.Alias.swift
[22/30] Compiling Yams Node.Mapping.swift
[23/30] Compiling Yams Node.Scalar.swift
[24/30] Compiling Yams Tag.swift
[25/30] Compiling Yams YamlAnchorProviding.swift
[26/30] Compiling Yams RedundancyAliasingStrategy.swift
[27/30] Compiling Yams Representer.swift
[28/30] Compiling Yams Anchor.swift
[29/30] Compiling Yams Constructor.swift
[30/30] Compiling Yams Decoder.swift
[32/38] Compiling SPIManifest ManifestError.swift
[33/38] Compiling SPIManifest Platform.swift
[34/38] Compiling SPIManifest SwiftVersion.swift
[35/38] Compiling SPIManifest Environment.swift
/host/spi-builder-workspace/Sources/SPIManifest/Environment.swift:24:16: warning: static property 'live' is not concurrency-safe because non-'Sendable' type 'Environment' may have shared mutable state; this is an error in the Swift 6 language mode
16 |
17 |
18 | struct Environment {
   |        `- note: consider making struct 'Environment' conform to the 'Sendable' protocol
19 |     var fileManager: FileManager
20 | }
   :
22 |
23 | extension Environment {
24 |     static let live: Self = .init(
   |                |- warning: static property 'live' is not concurrency-safe because non-'Sendable' type 'Environment' may have shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: add '@MainActor' to make static property 'live' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
25 |         fileManager: .live
26 |     )
/host/spi-builder-workspace/Sources/SPIManifest/Environment.swift:44:16: warning: static property 'live' is not concurrency-safe because non-'Sendable' type 'FileManager' may have shared mutable state; this is an error in the Swift 6 language mode
30 | // MARK: FileManager
31 |
32 | struct FileManager {
   |        `- note: consider making struct 'FileManager' conform to the 'Sendable' protocol
33 |     var contents: (_ atPath: String) -> Data?
34 |     var createDirectory: (_ path: String,
   :
42 |     var temporaryDirectory: () -> URL
43 |
44 |     static let live: Self = .init(
   |                |- warning: static property 'live' is not concurrency-safe because non-'Sendable' type 'FileManager' may have shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: add '@MainActor' to make static property 'live' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
45 |         contents: Foundation.FileManager.default.contents(atPath:),
46 |         createDirectory: Foundation.FileManager.default
/host/spi-builder-workspace/Sources/SPIManifest/Environment.swift:69:5: warning: var 'Current' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
67 |
68 | #if DEBUG
69 | var Current: Environment = .live
   |     |- warning: var 'Current' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |     |- note: convert 'Current' to a 'let' constant to make 'Sendable' shared state immutable
   |     |- note: add '@MainActor' to make var 'Current' part of global actor 'MainActor'
   |     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
70 | #else
71 | let Current: Environment = .live
[36/38] Compiling SPIManifest Array+Uniqued.swift
[37/38] Emitting module SPIManifest
/host/spi-builder-workspace/Sources/SPIManifest/Environment.swift:24:16: warning: static property 'live' is not concurrency-safe because non-'Sendable' type 'Environment' may have shared mutable state; this is an error in the Swift 6 language mode
16 |
17 |
18 | struct Environment {
   |        `- note: consider making struct 'Environment' conform to the 'Sendable' protocol
19 |     var fileManager: FileManager
20 | }
   :
22 |
23 | extension Environment {
24 |     static let live: Self = .init(
   |                |- warning: static property 'live' is not concurrency-safe because non-'Sendable' type 'Environment' may have shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: add '@MainActor' to make static property 'live' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
25 |         fileManager: .live
26 |     )
/host/spi-builder-workspace/Sources/SPIManifest/Environment.swift:44:16: warning: static property 'live' is not concurrency-safe because non-'Sendable' type 'FileManager' may have shared mutable state; this is an error in the Swift 6 language mode
30 | // MARK: FileManager
31 |
32 | struct FileManager {
   |        `- note: consider making struct 'FileManager' conform to the 'Sendable' protocol
33 |     var contents: (_ atPath: String) -> Data?
34 |     var createDirectory: (_ path: String,
   :
42 |     var temporaryDirectory: () -> URL
43 |
44 |     static let live: Self = .init(
   |                |- warning: static property 'live' is not concurrency-safe because non-'Sendable' type 'FileManager' may have shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: add '@MainActor' to make static property 'live' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
45 |         contents: Foundation.FileManager.default.contents(atPath:),
46 |         createDirectory: Foundation.FileManager.default
/host/spi-builder-workspace/Sources/SPIManifest/Environment.swift:69:5: warning: var 'Current' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
67 |
68 | #if DEBUG
69 | var Current: Environment = .live
   |     |- warning: var 'Current' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |     |- note: convert 'Current' to a 'let' constant to make 'Sendable' shared state immutable
   |     |- note: add '@MainActor' to make var 'Current' part of global actor 'MainActor'
   |     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
70 | #else
71 | let Current: Environment = .live
[38/38] Compiling SPIManifest Manifest.swift
Build complete! (13.96s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "yams",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "4.0.0",
            "upper_bound" : "6.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/jpsim/Yams.git"
    }
  ],
  "manifest_display_name" : "SPIManifest",
  "name" : "SPIManifest",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "SPIManifest",
      "targets" : [
        "SPIManifest"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SPIManifestTests",
      "module_type" : "SwiftTarget",
      "name" : "SPIManifestTests",
      "path" : "Tests/SPIManifestTests",
      "sources" : [
        "Array+UniquedTests.swift",
        "ManifestTests.swift",
        "RegressionTests.swift",
        "SwiftVersionTests.swift"
      ],
      "target_dependencies" : [
        "SPIManifest"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SPIManifest",
      "module_type" : "SwiftTarget",
      "name" : "SPIManifest",
      "path" : "Sources/SPIManifest",
      "product_dependencies" : [
        "Yams"
      ],
      "product_memberships" : [
        "SPIManifest"
      ],
      "sources" : [
        "Array+Uniqued.swift",
        "Environment.swift",
        "Manifest.swift",
        "ManifestError.swift",
        "Platform.swift",
        "SwiftVersion.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.6"
}
basic-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:3bdcac04179f4ed3e5b8e9dbd6e74bbf5ebc0f4fde48bbaad7d1e5c757e65bcb
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.1-latest
Done.