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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 CryptoKitten, reference 0.2.4-swift5 (04c357), with Swift 6.1 for Linux on 25 Apr 2025 10:30:02 UTC.

Swift 6 data race errors: 0

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-3":/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: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/openkitten/cryptokitten.git
Reference: 0.2.4-swift5
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/openkitten/cryptokitten
 * tag               0.2.4-swift5 -> FETCH_HEAD
HEAD is now at 04c357f Swift 5 support
Cloned https://github.com/openkitten/cryptokitten.git
Revision (git rev-parse @):
04c357f2b6780ae966cdd7b339d08a7f63ade384
SUCCESS checkout https://github.com/openkitten/cryptokitten.git at 0.2.4-swift5
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/openkitten/cryptokitten.git
https://github.com/openkitten/cryptokitten.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "CryptoKitten",
  "name" : "CryptoKitten",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "CryptoKitten",
      "targets" : [
        "CryptoKitten"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CryptoKitten",
      "module_type" : "SwiftTarget",
      "name" : "CryptoKitten",
      "path" : "Sources/CryptoKitten",
      "product_memberships" : [
        "CryptoKitten"
      ],
      "sources" : [
        "HMAC.swift",
        "Hash.swift",
        "Helpers.swift",
        "MD5.swift",
        "PBKDF2_HMAC.swift",
        "SHA1.swift",
        "SHA2_32Base.swift",
        "SHA2_32Implementations.swift",
        "SHA2_64Base.swift",
        "SHA2_64Implementations.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-3":/host -w "$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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/12] Compiling CryptoKitten SHA2_32Implementations.swift
/host/spi-builder-workspace/Sources/CryptoKitten/SHA2_32Implementations.swift:11:24: warning: 'deallocate(capacity:)' is deprecated: Swift currently only supports freeing entire heap blocks, use deallocate() instead
  9 |
 10 |     deinit {
 11 |         self.remainder.deallocate(capacity: 63)
    |                        `- warning: 'deallocate(capacity:)' is deprecated: Swift currently only supports freeing entire heap blocks, use deallocate() instead
 12 |     }
 13 |
/host/spi-builder-workspace/Sources/CryptoKitten/SHA2_32Implementations.swift:82:24: warning: 'deallocate(capacity:)' is deprecated: Swift currently only supports freeing entire heap blocks, use deallocate() instead
 80 |
 81 |     deinit {
 82 |         self.remainder.deallocate(capacity: 63)
    |                        `- warning: 'deallocate(capacity:)' is deprecated: Swift currently only supports freeing entire heap blocks, use deallocate() instead
 83 |     }
 84 |
[4/13] Compiling CryptoKitten SHA2_64Base.swift
[5/13] Compiling CryptoKitten SHA2_64Implementations.swift
/host/spi-builder-workspace/Sources/CryptoKitten/SHA2_64Implementations.swift:11:24: warning: 'deallocate(capacity:)' is deprecated: Swift currently only supports freeing entire heap blocks, use deallocate() instead
  9 |
 10 |     deinit {
 11 |         self.remainder.deallocate(capacity: 127)
    |                        `- warning: 'deallocate(capacity:)' is deprecated: Swift currently only supports freeing entire heap blocks, use deallocate() instead
 12 |     }
 13 |
/host/spi-builder-workspace/Sources/CryptoKitten/SHA2_64Implementations.swift:87:24: warning: 'deallocate(capacity:)' is deprecated: Swift currently only supports freeing entire heap blocks, use deallocate() instead
 85 |
 86 |     deinit {
 87 |         self.remainder.deallocate(capacity: 127)
    |                        `- warning: 'deallocate(capacity:)' is deprecated: Swift currently only supports freeing entire heap blocks, use deallocate() instead
 88 |     }
 89 |
[6/13] Compiling CryptoKitten SHA2_32Base.swift
[7/13] Compiling CryptoKitten SHA1.swift
/host/spi-builder-workspace/Sources/CryptoKitten/SHA1.swift:35:24: warning: 'deallocate(capacity:)' is deprecated: Swift currently only supports freeing entire heap blocks, use deallocate() instead
 33 |
 34 |     deinit {
 35 |         self.remainder.deallocate(capacity: 63)
    |                        `- warning: 'deallocate(capacity:)' is deprecated: Swift currently only supports freeing entire heap blocks, use deallocate() instead
 36 |     }
 37 |
[8/13] Compiling CryptoKitten PBKDF2_HMAC.swift
[9/13] Emitting module CryptoKitten
/host/spi-builder-workspace/Sources/CryptoKitten/Helpers.swift:3:61: warning: 'IndexDistance' is deprecated: all index distances are now of type Int
 1 | import Foundation
 2 |
 3 | extension Swift.Collection where Iterator.Element == UInt8, IndexDistance == Int {
   |                                                             `- warning: 'IndexDistance' is deprecated: all index distances are now of type Int
 4 |     /// The 12 bytes represented as 24-character hex-string
 5 |     public var hexString: String {
[10/13] Compiling CryptoKitten HMAC.swift
[11/13] Compiling CryptoKitten Hash.swift
[12/13] Compiling CryptoKitten Helpers.swift
/host/spi-builder-workspace/Sources/CryptoKitten/Helpers.swift:3:61: warning: 'IndexDistance' is deprecated: all index distances are now of type Int
 1 | import Foundation
 2 |
 3 | extension Swift.Collection where Iterator.Element == UInt8, IndexDistance == Int {
   |                                                             `- warning: 'IndexDistance' is deprecated: all index distances are now of type Int
 4 |     /// The 12 bytes represented as 24-character hex-string
 5 |     public var hexString: String {
/host/spi-builder-workspace/Sources/CryptoKitten/MD5.swift:60:24: warning: 'deallocate(capacity:)' is deprecated: Swift currently only supports freeing entire heap blocks, use deallocate() instead
 58 |
 59 |     deinit {
 60 |         self.remainder.deallocate(capacity: 63)
    |                        `- warning: 'deallocate(capacity:)' is deprecated: Swift currently only supports freeing entire heap blocks, use deallocate() instead
 61 |     }
 62 |
/host/spi-builder-workspace/Sources/CryptoKitten/MD5.swift:71:19: warning: 'initialize(to:count:)' is deprecated: renamed to 'initialize(repeating:count:)'
 69 |
 70 |     public init() {
 71 |         remainder.initialize(to: 0, count: 64)
    |                   |- warning: 'initialize(to:count:)' is deprecated: renamed to 'initialize(repeating:count:)'
    |                   `- note: use 'initialize(repeating:count:)' instead
 72 |     }
 73 |
[13/13] Compiling CryptoKitten MD5.swift
/host/spi-builder-workspace/Sources/CryptoKitten/Helpers.swift:3:61: warning: 'IndexDistance' is deprecated: all index distances are now of type Int
 1 | import Foundation
 2 |
 3 | extension Swift.Collection where Iterator.Element == UInt8, IndexDistance == Int {
   |                                                             `- warning: 'IndexDistance' is deprecated: all index distances are now of type Int
 4 |     /// The 12 bytes represented as 24-character hex-string
 5 |     public var hexString: String {
/host/spi-builder-workspace/Sources/CryptoKitten/MD5.swift:60:24: warning: 'deallocate(capacity:)' is deprecated: Swift currently only supports freeing entire heap blocks, use deallocate() instead
 58 |
 59 |     deinit {
 60 |         self.remainder.deallocate(capacity: 63)
    |                        `- warning: 'deallocate(capacity:)' is deprecated: Swift currently only supports freeing entire heap blocks, use deallocate() instead
 61 |     }
 62 |
/host/spi-builder-workspace/Sources/CryptoKitten/MD5.swift:71:19: warning: 'initialize(to:count:)' is deprecated: renamed to 'initialize(repeating:count:)'
 69 |
 70 |     public init() {
 71 |         remainder.initialize(to: 0, count: 64)
    |                   |- warning: 'initialize(to:count:)' is deprecated: renamed to 'initialize(repeating:count:)'
    |                   `- note: use 'initialize(repeating:count:)' instead
 72 |     }
 73 |
Build complete! (7.21s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "CryptoKitten",
  "name" : "CryptoKitten",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "CryptoKitten",
      "targets" : [
        "CryptoKitten"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CryptoKitten",
      "module_type" : "SwiftTarget",
      "name" : "CryptoKitten",
      "path" : "Sources/CryptoKitten",
      "product_memberships" : [
        "CryptoKitten"
      ],
      "sources" : [
        "HMAC.swift",
        "Hash.swift",
        "Helpers.swift",
        "MD5.swift",
        "PBKDF2_HMAC.swift",
        "SHA1.swift",
        "SHA2_32Base.swift",
        "SHA2_32Implementations.swift",
        "SHA2_64Base.swift",
        "SHA2_64Implementations.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
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.