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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

Failed to build Lift, reference master (783204), with Swift 6.1 for Linux on 27 Apr 2025 04:50:57 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/iZettle/Lift.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/iZettle/Lift
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 7832047 Merge pull request #43 from iZettle/bump-xcode-versions
Cloned https://github.com/iZettle/Lift.git
Revision (git rev-parse @):
7832047b61eb53b40f7dad003bdc331ec98f2523
SUCCESS checkout https://github.com/iZettle/Lift.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/iZettle/Lift.git
https://github.com/iZettle/Lift.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Lift",
  "name" : "Lift",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Lift",
      "targets" : [
        "Lift"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "LiftTests",
      "module_type" : "SwiftTarget",
      "name" : "LiftTests",
      "path" : "Tests/LiftTests",
      "sources" : [
        "IntegerTests.swift",
        "JarTests.swift"
      ],
      "target_dependencies" : [
        "Lift"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Lift",
      "module_type" : "SwiftTarget",
      "name" : "Lift",
      "path" : "Lift",
      "product_memberships" : [
        "Lift"
      ],
      "sources" : [
        "Jar+Additions.swift",
        "Jar+Array.swift",
        "Jar+Context.swift",
        "Jar+Dictionary.swift",
        "Jar+Expressible.swift",
        "Jar+Object.swift",
        "Jar.swift",
        "JarElement+Primitives.swift",
        "JarElement.swift",
        "LiftError.swift",
        "ValueForKey.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.3"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$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
[3/13] Compiling Lift Jar.swift
[4/14] Compiling Lift LiftError.swift
/host/spi-builder-workspace/Lift/LiftError.swift:21:21: warning: stored property '_context' of 'Sendable'-conforming struct 'LiftError' has non-sendable type '() -> String'; this is an error in the Swift 6 language mode
19 |     /// The context jar. Helpful for debugging.
20 |     public var context: String { return _context() }
21 |     fileprivate let _context: () -> String
   |                     |- warning: stored property '_context' of 'Sendable'-conforming struct 'LiftError' has non-sendable type '() -> String'; this is an error in the Swift 6 language mode
   |                     `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
22 |
23 |     /// The description of the error
error: emit-module command failed with exit code 1 (use -v to see invocation)
[5/14] Compiling Lift Jar+Expressible.swift
[6/14] Compiling Lift Jar+Object.swift
[7/14] Emitting module Lift
/host/spi-builder-workspace/Lift/Jar+Additions.swift:78:1: error: type 'UserDefaults' does not conform to protocol 'ValueForKey'
76 | }
77 |
78 | extension UserDefaults: MutatingValueForKey { }
   | |- error: type 'UserDefaults' does not conform to protocol 'ValueForKey'
   | `- note: add stubs for conformance
79 |
/host/spi-builder-workspace/Lift/ValueForKey.swift:16:10: note: protocol requires function 'value(forKey:)' with type '(String) -> Any?'
14 | ///     let value: Int = UserDefaults.standard["value"]^
15 | public protocol ValueForKey {
16 |     func value(forKey key: String) -> Any?
   |          `- note: protocol requires function 'value(forKey:)' with type '(String) -> Any?'
17 | }
18 |
/host/spi-builder-workspace/Lift/LiftError.swift:21:21: warning: stored property '_context' of 'Sendable'-conforming struct 'LiftError' has non-sendable type '() -> String'; this is an error in the Swift 6 language mode
19 |     /// The context jar. Helpful for debugging.
20 |     public var context: String { return _context() }
21 |     fileprivate let _context: () -> String
   |                     |- warning: stored property '_context' of 'Sendable'-conforming struct 'LiftError' has non-sendable type '() -> String'; this is an error in the Swift 6 language mode
   |                     `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
22 |
23 |     /// The description of the error
[8/14] Compiling Lift Jar+Additions.swift
/host/spi-builder-workspace/Lift/Jar+Additions.swift:78:1: error: type 'UserDefaults' does not conform to protocol 'ValueForKey'
76 | }
77 |
78 | extension UserDefaults: MutatingValueForKey { }
   | |- error: type 'UserDefaults' does not conform to protocol 'ValueForKey'
   | `- note: add stubs for conformance
79 |
/host/spi-builder-workspace/Lift/ValueForKey.swift:16:10: note: protocol requires function 'value(forKey:)' with type '(String) -> Any?'
14 | ///     let value: Int = UserDefaults.standard["value"]^
15 | public protocol ValueForKey {
16 |     func value(forKey key: String) -> Any?
   |          `- note: protocol requires function 'value(forKey:)' with type '(String) -> Any?'
17 | }
18 |
[9/14] Compiling Lift Jar+Array.swift
/host/spi-builder-workspace/Lift/Jar+Additions.swift:78:1: error: type 'UserDefaults' does not conform to protocol 'ValueForKey'
76 | }
77 |
78 | extension UserDefaults: MutatingValueForKey { }
   | |- error: type 'UserDefaults' does not conform to protocol 'ValueForKey'
   | `- note: add stubs for conformance
79 |
/host/spi-builder-workspace/Lift/ValueForKey.swift:16:10: note: protocol requires function 'value(forKey:)' with type '(String) -> Any?'
14 | ///     let value: Int = UserDefaults.standard["value"]^
15 | public protocol ValueForKey {
16 |     func value(forKey key: String) -> Any?
   |          `- note: protocol requires function 'value(forKey:)' with type '(String) -> Any?'
17 | }
18 |
[10/14] Compiling Lift Jar+Context.swift
[11/14] Compiling Lift Jar+Dictionary.swift
[12/14] Compiling Lift JarElement+Primitives.swift
[13/14] Compiling Lift JarElement.swift
[14/14] Compiling Lift ValueForKey.swift
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu 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
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-24593BA9C3E375BF.txt
[2/12] Compiling Lift LiftError.swift
[3/13] Compiling Lift JarElement.swift
[4/13] Compiling Lift Jar+Expressible.swift
[5/13] Compiling Lift Jar+Object.swift
error: emit-module command failed with exit code 1 (use -v to see invocation)
[6/13] Emitting module Lift
/host/spi-builder-workspace/Lift/Jar+Additions.swift:78:1: error: type 'UserDefaults' does not conform to protocol 'ValueForKey'
76 | }
77 |
78 | extension UserDefaults: MutatingValueForKey { }
   | |- error: type 'UserDefaults' does not conform to protocol 'ValueForKey'
   | `- note: add stubs for conformance
79 |
/host/spi-builder-workspace/Lift/ValueForKey.swift:16:10: note: protocol requires function 'value(forKey:)' with type '(String) -> Any?'
14 | ///     let value: Int = UserDefaults.standard["value"]^
15 | public protocol ValueForKey {
16 |     func value(forKey key: String) -> Any?
   |          `- note: protocol requires function 'value(forKey:)' with type '(String) -> Any?'
17 | }
18 |
[7/13] Compiling Lift Jar+Context.swift
[8/13] Compiling Lift Jar+Dictionary.swift
[9/13] Compiling Lift Jar+Additions.swift
/host/spi-builder-workspace/Lift/Jar+Additions.swift:78:1: error: type 'UserDefaults' does not conform to protocol 'ValueForKey'
76 | }
77 |
78 | extension UserDefaults: MutatingValueForKey { }
   | |- error: type 'UserDefaults' does not conform to protocol 'ValueForKey'
   | `- note: add stubs for conformance
79 |
/host/spi-builder-workspace/Lift/ValueForKey.swift:16:10: note: protocol requires function 'value(forKey:)' with type '(String) -> Any?'
14 | ///     let value: Int = UserDefaults.standard["value"]^
15 | public protocol ValueForKey {
16 |     func value(forKey key: String) -> Any?
   |          `- note: protocol requires function 'value(forKey:)' with type '(String) -> Any?'
17 | }
18 |
[10/13] Compiling Lift Jar+Array.swift
/host/spi-builder-workspace/Lift/Jar+Additions.swift:78:1: error: type 'UserDefaults' does not conform to protocol 'ValueForKey'
76 | }
77 |
78 | extension UserDefaults: MutatingValueForKey { }
   | |- error: type 'UserDefaults' does not conform to protocol 'ValueForKey'
   | `- note: add stubs for conformance
79 |
/host/spi-builder-workspace/Lift/ValueForKey.swift:16:10: note: protocol requires function 'value(forKey:)' with type '(String) -> Any?'
14 | ///     let value: Int = UserDefaults.standard["value"]^
15 | public protocol ValueForKey {
16 |     func value(forKey key: String) -> Any?
   |          `- note: protocol requires function 'value(forKey:)' with type '(String) -> Any?'
17 | }
18 |
[11/13] Compiling Lift Jar.swift
[12/13] Compiling Lift JarElement+Primitives.swift
[13/13] Compiling Lift ValueForKey.swift
BUILD FAILURE 6.1 linux