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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 CRDT, reference v0.3.0 (b69d19), with Swift 6.1 for Linux on 27 Apr 2025 09:52:07 UTC.

Swift 6 data race errors: 0

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 -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/bluk/CRDT.git
Reference: v0.3.0
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/bluk/CRDT
 * tag               v0.3.0     -> FETCH_HEAD
HEAD is now at b69d192 Remove merged method requirement on CvRDT
Cloned https://github.com/bluk/CRDT.git
Revision (git rev-parse @):
b69d192cafcc179faa4ad2771087f05bee7a465b
SUCCESS checkout https://github.com/bluk/CRDT.git at v0.3.0
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/bluk/CRDT.git
https://github.com/bluk/CRDT.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "CRDT",
  "name" : "CRDT",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "CRDT",
      "targets" : [
        "CRDT"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "LSEQTests",
      "module_type" : "SwiftTarget",
      "name" : "LSEQTests",
      "path" : "Tests/LSEQTests",
      "sources" : [
        "LSEQTests.swift",
        "PositionAllocatorTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "LSEQ"
      ],
      "type" : "test"
    },
    {
      "c99name" : "LSEQ",
      "module_type" : "SwiftTarget",
      "name" : "LSEQ",
      "path" : "Sources/LSEQ",
      "sources" : [
        "LSEQ.swift",
        "LSEQGenericPosition.swift",
        "LSEQIdentifier16Source16Clock64.swift",
        "LSEQIdentifier32Source16Clock64.swift",
        "LSEQIdentifier64Source64Clock64.swift",
        "Position.swift",
        "PositionIdentifier16Source16Clock64.swift",
        "PositionIdentifier32Source16Clock64.swift",
        "PositionIdentifier64Source64Clock64.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "CRDTTests",
      "module_type" : "SwiftTarget",
      "name" : "CRDTTests",
      "path" : "Tests/CRDTTests",
      "sources" : [
        "PartialOrderableTests.swift",
        "VClockTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "CRDT"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CRDTSetsTests",
      "module_type" : "SwiftTarget",
      "name" : "CRDTSetsTests",
      "path" : "Tests/CRDTSetsTests",
      "sources" : [
        "GSetTests.swift",
        "TwoPhaseSetTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "CRDTSets"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CRDTSets",
      "module_type" : "SwiftTarget",
      "name" : "CRDTSets",
      "path" : "Sources/CRDTSets",
      "sources" : [
        "GSet.swift",
        "TwoPhaseSet.swift"
      ],
      "target_dependencies" : [
        "CRDT"
      ],
      "type" : "library"
    },
    {
      "c99name" : "CRDTRegistersTests",
      "module_type" : "SwiftTarget",
      "name" : "CRDTRegistersTests",
      "path" : "Tests/CRDTRegistersTests",
      "sources" : [
        "ActorDateTimestampTests.swift",
        "ActorLogicalClockTimestampTests.swift",
        "LWWRegisterTests.swift",
        "MVRegisterTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "CRDTRegisters"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CRDTRegisters",
      "module_type" : "SwiftTarget",
      "name" : "CRDTRegisters",
      "path" : "Sources/CRDTRegisters",
      "sources" : [
        "ActorDateTimestamp.swift",
        "ActorLogicalClockTimestamp.swift",
        "LWWRegister.swift",
        "MVRegister.swift"
      ],
      "target_dependencies" : [
        "CRDT"
      ],
      "type" : "library"
    },
    {
      "c99name" : "CRDTCountersTests",
      "module_type" : "SwiftTarget",
      "name" : "CRDTCountersTests",
      "path" : "Tests/CRDTCountersTests",
      "sources" : [
        "GCounterTests.swift",
        "PNCounterTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "CRDTCounters"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CRDTCounters",
      "module_type" : "SwiftTarget",
      "name" : "CRDTCounters",
      "path" : "Sources/CRDTCounters",
      "sources" : [
        "GCounter.swift",
        "PNCounter.swift"
      ],
      "target_dependencies" : [
        "CRDT"
      ],
      "type" : "library"
    },
    {
      "c99name" : "CRDT",
      "module_type" : "SwiftTarget",
      "name" : "CRDT",
      "path" : "Sources/CRDT",
      "product_memberships" : [
        "CRDT"
      ],
      "sources" : [
        "ActorClock.swift",
        "CmRDT.swift",
        "CvRDT.swift",
        "PartialOrderable.swift",
        "VClock.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
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...
[0/6] Write sources
[5/6] Write swift-version-24593BA9C3E375BF.txt
[7/21] Emitting module CRDT
[8/21] Compiling LSEQ PositionIdentifier32Source16Clock64.swift
[9/22] Compiling LSEQ Position.swift
[10/22] Compiling LSEQ PositionIdentifier64Source64Clock64.swift
[11/22] Compiling CRDT PartialOrderable.swift
[12/22] Compiling CRDT VClock.swift
[13/22] Compiling CRDT ActorClock.swift
[14/22] Compiling LSEQ PositionIdentifier16Source16Clock64.swift
[15/22] Compiling CRDT CmRDT.swift
[16/22] Compiling CRDT CvRDT.swift
[17/23] Compiling LSEQ LSEQIdentifier64Source64Clock64.swift
/host/spi-builder-workspace/Sources/LSEQ/LSEQIdentifier64Source64Clock64.swift:61:16: warning: immutable property will not be decoded because it is declared with an initial value which cannot be overwritten
 59 |     }
 60 |
 61 |     public let boundary: PositionType.Segment.Identifier = 10
    |                |- warning: immutable property will not be decoded because it is declared with an initial value which cannot be overwritten
    |                |- note: set the initial value via the initializer or explicitly define a CodingKeys enum including a 'boundary' case to silence this warning
    |                `- note: make the property mutable instead
 62 |     public let source: PositionType.Segment.Source
 63 |     public let startPosition: PositionType
[18/23] Compiling LSEQ LSEQIdentifier32Source16Clock64.swift
/host/spi-builder-workspace/Sources/LSEQ/LSEQIdentifier32Source16Clock64.swift:61:16: warning: immutable property will not be decoded because it is declared with an initial value which cannot be overwritten
 59 |     }
 60 |
 61 |     public let boundary: PositionType.Segment.Identifier = 10
    |                |- warning: immutable property will not be decoded because it is declared with an initial value which cannot be overwritten
    |                |- note: set the initial value via the initializer or explicitly define a CodingKeys enum including a 'boundary' case to silence this warning
    |                `- note: make the property mutable instead
 62 |     public let source: PositionType.Segment.Source
 63 |     public let startPosition: PositionType
[19/23] Compiling LSEQ LSEQ.swift
/host/spi-builder-workspace/Sources/LSEQ/LSEQGenericPosition.swift:60:16: warning: immutable property will not be decoded because it is declared with an initial value which cannot be overwritten
 58 |     }
 59 |
 60 |     public let boundary: PositionType.Segment.Identifier = 10
    |                |- warning: immutable property will not be decoded because it is declared with an initial value which cannot be overwritten
    |                |- note: set the initial value via the initializer or explicitly define a CodingKeys enum including a 'boundary' case to silence this warning
    |                `- note: make the property mutable instead
 61 |     public let source: PositionType.Segment.Source
 62 |     public let startPosition: PositionType
[20/23] Compiling LSEQ LSEQGenericPosition.swift
/host/spi-builder-workspace/Sources/LSEQ/LSEQGenericPosition.swift:60:16: warning: immutable property will not be decoded because it is declared with an initial value which cannot be overwritten
 58 |     }
 59 |
 60 |     public let boundary: PositionType.Segment.Identifier = 10
    |                |- warning: immutable property will not be decoded because it is declared with an initial value which cannot be overwritten
    |                |- note: set the initial value via the initializer or explicitly define a CodingKeys enum including a 'boundary' case to silence this warning
    |                `- note: make the property mutable instead
 61 |     public let source: PositionType.Segment.Source
 62 |     public let startPosition: PositionType
[21/23] Emitting module LSEQ
[22/23] Compiling LSEQ LSEQIdentifier16Source16Clock64.swift
/host/spi-builder-workspace/Sources/LSEQ/LSEQIdentifier16Source16Clock64.swift:61:16: warning: immutable property will not be decoded because it is declared with an initial value which cannot be overwritten
 59 |     }
 60 |
 61 |     public let boundary: PositionType.Segment.Identifier = 10
    |                |- warning: immutable property will not be decoded because it is declared with an initial value which cannot be overwritten
    |                |- note: set the initial value via the initializer or explicitly define a CodingKeys enum including a 'boundary' case to silence this warning
    |                `- note: make the property mutable instead
 62 |     public let source: PositionType.Segment.Source
 63 |     public let startPosition: PositionType
[25/35] Compiling CRDTSets GSet.swift
[26/35] Emitting module CRDTSets
[27/35] Compiling CRDTSets TwoPhaseSet.swift
[28/36] Emitting module CRDTCounters
[29/36] Compiling CRDTCounters GCounter.swift
[31/36] Compiling CRDTCounters PNCounter.swift
[33/37] Compiling CRDTRegisters LWWRegister.swift
[34/37] Compiling CRDTRegisters MVRegister.swift
[35/37] Compiling CRDTRegisters ActorLogicalClockTimestamp.swift
[36/37] Emitting module CRDTRegisters
[37/37] Compiling CRDTRegisters ActorDateTimestamp.swift
Build complete! (17.07s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "CRDT",
  "name" : "CRDT",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "CRDT",
      "targets" : [
        "CRDT"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "LSEQTests",
      "module_type" : "SwiftTarget",
      "name" : "LSEQTests",
      "path" : "Tests/LSEQTests",
      "sources" : [
        "LSEQTests.swift",
        "PositionAllocatorTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "LSEQ"
      ],
      "type" : "test"
    },
    {
      "c99name" : "LSEQ",
      "module_type" : "SwiftTarget",
      "name" : "LSEQ",
      "path" : "Sources/LSEQ",
      "sources" : [
        "LSEQ.swift",
        "LSEQGenericPosition.swift",
        "LSEQIdentifier16Source16Clock64.swift",
        "LSEQIdentifier32Source16Clock64.swift",
        "LSEQIdentifier64Source64Clock64.swift",
        "Position.swift",
        "PositionIdentifier16Source16Clock64.swift",
        "PositionIdentifier32Source16Clock64.swift",
        "PositionIdentifier64Source64Clock64.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "CRDTTests",
      "module_type" : "SwiftTarget",
      "name" : "CRDTTests",
      "path" : "Tests/CRDTTests",
      "sources" : [
        "PartialOrderableTests.swift",
        "VClockTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "CRDT"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CRDTSetsTests",
      "module_type" : "SwiftTarget",
      "name" : "CRDTSetsTests",
      "path" : "Tests/CRDTSetsTests",
      "sources" : [
        "GSetTests.swift",
        "TwoPhaseSetTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "CRDTSets"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CRDTSets",
      "module_type" : "SwiftTarget",
      "name" : "CRDTSets",
      "path" : "Sources/CRDTSets",
      "sources" : [
        "GSet.swift",
        "TwoPhaseSet.swift"
      ],
      "target_dependencies" : [
        "CRDT"
      ],
      "type" : "library"
    },
    {
      "c99name" : "CRDTRegistersTests",
      "module_type" : "SwiftTarget",
      "name" : "CRDTRegistersTests",
      "path" : "Tests/CRDTRegistersTests",
      "sources" : [
        "ActorDateTimestampTests.swift",
        "ActorLogicalClockTimestampTests.swift",
        "LWWRegisterTests.swift",
        "MVRegisterTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "CRDTRegisters"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CRDTRegisters",
      "module_type" : "SwiftTarget",
      "name" : "CRDTRegisters",
      "path" : "Sources/CRDTRegisters",
      "sources" : [
        "ActorDateTimestamp.swift",
        "ActorLogicalClockTimestamp.swift",
        "LWWRegister.swift",
        "MVRegister.swift"
      ],
      "target_dependencies" : [
        "CRDT"
      ],
      "type" : "library"
    },
    {
      "c99name" : "CRDTCountersTests",
      "module_type" : "SwiftTarget",
      "name" : "CRDTCountersTests",
      "path" : "Tests/CRDTCountersTests",
      "sources" : [
        "GCounterTests.swift",
        "PNCounterTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "CRDTCounters"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CRDTCounters",
      "module_type" : "SwiftTarget",
      "name" : "CRDTCounters",
      "path" : "Sources/CRDTCounters",
      "sources" : [
        "GCounter.swift",
        "PNCounter.swift"
      ],
      "target_dependencies" : [
        "CRDT"
      ],
      "type" : "library"
    },
    {
      "c99name" : "CRDT",
      "module_type" : "SwiftTarget",
      "name" : "CRDT",
      "path" : "Sources/CRDT",
      "product_memberships" : [
        "CRDT"
      ],
      "sources" : [
        "ActorClock.swift",
        "CmRDT.swift",
        "CvRDT.swift",
        "PartialOrderable.swift",
        "VClock.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
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.