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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 CSV, reference master (3a4a90), with Swift 6.1 for Linux on 26 Apr 2025 16:22:07 UTC.

Swift 6 data race errors: 2

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/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/skelpo/csv.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/skelpo/csv
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 3a4a903 Merge pull request #16 from skelpo/doc-update
Cloned https://github.com/skelpo/csv.git
Revision (git rev-parse @):
3a4a9034709f4df27a346fc3a70c4a3edac0561f
SUCCESS checkout https://github.com/skelpo/csv.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/skelpo/csv.git
https://github.com/skelpo/csv.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "CSV",
  "name" : "CSV",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "CSV",
      "targets" : [
        "CSV"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CSVTests",
      "module_type" : "SwiftTarget",
      "name" : "CSVTests",
      "path" : "Tests/CSVTests",
      "sources" : [
        "Data.swift",
        "DecoderTests.swift",
        "EncoderTests.swift",
        "ParserTests.swift",
        "SerializerTests.swift",
        "StressTests.swift",
        "UtilityTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "CSV"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CSV",
      "module_type" : "SwiftTarget",
      "name" : "CSV",
      "path" : "Sources/CSV",
      "product_memberships" : [
        "CSV"
      ],
      "sources" : [
        "Coder/CSVCoder.swift",
        "Coder/CodingOptions.swift",
        "Coder/Data+Number.swift",
        "Coder/Decoder/AsyncDecoder.swift",
        "Coder/Decoder/AsyncKeyedDecoder.swift",
        "Coder/Decoder/AsyncSingleValueDecoder.swift",
        "Coder/Encoder/AsyncEncoder.swift",
        "Coder/Encoder/AsyncKeyedEncoder.swift",
        "Coder/Encoder/AsyncSingleValueEncoder.swift",
        "Coder/Encoder/AsyncUnkeyedEncoder.swift",
        "Config.swift",
        "Parser.swift",
        "Seralizer.swift",
        "Utilities.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/host -w "$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
[3/16] Compiling CSV Seralizer.swift
[4/16] Compiling CSV Config.swift
/host/spi-builder-workspace/Sources/CSV/Config.swift:17:23: warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'Config' may have shared mutable state; this is an error in the Swift 6 language mode
 5 | /// to allow for separators other than comma or string delimiters
 6 | /// like quotation marks
 7 | public struct Config {
   |               `- note: consider making struct 'Config' conform to the 'Sendable' protocol
 8 |
 9 |     /// The character that separates one cell from another.
   :
15 |     /// The deault `Config` instance that uses commas for cell separators and double quotes
16 |     /// for cell delimiters.
17 |     public static let `default`: Config = Config(cellSeparator: 44, cellDelimiter: 34)
   |                       |- warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'Config' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: add '@MainActor' to make static property 'default' part of global actor 'MainActor'
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
18 |
19 |     /// Creates a new `Config` instance
[5/16] Compiling CSV Parser.swift
/host/spi-builder-workspace/Sources/CSV/Config.swift:17:23: warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'Config' may have shared mutable state; this is an error in the Swift 6 language mode
 5 | /// to allow for separators other than comma or string delimiters
 6 | /// like quotation marks
 7 | public struct Config {
   |               `- note: consider making struct 'Config' conform to the 'Sendable' protocol
 8 |
 9 |     /// The character that separates one cell from another.
   :
15 |     /// The deault `Config` instance that uses commas for cell separators and double quotes
16 |     /// for cell delimiters.
17 |     public static let `default`: Config = Config(cellSeparator: 44, cellDelimiter: 34)
   |                       |- warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'Config' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: add '@MainActor' to make static property 'default' part of global actor 'MainActor'
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
18 |
19 |     /// Creates a new `Config` instance
[6/17] Compiling CSV Utilities.swift
[7/17] Compiling CSV AsyncSingleValueEncoder.swift
[8/17] Compiling CSV AsyncUnkeyedEncoder.swift
[9/17] Compiling CSV AsyncEncoder.swift
[10/17] Compiling CSV AsyncKeyedEncoder.swift
[11/17] Emitting module CSV
/host/spi-builder-workspace/Sources/CSV/Coder/CodingOptions.swift:9:23: warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'CSVCodingOptions' may have shared mutable state; this is an error in the Swift 6 language mode
  1 | /// The options used for encoding/decoding certin types in the `CSVEncoder` and `CSVDecoder`.
  2 | public final class CSVCodingOptions {
    |                    `- note: class 'CSVCodingOptions' does not conform to the 'Sendable' protocol
  3 |
  4 |     /// The default coding options.
    :
  7 |     /// the `NilCodingStrategy`. This means `Bool` will be represented the value's textual name
  8 |     /// and `nil` will be an empty cell.
  9 |     public static let `default` = CSVCodingOptions(boolCodingStrategy: .string, nilCodingStrategy: .blank)
    |                       |- warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'CSVCodingOptions' may have shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: add '@MainActor' to make static property 'default' part of global actor 'MainActor'
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 10 |
 11 |     /// The bool encoding/decoding strategy used for the encoder/decoder the option set is passed to.
/host/spi-builder-workspace/Sources/CSV/Config.swift:17:23: warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'Config' may have shared mutable state; this is an error in the Swift 6 language mode
 5 | /// to allow for separators other than comma or string delimiters
 6 | /// like quotation marks
 7 | public struct Config {
   |               `- note: consider making struct 'Config' conform to the 'Sendable' protocol
 8 |
 9 |     /// The character that separates one cell from another.
   :
15 |     /// The deault `Config` instance that uses commas for cell separators and double quotes
16 |     /// for cell delimiters.
17 |     public static let `default`: Config = Config(cellSeparator: 44, cellDelimiter: 34)
   |                       |- warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'Config' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: add '@MainActor' to make static property 'default' part of global actor 'MainActor'
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
18 |
19 |     /// Creates a new `Config` instance
[12/17] Compiling CSV Data+Number.swift
[13/17] Compiling CSV AsyncDecoder.swift
[14/17] Compiling CSV AsyncKeyedDecoder.swift
[15/17] Compiling CSV AsyncSingleValueDecoder.swift
[16/17] Compiling CSV CSVCoder.swift
/host/spi-builder-workspace/Sources/CSV/Coder/CodingOptions.swift:9:23: warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'CSVCodingOptions' may have shared mutable state; this is an error in the Swift 6 language mode
  1 | /// The options used for encoding/decoding certin types in the `CSVEncoder` and `CSVDecoder`.
  2 | public final class CSVCodingOptions {
    |                    `- note: class 'CSVCodingOptions' does not conform to the 'Sendable' protocol
  3 |
  4 |     /// The default coding options.
    :
  7 |     /// the `NilCodingStrategy`. This means `Bool` will be represented the value's textual name
  8 |     /// and `nil` will be an empty cell.
  9 |     public static let `default` = CSVCodingOptions(boolCodingStrategy: .string, nilCodingStrategy: .blank)
    |                       |- warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'CSVCodingOptions' may have shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: add '@MainActor' to make static property 'default' part of global actor 'MainActor'
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 10 |
 11 |     /// The bool encoding/decoding strategy used for the encoder/decoder the option set is passed to.
[17/17] Compiling CSV CodingOptions.swift
/host/spi-builder-workspace/Sources/CSV/Coder/CodingOptions.swift:9:23: warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'CSVCodingOptions' may have shared mutable state; this is an error in the Swift 6 language mode
  1 | /// The options used for encoding/decoding certin types in the `CSVEncoder` and `CSVDecoder`.
  2 | public final class CSVCodingOptions {
    |                    `- note: class 'CSVCodingOptions' does not conform to the 'Sendable' protocol
  3 |
  4 |     /// The default coding options.
    :
  7 |     /// the `NilCodingStrategy`. This means `Bool` will be represented the value's textual name
  8 |     /// and `nil` will be an empty cell.
  9 |     public static let `default` = CSVCodingOptions(boolCodingStrategy: .string, nilCodingStrategy: .blank)
    |                       |- warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'CSVCodingOptions' may have shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: add '@MainActor' to make static property 'default' part of global actor 'MainActor'
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 10 |
 11 |     /// The bool encoding/decoding strategy used for the encoder/decoder the option set is passed to.
Build complete! (7.11s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "CSV",
  "name" : "CSV",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "CSV",
      "targets" : [
        "CSV"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CSVTests",
      "module_type" : "SwiftTarget",
      "name" : "CSVTests",
      "path" : "Tests/CSVTests",
      "sources" : [
        "Data.swift",
        "DecoderTests.swift",
        "EncoderTests.swift",
        "ParserTests.swift",
        "SerializerTests.swift",
        "StressTests.swift",
        "UtilityTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "CSV"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CSV",
      "module_type" : "SwiftTarget",
      "name" : "CSV",
      "path" : "Sources/CSV",
      "product_memberships" : [
        "CSV"
      ],
      "sources" : [
        "Coder/CSVCoder.swift",
        "Coder/CodingOptions.swift",
        "Coder/Data+Number.swift",
        "Coder/Decoder/AsyncDecoder.swift",
        "Coder/Decoder/AsyncKeyedDecoder.swift",
        "Coder/Decoder/AsyncSingleValueDecoder.swift",
        "Coder/Encoder/AsyncEncoder.swift",
        "Coder/Encoder/AsyncKeyedEncoder.swift",
        "Coder/Encoder/AsyncSingleValueEncoder.swift",
        "Coder/Encoder/AsyncUnkeyedEncoder.swift",
        "Config.swift",
        "Parser.swift",
        "Seralizer.swift",
        "Utilities.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.