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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 1.1.2 (e686bb), with Swift 6.1 for macOS (SPM) on 26 Apr 2025 16:26:53 UTC.

Swift 6 data race errors: 2

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -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

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/skelpo/csv.git
Reference: 1.1.2
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/skelpo/csv
 * tag               1.1.2      -> FETCH_HEAD
HEAD is now at e686bbb Merge pull request #15 from skelpo/serializer-column-length-crash
Cloned https://github.com/skelpo/csv.git
Revision (git rev-parse @):
e686bbb1a1ccc5314e154fce3c7d48937158a07c
SUCCESS checkout https://github.com/skelpo/csv.git at 1.1.2
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
{
  "identity": ".resolve-product-dependencies",
  "name": "resolve-dependencies",
  "url": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "version": "unspecified",
  "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "dependencies": [
    {
      "identity": "csv",
      "name": "CSV",
      "url": "https://github.com/skelpo/csv.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/csv",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/skelpo/csv.git
[1/1791] Fetching csv
Fetched https://github.com/skelpo/csv.git from cache (0.93s)
Creating working copy for https://github.com/skelpo/csv.git
Working copy of https://github.com/skelpo/csv.git resolved at 1.1.2 (e686bbb)
warning: '.resolve-product-dependencies': dependency 'csv' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/skelpo/csv.git
https://github.com/skelpo/csv.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "CSV",
  "name" : "CSV",
  "path" : "/Users/admin/builder/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 ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-2F0A5646E1D333AE.txt
[3/16] Compiling CSV Seralizer.swift
[4/16] Compiling CSV Parser.swift
[5/16] Compiling CSV Config.swift
/Users/admin/builder/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 CSVCoder.swift
/Users/admin/builder/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.
[10/17] Compiling CSV CodingOptions.swift
/Users/admin/builder/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.
[11/17] Compiling CSV Data+Number.swift
[12/17] Compiling CSV AsyncDecoder.swift
[13/17] Compiling CSV AsyncKeyedDecoder.swift
[14/17] Compiling CSV AsyncSingleValueDecoder.swift
[15/17] Emitting module CSV
/Users/admin/builder/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.
/Users/admin/builder/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
[16/17] Compiling CSV AsyncEncoder.swift
[17/17] Compiling CSV AsyncKeyedEncoder.swift
Build complete! (4.64s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "CSV",
  "name" : "CSV",
  "path" : "/Users/admin/builder/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"
}
Done.