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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 SwiftParse, reference 0.4.0 (56c5be), with Swift 6.1 for macOS (SPM) on 24 Apr 2025 12:47:06 UTC.

Build Command

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

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/mgadda/swift-parse.git
Reference: 0.4.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/mgadda/swift-parse
 * tag               0.4.0      -> FETCH_HEAD
HEAD is now at 56c5beb Merge pull request #7 from mgadda/0.4.0
Cloned https://github.com/mgadda/swift-parse.git
Revision (git rev-parse @):
56c5beb92da9c5b1b6478fc49ffb7dee70c4fc7e
SUCCESS checkout https://github.com/mgadda/swift-parse.git at 0.4.0
========================================
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": "swift-parse",
      "name": "SwiftParse",
      "url": "https://github.com/mgadda/swift-parse.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-parse",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/mgadda/swift-parse.git
[1/541] Fetching swift-parse
Fetched https://github.com/mgadda/swift-parse.git from cache (0.72s)
Creating working copy for https://github.com/mgadda/swift-parse.git
Working copy of https://github.com/mgadda/swift-parse.git resolved at 0.4.0 (56c5beb)
warning: '.resolve-product-dependencies': dependency 'swift-parse' 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/mgadda/swift-parse.git
https://github.com/mgadda/swift-parse.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "SwiftParse",
  "name" : "SwiftParse",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SwiftParse",
      "targets" : [
        "SwiftParse"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SwiftParseTests",
      "module_type" : "SwiftTarget",
      "name" : "SwiftParseTests",
      "path" : "Tests/SwiftParseTests",
      "sources" : [
        "ParserHelpers.swift",
        "ParsersTests.swift",
        "StringParserTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "SwiftParse"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SwiftParse",
      "module_type" : "SwiftTarget",
      "name" : "SwiftParse",
      "path" : "Sources/SwiftParse",
      "product_memberships" : [
        "SwiftParse"
      ],
      "sources" : [
        "Either.swift",
        "Map.swift",
        "Nothing.swift",
        "Operators.swift",
        "OptionalExtensions.swift",
        "Parsers.swift",
        "StringParsers.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
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
[3/10] Compiling SwiftParse Operators.swift
error: emit-module command failed with exit code 1 (use -v to see invocation)
[4/10] Compiling SwiftParse Nothing.swift
[5/10] Compiling SwiftParse Either.swift
[6/10] Emitting module SwiftParse
/Users/admin/builder/spi-builder-workspace/Sources/SwiftParse/Parsers.swift:28:14: warning: stored property 'at' of 'Sendable'-conforming generic struct 'ParseError' has non-sendable type 'AnyCollection<Element>'; this is an error in the Swift 6 language mode
 26 | /// and location of the failure.
 27 | public struct ParseError<Element> : Error {
 28 |   public let at: AnyCollection<Element>
    |              `- warning: stored property 'at' of 'Sendable'-conforming generic struct 'ParseError' has non-sendable type 'AnyCollection<Element>'; this is an error in the Swift 6 language mode
 29 |   public let reason: String?
 30 |   public init(at: AnyCollection<Element>, reason: String? = .none) {
Swift.AnyCollection:1:23: note: generic struct 'AnyCollection' does not conform to the 'Sendable' protocol
1 | @frozen public struct AnyCollection<Element> {
  |                       `- note: generic struct 'AnyCollection' does not conform to the 'Sendable' protocol
2 | }
/Users/admin/builder/spi-builder-workspace/Sources/SwiftParse/Parsers.swift:86:12: error: generic parameter 'InputType' is not used in function signature
 84 | }
 85 |
 86 | func match<InputType: Collection>(range: ClosedRange<InputType.Element>) -> StandardParser<InputType, InputType.Element> {
    |            `- error: generic parameter 'InputType' is not used in function signature
 87 |   return { source in
 88 |     guard let first = source.first else {
[7/10] Compiling SwiftParse OptionalExtensions.swift
[8/10] Compiling SwiftParse StringParsers.swift
[9/10] Compiling SwiftParse Map.swift
[10/10] Compiling SwiftParse Parsers.swift
/Users/admin/builder/spi-builder-workspace/Sources/SwiftParse/Parsers.swift:28:14: warning: stored property 'at' of 'Sendable'-conforming generic struct 'ParseError' has non-sendable type 'AnyCollection<Element>'; this is an error in the Swift 6 language mode
 26 | /// and location of the failure.
 27 | public struct ParseError<Element> : Error {
 28 |   public let at: AnyCollection<Element>
    |              `- warning: stored property 'at' of 'Sendable'-conforming generic struct 'ParseError' has non-sendable type 'AnyCollection<Element>'; this is an error in the Swift 6 language mode
 29 |   public let reason: String?
 30 |   public init(at: AnyCollection<Element>, reason: String? = .none) {
Swift.AnyCollection:1:23: note: generic struct 'AnyCollection' does not conform to the 'Sendable' protocol
1 | @frozen public struct AnyCollection<Element> {
  |                       `- note: generic struct 'AnyCollection' does not conform to the 'Sendable' protocol
2 | }
/Users/admin/builder/spi-builder-workspace/Sources/SwiftParse/Parsers.swift:86:12: error: generic parameter 'InputType' is not used in function signature
 84 | }
 85 |
 86 | func match<InputType: Collection>(range: ClosedRange<InputType.Element>) -> StandardParser<InputType, InputType.Element> {
    |            `- error: generic parameter 'InputType' is not used in function signature
 87 |   return { source in
 88 |     guard let first = source.first else {
<unknown>:0: note: 'success' declared here
/Users/admin/builder/spi-builder-workspace/Sources/SwiftParse/Parsers.swift:463:23: warning: enum case 'success' has one associated value that is a tuple of 2 elements
461 |   return { source in
462 |     switch (left()(source), right()(source)) {
463 |     case let (.success(value, out), .success):
    |                       `- warning: enum case 'success' has one associated value that is a tuple of 2 elements
464 |       return .success((value, out))
465 |     case let (.failure(error), _):
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-2F0A5646E1D333AE.txt
[2/9] Compiling SwiftParse StringParsers.swift
[3/9] Compiling SwiftParse Operators.swift
error: emit-module command failed with exit code 1 (use -v to see invocation)
[4/9] Compiling SwiftParse OptionalExtensions.swift
[5/9] Compiling SwiftParse Nothing.swift
[6/9] Compiling SwiftParse Map.swift
[7/9] Compiling SwiftParse Either.swift
[8/9] Emitting module SwiftParse
/Users/admin/builder/spi-builder-workspace/Sources/SwiftParse/Parsers.swift:28:14: warning: stored property 'at' of 'Sendable'-conforming generic struct 'ParseError' has non-sendable type 'AnyCollection<Element>'; this is an error in the Swift 6 language mode
 26 | /// and location of the failure.
 27 | public struct ParseError<Element> : Error {
 28 |   public let at: AnyCollection<Element>
    |              `- warning: stored property 'at' of 'Sendable'-conforming generic struct 'ParseError' has non-sendable type 'AnyCollection<Element>'; this is an error in the Swift 6 language mode
 29 |   public let reason: String?
 30 |   public init(at: AnyCollection<Element>, reason: String? = .none) {
Swift.AnyCollection:1:23: note: generic struct 'AnyCollection' does not conform to the 'Sendable' protocol
1 | @frozen public struct AnyCollection<Element> {
  |                       `- note: generic struct 'AnyCollection' does not conform to the 'Sendable' protocol
2 | }
/Users/admin/builder/spi-builder-workspace/Sources/SwiftParse/Parsers.swift:86:12: error: generic parameter 'InputType' is not used in function signature
 84 | }
 85 |
 86 | func match<InputType: Collection>(range: ClosedRange<InputType.Element>) -> StandardParser<InputType, InputType.Element> {
    |            `- error: generic parameter 'InputType' is not used in function signature
 87 |   return { source in
 88 |     guard let first = source.first else {
[9/9] Compiling SwiftParse Parsers.swift
/Users/admin/builder/spi-builder-workspace/Sources/SwiftParse/Parsers.swift:28:14: warning: stored property 'at' of 'Sendable'-conforming generic struct 'ParseError' has non-sendable type 'AnyCollection<Element>'; this is an error in the Swift 6 language mode
 26 | /// and location of the failure.
 27 | public struct ParseError<Element> : Error {
 28 |   public let at: AnyCollection<Element>
    |              `- warning: stored property 'at' of 'Sendable'-conforming generic struct 'ParseError' has non-sendable type 'AnyCollection<Element>'; this is an error in the Swift 6 language mode
 29 |   public let reason: String?
 30 |   public init(at: AnyCollection<Element>, reason: String? = .none) {
Swift.AnyCollection:1:23: note: generic struct 'AnyCollection' does not conform to the 'Sendable' protocol
1 | @frozen public struct AnyCollection<Element> {
  |                       `- note: generic struct 'AnyCollection' does not conform to the 'Sendable' protocol
2 | }
/Users/admin/builder/spi-builder-workspace/Sources/SwiftParse/Parsers.swift:86:12: error: generic parameter 'InputType' is not used in function signature
 84 | }
 85 |
 86 | func match<InputType: Collection>(range: ClosedRange<InputType.Element>) -> StandardParser<InputType, InputType.Element> {
    |            `- error: generic parameter 'InputType' is not used in function signature
 87 |   return { source in
 88 |     guard let first = source.first else {
<unknown>:0: note: 'success' declared here
/Users/admin/builder/spi-builder-workspace/Sources/SwiftParse/Parsers.swift:463:23: warning: enum case 'success' has one associated value that is a tuple of 2 elements
461 |   return { source in
462 |     switch (left()(source), right()(source)) {
463 |     case let (.success(value, out), .success):
    |                       `- warning: enum case 'success' has one associated value that is a tuple of 2 elements
464 |       return .success((value, out))
465 |     case let (.failure(error), _):
BUILD FAILURE 6.1 macosSpm