Swift Package Index

Build Information

Successful build of Prelude, reference 0.6.3 (146f53), with Swift 6.4 for macOS (SPM) on 18 Sep 2026 06:36:15 UTC.

Swift 6 data race errors: 0

Build Command

env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
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Builder version: 5.1.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/wayfair-archive/prelude.git
Reference: 0.6.3
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/wayfair-archive/prelude
 * tag               0.6.3      -> FETCH_HEAD
HEAD is now at 146f53b Fix a version for App Store validation (#27)
Cloned https://github.com/wayfair-archive/prelude.git
Revision (git rev-parse @):
146f53bb562859602e14fa632a71b141970cdbd8
SUCCESS checkout https://github.com/wayfair-archive/prelude.git at 0.6.3
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Build
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Selected platform:         macosSpm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/wayfair-archive/prelude.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64
Building for debugging...
[Planning deferred tasks]
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[20 / 29] Prelude
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[43 / 74]
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[54 / 74]
[65 / 74] Prelude
[66 / 74] Prelude
[71 / 74] Prelude
[73 / 74] Prelude
Build complete! (7.71 sec)
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Laters+Operation.swift:18:20: warning: class 'LaterOperation' must restate inherited '@unchecked Sendable' conformance
16 | }
17 |
18 | public final class LaterOperation<L: Later>: Operation {
   |                    `- warning: class 'LaterOperation' must restate inherited '@unchecked Sendable' conformance
19 |     private let upstream: L
20 |
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Reducers.swift:85:27: warning: generic parameter 'A' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 9 |
10 | /// a struct that wraps a function suitable for passing to the `updateAccumulatingResult:` parameter of `Sequence.reduce(into:_:)`
11 | public struct Reducer<A, X> {
   |                       `- note: 'A' previously declared here
12 |     public let updateAccumulatingResult: (inout A, X) -> Void
13 |
   :
83 |     ///   - rhs: another reducer
84 |     /// - Returns: a reducer that for each input, first runs `lhs`, then runs `rhs`
85 |     public static func <><A, X>(_ lhs: Reducer<A, X>, _ rhs: Reducer<A, X>) -> Reducer<A, X> {
   |                           `- warning: generic parameter 'A' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
86 |         lhs.followed(by: rhs)
87 |     }
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Reducers.swift:85:30: warning: generic parameter 'X' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 9 |
10 | /// a struct that wraps a function suitable for passing to the `updateAccumulatingResult:` parameter of `Sequence.reduce(into:_:)`
11 | public struct Reducer<A, X> {
   |                          `- note: 'X' previously declared here
12 |     public let updateAccumulatingResult: (inout A, X) -> Void
13 |
   :
83 |     ///   - rhs: another reducer
84 |     /// - Returns: a reducer that for each input, first runs `lhs`, then runs `rhs`
85 |     public static func <><A, X>(_ lhs: Reducer<A, X>, _ rhs: Reducer<A, X>) -> Reducer<A, X> {
   |                              `- warning: generic parameter 'X' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
86 |         lhs.followed(by: rhs)
87 |     }
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Reducers.swift:85:27: warning: generic parameter 'A' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 9 |
10 | /// a struct that wraps a function suitable for passing to the `updateAccumulatingResult:` parameter of `Sequence.reduce(into:_:)`
11 | public struct Reducer<A, X> {
   |                       `- note: 'A' previously declared here
12 |     public let updateAccumulatingResult: (inout A, X) -> Void
13 |
   :
83 |     ///   - rhs: another reducer
84 |     /// - Returns: a reducer that for each input, first runs `lhs`, then runs `rhs`
85 |     public static func <><A, X>(_ lhs: Reducer<A, X>, _ rhs: Reducer<A, X>) -> Reducer<A, X> {
   |                           `- warning: generic parameter 'A' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
86 |         lhs.followed(by: rhs)
87 |     }
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Reducers.swift:85:30: warning: generic parameter 'X' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 9 |
10 | /// a struct that wraps a function suitable for passing to the `updateAccumulatingResult:` parameter of `Sequence.reduce(into:_:)`
11 | public struct Reducer<A, X> {
   |                          `- note: 'X' previously declared here
12 |     public let updateAccumulatingResult: (inout A, X) -> Void
13 |
   :
83 |     ///   - rhs: another reducer
84 |     /// - Returns: a reducer that for each input, first runs `lhs`, then runs `rhs`
85 |     public static func <><A, X>(_ lhs: Reducer<A, X>, _ rhs: Reducer<A, X>) -> Reducer<A, X> {
   |                              `- warning: generic parameter 'X' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
86 |         lhs.followed(by: rhs)
87 |     }
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Laters+Operation.swift:18:20: warning: class 'LaterOperation' must restate inherited '@unchecked Sendable' conformance
16 | }
17 |
18 | public final class LaterOperation<L: Later>: Operation {
   |                    `- warning: class 'LaterOperation' must restate inherited '@unchecked Sendable' conformance
19 |     private let upstream: L
20 |
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Laters.swift:387:31: warning: when calling this function in Swift 4 or later, you must pass a '()' tuple; did you mean for the input type to be '()'?
385 |         // Q: When calling this function in Swift 4 or later, you must pass a '()' tuple; did you mean for the input type to be '()'?
386 |         // A: No
387 |         func f(_ v: @escaping (Void) -> Void) {
    |                               `- warning: when calling this function in Swift 4 or later, you must pass a '()' tuple; did you mean for the input type to be '()'?
388 |             upstream { v(()) }
389 |         }
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Prelude",
  "name" : "Prelude",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Prelude",
      "targets" : [
        "Prelude"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "PreludeTests",
      "module_type" : "SwiftTarget",
      "name" : "PreludeTests",
      "path" : "Tests/PreludeTests",
      "sources" : [
        "ChangeTrackingTests.swift",
        "Laters+OperationTests.swift",
        "LatersTests.swift",
        "MonoidTests.swift",
        "PredicateTests.swift",
        "PreludeTests.swift",
        "ReducersTests.swift",
        "RefinementsTests.swift",
        "SequenceExtensionsTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Prelude"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Prelude",
      "module_type" : "SwiftTarget",
      "name" : "Prelude",
      "path" : "Sources/Prelude",
      "product_memberships" : [
        "Prelude"
      ],
      "sources" : [
        "ChangeTracking.swift",
        "Laters+Operation.swift",
        "Laters.swift",
        "Monoid.swift",
        "Nat.swift",
        "Operators.swift",
        "Predicate.swift",
        "Prelude.swift",
        "Reducers.swift",
        "Refinements.swift",
        "Sequence+Prelude.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
Done.