swift-chess – Build Information – Swift Package Index

Build Information

Successful build of swift-chess, reference 1.0.8 (14d9d9), with Swift 6.4 for macOS (SPM) on 17 Sep 2026 11:57:03 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
========================================
Builder version: 5.1.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/dpedley/swift-chess.git
Reference: 1.0.8
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/dpedley/swift-chess
 * tag               1.0.8      -> FETCH_HEAD
HEAD is now at 14d9d98 Release prep (#42)
Cloned https://github.com/dpedley/swift-chess.git
Revision (git rev-parse @):
14d9d982c8a509efcfebf696c140b0ec397daf40
SUCCESS checkout https://github.com/dpedley/swift-chess.git at 1.0.8
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/dpedley/swift-chess.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64
Building for debugging...
[Pre-planning 1 / 96]
[Planning deferred tasks]
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Build complete! (12.58 sec)
Fetching https://github.com/apple/swift-log.git
[1/8092] Fetching swift-log
Fetched https://github.com/apple/swift-log.git (1.33s)
Computing version for https://github.com/apple/swift-log.git
Computed https://github.com/apple/swift-log.git at 1.15.1 (1.96s)
Creating working copy for https://github.com/apple/swift-log.git
Working copy of https://github.com/apple/swift-log.git resolved at 1.15.1
warning: 'spi-builder-workspace': Invalid Exclude '/Users/admin/builder/spi-builder-workspace/Sources/Chess/PlayChess': File not found.
warning: 'spi-builder-workspace': Invalid Exclude '/Users/admin/builder/spi-builder-workspace/Sources/Chess/PlayChess': File not found.
/Users/admin/builder/spi-builder-workspace/Sources/Chess/UI/PieceShape+Details.swift:14:13: [1;33mwarning: [1;39mstored property 'artwork' of 'Sendable'-conforming struct 'Details' has non-Sendable type 'PieceArtwork'; this is an error in the Swift 6 language mode[0;0m
[0;36m12 |[0;0m     struct Details: Shape {
[0;36m13 |[0;0m         var inset: CGFloat = 0.1
[0;36m14 |[0;0m         let artwork: PieceArtwork
   [0;36m|[0;0m             `- [1;33mwarning: [1;39mstored property 'artwork' of 'Sendable'-conforming struct 'Details' has non-Sendable type 'PieceArtwork'; this is an error in the Swift 6 language mode[0;0m
[0;36m15 |[0;0m         func path(in rect: CGRect) -> Path {
[0;36m16 |[0;0m             return Path { path in
/Users/admin/builder/spi-builder-workspace/Sources/Chess/UI/PieceArtwork/PieceArtwork.swift:11:15: [1;39mnote: [1;39mconsider making struct 'PieceArtwork' conform to the 'Sendable' protocol[0;0m
 [0;36m9 |[0;0m import SwiftUI
[0;36m10 |[0;0m
[0;36m11 |[0;0m public struct PieceArtwork {
   [0;36m|[0;0m               `- [1;39mnote: [1;39mconsider making struct 'PieceArtwork' conform to the 'Sendable' protocol[0;0m
[0;36m12 |[0;0m     let start: CGPoint
[0;36m13 |[0;0m     let strokes: [Stroke]
/Users/admin/builder/spi-builder-workspace/Sources/Chess/UI/PieceShape.swift:13:9: [1;33mwarning: [1;39mstored property 'artwork' of 'Sendable'-conforming struct 'PieceShape' has non-Sendable type 'PieceArtwork'; this is an error in the Swift 6 language mode[0;0m
[0;36m11 |[0;0m struct PieceShape: Shape {
[0;36m12 |[0;0m     var inset: CGFloat = 0.1
[0;36m13 |[0;0m     let artwork: PieceArtwork
   [0;36m|[0;0m         `- [1;33mwarning: [1;39mstored property 'artwork' of 'Sendable'-conforming struct 'PieceShape' has non-Sendable type 'PieceArtwork'; this is an error in the Swift 6 language mode[0;0m
[0;36m14 |[0;0m     func path(in rect: CGRect) -> Path {
[0;36m15 |[0;0m         return Path { path in
/Users/admin/builder/spi-builder-workspace/Sources/Chess/UI/PieceArtwork/PieceArtwork.swift:11:15: [1;39mnote: [1;39mconsider making struct 'PieceArtwork' conform to the 'Sendable' protocol[0;0m
 [0;36m9 |[0;0m import SwiftUI
[0;36m10 |[0;0m
[0;36m11 |[0;0m public struct PieceArtwork {
   [0;36m|[0;0m               `- [1;39mnote: [1;39mconsider making struct 'PieceArtwork' conform to the 'Sendable' protocol[0;0m
[0;36m12 |[0;0m     let start: CGPoint
[0;36m13 |[0;0m     let strokes: [Stroke]
/Users/admin/builder/spi-builder-workspace/Sources/Chess/UI/Sound.swift:9:43: [1;33mwarning: [1;39musing 'class' keyword to define a class-constrained protocol is deprecated; use 'AnyObject' instead[0;0m [#deprecation]
 [0;36m7 |[0;0m /// The sound is handled outside of this library, but for timing the optional
 [0;36m8 |[0;0m /// methods are included here.
 [0;36m9 |[0;0m public protocol ChessSoundEffectDelegate: class {
   [0;36m|[0;0m                                           `- [1;33mwarning: [1;39musing 'class' keyword to define a class-constrained protocol is deprecated; use 'AnyObject' instead[0;0m [#deprecation]
[0;36m10 |[0;0m     func move()
[0;36m11 |[0;0m     func capture()
/Users/admin/builder/spi-builder-workspace/Sources/Chess/Player/ChessRobot.swift:57:22: [1;33mwarning: [1;39mweak variable 'weakSelf' was never mutated; consider changing to 'let' constant[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/variable-never-mutated\VariableNeverMutated]8;;\::]8;;https://docs.swift.org/compiler/documentation/diagnostics/weak-mutability\WeakMutability]8;;\]
 [0;36m55 |[0;0m             }
 [0;36m56 |[0;0m             let localBoard = game.board
 [0;36m57 |[0;0m             weak var weakSelf = self
    [0;36m|[0;0m                      `- [1;33mwarning: [1;39mweak variable 'weakSelf' was never mutated; consider changing to 'let' constant[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/variable-never-mutated\VariableNeverMutated]8;;\::]8;;https://docs.swift.org/compiler/documentation/diagnostics/weak-mutability\WeakMutability]8;;\]
 [0;36m58 |[0;0m             weak var weakDelegate = delegate
 [0;36m59 |[0;0m             let answerDate = Date(timeIntervalSinceNow: responseDelay)
/Users/admin/builder/spi-builder-workspace/Sources/Chess/Player/ChessRobot.swift:58:22: [1;33mwarning: [1;39mweak variable 'weakDelegate' was never mutated; consider changing to 'let' constant[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/variable-never-mutated\VariableNeverMutated]8;;\::]8;;https://docs.swift.org/compiler/documentation/diagnostics/weak-mutability\WeakMutability]8;;\]
 [0;36m56 |[0;0m             let localBoard = game.board
 [0;36m57 |[0;0m             weak var weakSelf = self
 [0;36m58 |[0;0m             weak var weakDelegate = delegate
    [0;36m|[0;0m                      `- [1;33mwarning: [1;39mweak variable 'weakDelegate' was never mutated; consider changing to 'let' constant[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/variable-never-mutated\VariableNeverMutated]8;;\::]8;;https://docs.swift.org/compiler/documentation/diagnostics/weak-mutability\WeakMutability]8;;\]
 [0;36m59 |[0;0m             let answerDate = Date(timeIntervalSinceNow: responseDelay)
 [0;36m60 |[0;0m             Thread.detachNewThread {
/Users/admin/builder/spi-builder-workspace/Sources/Chess/Player/HumanPlayer.swift:31:26: [1;33mwarning: [1;39mweak variable 'weakDelegate' was never mutated; consider changing to 'let' constant[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/variable-never-mutated\VariableNeverMutated]8;;\::]8;;https://docs.swift.org/compiler/documentation/diagnostics/weak-mutability\WeakMutability]8;;\]
[0;36m29 |[0;0m                 game.delegate?.gameAction(.makeMove(move: move))
[0;36m30 |[0;0m             } else {
[0;36m31 |[0;0m                 weak var weakDelegate = game.delegate
   [0;36m|[0;0m                          `- [1;33mwarning: [1;39mweak variable 'weakDelegate' was never mutated; consider changing to 'let' constant[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/variable-never-mutated\VariableNeverMutated]8;;\::]8;;https://docs.swift.org/compiler/documentation/diagnostics/weak-mutability\WeakMutability]8;;\]
[0;36m32 |[0;0m                 chessBestMoveCallback = { move in
[0;36m33 |[0;0m                     guard let delegate = weakDelegate else { return }
/Users/admin/builder/spi-builder-workspace/Sources/Chess/Robots/MindyMaxBot.swift:47:22: [1;33mwarning: [1;39mweak variable 'weakSelf' was never mutated; consider changing to 'let' constant[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/variable-never-mutated\VariableNeverMutated]8;;\::]8;;https://docs.swift.org/compiler/documentation/diagnostics/weak-mutability\WeakMutability]8;;\]
[0;36m45 |[0;0m             strategist.gameModel = board
[0;36m46 |[0;0m             strategist.randomSource = GKARC4RandomSource()
[0;36m47 |[0;0m             weak var weakSelf = self
   [0;36m|[0;0m                      `- [1;33mwarning: [1;39mweak variable 'weakSelf' was never mutated; consider changing to 'let' constant[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/variable-never-mutated\VariableNeverMutated]8;;\::]8;;https://docs.swift.org/compiler/documentation/diagnostics/weak-mutability\WeakMutability]8;;\]
[0;36m48 |[0;0m             weak var weakDelegate = delegate
[0;36m49 |[0;0m             Thread.detachNewThread {
/Users/admin/builder/spi-builder-workspace/Sources/Chess/Robots/MindyMaxBot.swift:48:22: [1;33mwarning: [1;39mweak variable 'weakDelegate' was never mutated; consider changing to 'let' constant[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/variable-never-mutated\VariableNeverMutated]8;;\::]8;;https://docs.swift.org/compiler/documentation/diagnostics/weak-mutability\WeakMutability]8;;\]
[0;36m46 |[0;0m             strategist.randomSource = GKARC4RandomSource()
[0;36m47 |[0;0m             weak var weakSelf = self
[0;36m48 |[0;0m             weak var weakDelegate = delegate
   [0;36m|[0;0m                      `- [1;33mwarning: [1;39mweak variable 'weakDelegate' was never mutated; consider changing to 'let' constant[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/variable-never-mutated\VariableNeverMutated]8;;\::]8;;https://docs.swift.org/compiler/documentation/diagnostics/weak-mutability\WeakMutability]8;;\]
[0;36m49 |[0;0m             Thread.detachNewThread {
[0;36m50 |[0;0m                 guard let self = weakSelf, let delegate = weakDelegate else { return }
[#VariableNeverMutated]: <https://docs.swift.org/compiler/documentation/diagnostics/variable-never-mutated>
[#WeakMutability]: <https://docs.swift.org/compiler/documentation/diagnostics/weak-mutability>
/Users/admin/builder/spi-builder-workspace/Sources/Chess/UI/PieceShape+Details.swift:14:13: [1;33mwarning: [1;39mstored property 'artwork' of 'Sendable'-conforming struct 'Details' has non-Sendable type 'PieceArtwork'; this is an error in the Swift 6 language mode[0;0m
[0;36m12 |[0;0m     struct Details: Shape {
[0;36m13 |[0;0m         var inset: CGFloat = 0.1
[0;36m14 |[0;0m         let artwork: PieceArtwork
   [0;36m|[0;0m             `- [1;33mwarning: [1;39mstored property 'artwork' of 'Sendable'-conforming struct 'Details' has non-Sendable type 'PieceArtwork'; this is an error in the Swift 6 language mode[0;0m
[0;36m15 |[0;0m         func path(in rect: CGRect) -> Path {
[0;36m16 |[0;0m             return Path { path in
/Users/admin/builder/spi-builder-workspace/Sources/Chess/UI/PieceArtwork/PieceArtwork.swift:11:15: [1;39mnote: [1;39mconsider making struct 'PieceArtwork' conform to the 'Sendable' protocol[0;0m
 [0;36m9 |[0;0m import SwiftUI
[0;36m10 |[0;0m
[0;36m11 |[0;0m public struct PieceArtwork {
   [0;36m|[0;0m               `- [1;39mnote: [1;39mconsider making struct 'PieceArtwork' conform to the 'Sendable' protocol[0;0m
[0;36m12 |[0;0m     let start: CGPoint
[0;36m13 |[0;0m     let strokes: [Stroke]
/Users/admin/builder/spi-builder-workspace/Sources/Chess/UI/PieceShape.swift:13:9: [1;33mwarning: [1;39mstored property 'artwork' of 'Sendable'-conforming struct 'PieceShape' has non-Sendable type 'PieceArtwork'; this is an error in the Swift 6 language mode[0;0m
[0;36m11 |[0;0m struct PieceShape: Shape {
[0;36m12 |[0;0m     var inset: CGFloat = 0.1
[0;36m13 |[0;0m     let artwork: PieceArtwork
   [0;36m|[0;0m         `- [1;33mwarning: [1;39mstored property 'artwork' of 'Sendable'-conforming struct 'PieceShape' has non-Sendable type 'PieceArtwork'; this is an error in the Swift 6 language mode[0;0m
[0;36m14 |[0;0m     func path(in rect: CGRect) -> Path {
[0;36m15 |[0;0m         return Path { path in
/Users/admin/builder/spi-builder-workspace/Sources/Chess/UI/PieceArtwork/PieceArtwork.swift:11:15: [1;39mnote: [1;39mconsider making struct 'PieceArtwork' conform to the 'Sendable' protocol[0;0m
 [0;36m9 |[0;0m import SwiftUI
[0;36m10 |[0;0m
[0;36m11 |[0;0m public struct PieceArtwork {
   [0;36m|[0;0m               `- [1;39mnote: [1;39mconsider making struct 'PieceArtwork' conform to the 'Sendable' protocol[0;0m
[0;36m12 |[0;0m     let start: CGPoint
[0;36m13 |[0;0m     let strokes: [Stroke]
/Users/admin/builder/spi-builder-workspace/Sources/Chess/UI/PlayerTitleView.swift:21:18: [1;33mwarning: [1;39m'animation' was deprecated in macOS 12.0: Use withAnimation or animation(_:value:) instead.[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/deprecated-declaration\DeprecatedDeclaration]8;;\]
[0;36m19 |[0;0m             Image(systemName: player.iconName())
[0;36m20 |[0;0m                 .rotationEffect(Angle(degrees: self.thinking ? 360 : 0.0))
[0;36m21 |[0;0m                 .animation(self.thinking ? foreverAnimation : .default)
   [0;36m|[0;0m                  `- [1;33mwarning: [1;39m'animation' was deprecated in macOS 12.0: Use withAnimation or animation(_:value:) instead.[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/deprecated-declaration\DeprecatedDeclaration]8;;\]
[0;36m22 |[0;0m             Text("\(player.menuName())")
[0;36m23 |[0;0m         }
[#DeprecatedDeclaration]: <https://docs.swift.org/compiler/documentation/diagnostics/deprecated-declaration>
/Users/admin/builder/spi-builder-workspace/Sources/Chess/Store/ChessStore.swift:44:31: [1;33mwarning: [1;39m'weak' ownership of capture 'self' differs from implicitly-captured strong reference in outer scope[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/implicit-strong-capture\ImplicitStrongCapture]8;;\]
 [0;36m38 |[0;0m     public func gameAction(_ action: Chess.GameAction) {
 [0;36m39 |[0;0m         // Process the message on the background, then sink back to the main thread.
 [0;36m40 |[0;0m         DispatchQueue.global().async {
    [0;36m|[0;0m                                      |- [1;39mnote: [1;39m'self' implicitly strongly captured here[0;0m
    [0;36m|[0;0m                                      `- [1;39mnote: [1;39madd 'self' as a capture list item to silence[0;0m
 [0;36m41 |[0;0m             self.gameSemaphore.wait()
 [0;36m42 |[0;0m             self.gamePublisher
 [0;36m43 |[0;0m                 .receive(on: RunLoop.main)
 [0;36m44 |[0;0m                 .sink { [weak self] newGame in
    [0;36m|[0;0m                               |- [1;33mwarning: [1;39m'weak' ownership of capture 'self' differs from implicitly-captured strong reference in outer scope[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/implicit-strong-capture\ImplicitStrongCapture]8;;\]
    [0;36m|[0;0m                               `- [1;39mnote: [1;39mexplicitly assign the capture list item to silence[0;0m
 [0;36m45 |[0;0m                     self?.processGameChanges(newGame)
 [0;36m46 |[0;0m                     self?.gameSemaphore.signal()
/Users/admin/builder/spi-builder-workspace/Sources/Chess/Store/ChessStore.swift:58:31: [1;33mwarning: [1;39m'weak' ownership of capture 'self' differs from implicitly-captured strong reference in outer scope[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/implicit-strong-capture\ImplicitStrongCapture]8;;\]
 [0;36m52 |[0;0m     public func environmentChange(_ change: ChessEnvironment.EnvironmentChange) {
 [0;36m53 |[0;0m         // Process the message on the background, then sink back to the main thread.
 [0;36m54 |[0;0m         DispatchQueue.global().async {
    [0;36m|[0;0m                                      |- [1;39mnote: [1;39m'self' implicitly strongly captured here[0;0m
    [0;36m|[0;0m                                      `- [1;39mnote: [1;39madd 'self' as a capture list item to silence[0;0m
 [0;36m55 |[0;0m             self.environmentSemaphore.wait()
 [0;36m56 |[0;0m             self.environmentPublisher
 [0;36m57 |[0;0m                 .receive(on: RunLoop.main)
 [0;36m58 |[0;0m                 .sink { [weak self] newEnvironment in
    [0;36m|[0;0m                               |- [1;33mwarning: [1;39m'weak' ownership of capture 'self' differs from implicitly-captured strong reference in outer scope[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/implicit-strong-capture\ImplicitStrongCapture]8;;\]
    [0;36m|[0;0m                               `- [1;39mnote: [1;39mexplicitly assign the capture list item to silence[0;0m
 [0;36m59 |[0;0m                     self?.processEnvironmentChanges(newEnvironment)
 [0;36m60 |[0;0m                     self?.environmentSemaphore.signal()
/Users/admin/builder/spi-builder-workspace/Sources/Chess/UI/BoardIconView.swift:36:29: [1;33mwarning: [1;39mnon-constant range: argument must be an integer literal[0;0m
[0;36m34 |[0;0m         GeometryReader { geometry in
[0;36m35 |[0;0m             VStack(alignment: .center, spacing: 0) {
[0;36m36 |[0;0m                 ForEach(0..<height) { yIdx in
   [0;36m|[0;0m                             `- [1;33mwarning: [1;39mnon-constant range: argument must be an integer literal[0;0m
[0;36m37 |[0;0m                     HStack(alignment: .center, spacing: 0) {
[0;36m38 |[0;0m                         ForEach(0..<width) { xIdx in
/Users/admin/builder/spi-builder-workspace/Sources/Chess/UI/BoardIconView.swift:38:37: [1;33mwarning: [1;39mnon-constant range: argument must be an integer literal[0;0m
[0;36m36 |[0;0m                 ForEach(0..<height) { yIdx in
[0;36m37 |[0;0m                     HStack(alignment: .center, spacing: 0) {
[0;36m38 |[0;0m                         ForEach(0..<width) { xIdx in
   [0;36m|[0;0m                                     `- [1;33mwarning: [1;39mnon-constant range: argument must be an integer literal[0;0m
[0;36m39 |[0;0m                             Rectangle()
[0;36m40 |[0;0m                                 .fill( (yIdx + xIdx) % 2 == 0 ? color.dark : color.light )
/Users/admin/builder/spi-builder-workspace/Sources/Chess/UI/ChessSettingsView.swift:49:67: [1;33mwarning: [1;39mnon-constant range: argument must be an integer literal[0;0m
 [0;36m47 |[0;0m                     Picker(selection: $store.game.playerFactory.white,
 [0;36m48 |[0;0m                            label: Text("White")) {
 [0;36m49 |[0;0m                         ForEach(0 ..< Chess.playerFactory.players.count) {
    [0;36m|[0;0m                                                                   `- [1;33mwarning: [1;39mnon-constant range: argument must be an integer literal[0;0m
 [0;36m50 |[0;0m                             PlayerTitleView(player: Chess.playerFactory.players[$0](.white))
 [0;36m51 |[0;0m                         }
/Users/admin/builder/spi-builder-workspace/Sources/Chess/UI/ChessSettingsView.swift:58:67: [1;33mwarning: [1;39mnon-constant range: argument must be an integer literal[0;0m
 [0;36m56 |[0;0m                     Picker(selection: $store.game.playerFactory.black,
 [0;36m57 |[0;0m                            label: Text("Black")) {
 [0;36m58 |[0;0m                         ForEach(0 ..< Chess.playerFactory.players.count) {
    [0;36m|[0;0m                                                                   `- [1;33mwarning: [1;39mnon-constant range: argument must be an integer literal[0;0m
 [0;36m59 |[0;0m                             PlayerTitleView(player: Chess.playerFactory.players[$0](.black))
 [0;36m60 |[0;0m                         }
[#ImplicitStrongCapture]: <https://docs.swift.org/compiler/documentation/diagnostics/implicit-strong-capture>
/Users/admin/builder/spi-builder-workspace/Sources/Chess/UI/Sound.swift:9:43: [1;33mwarning: [1;39musing 'class' keyword to define a class-constrained protocol is deprecated; use 'AnyObject' instead[0;0m [#deprecation]
 [0;36m7 |[0;0m /// The sound is handled outside of this library, but for timing the optional
 [0;36m8 |[0;0m /// methods are included here.
 [0;36m9 |[0;0m public protocol ChessSoundEffectDelegate: class {
   [0;36m|[0;0m                                           `- [1;33mwarning: [1;39musing 'class' keyword to define a class-constrained protocol is deprecated; use 'AnyObject' instead[0;0m [#deprecation]
[0;36m10 |[0;0m     func move()
[0;36m11 |[0;0m     func capture()
/Users/admin/builder/spi-builder-workspace/Sources/Chess/Robots/MontyCarlo.swift:47:22: [1;33mwarning: [1;39mweak variable 'weakSelf' was never mutated; consider changing to 'let' constant[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/variable-never-mutated\VariableNeverMutated]8;;\::]8;;https://docs.swift.org/compiler/documentation/diagnostics/weak-mutability\WeakMutability]8;;\]
[0;36m45 |[0;0m             strategist.gameModel = board
[0;36m46 |[0;0m             strategist.randomSource = GKARC4RandomSource()
[0;36m47 |[0;0m             weak var weakSelf = self
   [0;36m|[0;0m                      `- [1;33mwarning: [1;39mweak variable 'weakSelf' was never mutated; consider changing to 'let' constant[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/variable-never-mutated\VariableNeverMutated]8;;\::]8;;https://docs.swift.org/compiler/documentation/diagnostics/weak-mutability\WeakMutability]8;;\]
[0;36m48 |[0;0m             weak var weakDelegate = delegate
[0;36m49 |[0;0m             Thread.detachNewThread {
/Users/admin/builder/spi-builder-workspace/Sources/Chess/Robots/MontyCarlo.swift:48:22: [1;33mwarning: [1;39mweak variable 'weakDelegate' was never mutated; consider changing to 'let' constant[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/variable-never-mutated\VariableNeverMutated]8;;\::]8;;https://docs.swift.org/compiler/documentation/diagnostics/weak-mutability\WeakMutability]8;;\]
[0;36m46 |[0;0m             strategist.randomSource = GKARC4RandomSource()
[0;36m47 |[0;0m             weak var weakSelf = self
[0;36m48 |[0;0m             weak var weakDelegate = delegate
   [0;36m|[0;0m                      `- [1;33mwarning: [1;39mweak variable 'weakDelegate' was never mutated; consider changing to 'let' constant[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/variable-never-mutated\VariableNeverMutated]8;;\::]8;;https://docs.swift.org/compiler/documentation/diagnostics/weak-mutability\WeakMutability]8;;\]
[0;36m49 |[0;0m             Thread.detachNewThread {
[0;36m50 |[0;0m                 guard let self = weakSelf, let delegate = weakDelegate else { return }
[#VariableNeverMutated]: <https://docs.swift.org/compiler/documentation/diagnostics/variable-never-mutated>
[#WeakMutability]: <https://docs.swift.org/compiler/documentation/diagnostics/weak-mutability>
Build complete.
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warning: 'spi-builder-workspace': Invalid Exclude '/Users/admin/builder/spi-builder-workspace/Sources/Chess/PlayChess': File not found.
Done.