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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 swift-geometrize, reference 1.2.1 (2f3b34), with Swift 6.0 for macOS (SPM) on 1 Nov 2024 07:53:38 UTC.

Swift 6 data race errors: 1

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete

Build Log

========================================
RunAll
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Builder version: 4.56.0
Interrupt handler set up.
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Checkout
========================================
Clone URL: https://github.com/valeriyvan/swift-geometrize.git
Reference: 1.2.1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/valeriyvan/swift-geometrize
 * tag               1.2.1      -> FETCH_HEAD
HEAD is now at 2f3b34c Use stable version of SwiftLint
Cloned https://github.com/valeriyvan/swift-geometrize.git
Revision (git rev-parse @):
2f3b34cb6a9f0820c0ca411528abcd9a45202088
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========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
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Creating working copy for https://github.com/drmohundro/SWXMLHash.git
Working copy of https://github.com/drmohundro/SWXMLHash.git resolved at 7.0.2
[32750/11453398] Downloading https://github.com/realm/SwiftLint/releases/download/0.57.0/SwiftLintBinary-macos.artifactbundle.zip
Downloading binary artifact https://github.com/realm/SwiftLint/releases/download/0.57.0/SwiftLintBinary-macos.artifactbundle.zip
Downloaded https://github.com/realm/SwiftLint/releases/download/0.57.0/SwiftLintBinary-macos.artifactbundle.zip (1.32s)
Found 5 product dependencies
  - swift-png
  - jpeg
  - swift-algorithms
  - swift-argument-parser
  - SwiftLint
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/valeriyvan/swift-geometrize.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete
[1/1] Compiling plugin GenerateManual
[2/2] Compiling plugin SwiftLintBuildToolPlugin
[3/3] Compiling plugin SwiftLintCommandPlugin
Building for debugging...
[3/25] Write sources
[8/25] Write geometrize-entitlement.plist
[9/25] Write sources
[9/25] Copying PrivacyInfo.xcprivacy
[10/25] Write sources
[20/25] Compiling _NumericsShims _NumericsShims.c
[21/25] Write swift-version--7754E27361AE5C74.txt
[23/48] Compiling BaseDigits BaseDigits.swift
[24/48] Emitting module BaseDigits
[25/48] Compiling RealModule AugmentedArithmetic.swift
[26/49] Compiling RealModule ApproximateEquality.swift
[27/49] Compiling RealModule AlgebraicField.swift
[28/49] Emitting module RealModule
[29/49] Compiling RealModule Float80+Real.swift
[30/49] Compiling RealModule Real.swift
[31/49] Compiling RealModule RealFunctions.swift
[32/54] Compiling RealModule ElementaryFunctions.swift
[33/54] Compiling RealModule Float+Real.swift
[34/54] Compiling RealModule Float16+Real.swift
[35/54] Compiling RealModule Double+Real.swift
[36/80] Compiling ArgumentParserToolInfo ToolInfo.swift
[37/80] Emitting module ArgumentParserToolInfo
[38/118] Compiling Base16 Base16.Values.swift
[39/118] Compiling Base16 Base16.swift
[40/118] Compiling Base16 Base16.LowercaseDigits.swift
[41/118] Emitting module Base16
[42/118] Compiling Base16 Base16.UppercaseDigits.swift
[43/120] Compiling SwiftJPEG debug.swift
[44/120] Emitting module SwiftJPEG
[45/120] Compiling CRC CRC32.swift
[46/120] Emitting module CRC
[47/175] Compiling SwiftJPEG os.swift
[48/175] Compiling SwiftJPEG metadata.swift
[49/175] Compiling LZ77 LZ77.RunLiteral.swift
[50/175] Compiling LZ77 LZ77.BlockMetadata.swift
[51/175] Compiling LZ77 LZ77.BlockShape.swift
[52/175] Compiling LZ77 LZ77.BlockState.swift
[53/175] Compiling LZ77 LZ77.BlockType.swift
[54/175] Compiling LZ77 LZ77.DecompressionError.swift
[55/180] Compiling LZ77 Gzip.Format.swift
[56/180] Compiling LZ77 Gzip.Inflator.swift
[57/180] Compiling LZ77 Gzip.InflatorState.swift
[58/180] Compiling LZ77 Gzip.StreamHeader.swift
[59/180] Compiling LZ77 Gzip.StreamHeaderError.swift
[60/180] Compiling LZ77 Gzip.swift
[61/180] Compiling LZ77 LZ77.HuffmanTree.swift
[62/180] Compiling LZ77 LZ77.Metaword.swift
[70/182] Compiling LZ77 LZ77.DeflatorDicing.swift
[71/182] Compiling LZ77 LZ77.Codeword.swift
[72/182] Compiling LZ77 LZ77.DeflatorBuffers.swift
[73/182] Compiling LZ77 LZ77.DeflatorDicing.Node.swift
[74/182] Compiling LZ77 LZ77.Distance.swift
[75/182] Compiling LZ77 LZ77.Heap.swift
[76/182] Compiling LZ77 LZ77.HuffmanPattern.swift
[77/182] Compiling LZ77 LZ77.Decades.swift
[78/182] Compiling LZ77 LZ77.Deflator.swift
[79/182] Compiling LZ77 LZ77.DeflatorBuffers.Stream.swift
[80/182] Compiling LZ77 SIMD16 (ext).swift
[81/182] Compiling LZ77 LZ77.Format.swift
[82/182] Compiling LZ77 LZ77.FormatType.swift
[83/182] Compiling LZ77 LZ77.MRC32.swift
[84/182] Compiling LZ77 LZ77.StreamIntegral.swift
[85/182] Emitting module LZ77
[86/182] Compiling SwiftJPEG error.swift
[87/182] Compiling SwiftJPEG jpeg.swift
[88/182] Compiling Algorithms Unique.swift
[89/182] Compiling Algorithms Windows.swift
[90/182] Compiling LZ77 FixedWidthInteger (ext).swift
[91/182] Compiling LZ77 Gzip.Deflator.swift
[92/182] Compiling LZ77 Gzip.Format.Integral.swift
[93/182] Compiling LZ77 F14.Hash.swift
[94/182] Compiling LZ77 F14.HashTable.swift
[95/182] Compiling LZ77 F14.swift
[96/182] Compiling LZ77 LZ77.Inflator.swift
[97/182] Compiling LZ77 LZ77.InflatorBuffers.Stream.swift
[98/182] Compiling LZ77 LZ77.InflatorBuffers.swift
[99/182] Compiling LZ77 LZ77.InflatorIn.swift
[100/182] Compiling LZ77 LZ77.InflatorOut.swift
[101/182] Compiling LZ77 LZ77.InflatorState.swift
[102/182] Compiling LZ77 LZ77.InflatorTables.swift
[103/182] Compiling LZ77 LZ77.StreamHeader.swift
[104/182] Compiling LZ77 LZ77.StreamHeaderError.swift
[105/182] Compiling LZ77 LZ77.Composites.swift
[106/182] Compiling LZ77 LZ77.Reversed.swift
[107/182] Compiling LZ77 LZ77.swift
[108/182] Compiling LZ77 LZ77.DeflatorTerm.Meta.swift
[109/182] Compiling LZ77 LZ77.DeflatorTerm.swift
[110/182] Compiling LZ77 LZ77.DeflatorWindow.Element.swift
[111/182] Compiling LZ77 LZ77.DeflatorWindow.swift
[112/182] Compiling LZ77 F14.District.Index.swift
[113/182] Compiling LZ77 F14.District.swift
[114/182] Compiling LZ77 LZ77.DeflatorIn.swift
[115/182] Compiling LZ77 LZ77.DeflatorMatches.Depths.swift
[116/182] Compiling LZ77 LZ77.DeflatorMatches.swift
[117/182] Compiling LZ77 LZ77.DeflatorOut.swift
[118/182] Compiling LZ77 LZ77.DeflatorSearch.swift
[119/182] Compiling LZ77 LZ77.DeflatorTables.swift
[120/182] Compiling SwiftJPEG encode.swift
[121/182] Compiling SwiftJPEG common.swift
[122/182] Compiling SwiftJPEG decode.swift
[123/182] Emitting module ArgumentParser
[159/232] Compiling PNG PNG.Color.swift
[160/232] Compiling PNG PNG.RGBA.swift
[161/232] Compiling PNG PNG.VA.swift
[162/232] Compiling PNG PNG.swift
[163/232] Emitting module Algorithms
[164/269] Compiling Geometrize RotatedEllipse.swift
[165/269] Compiling Geometrize RotatedRectangle.swift
[166/269] Compiling Geometrize Shape.swift
[167/269] Compiling Geometrize String-ShapeType.swift
[168/269] Compiling Geometrize Rgba.swift
[169/269] Compiling Geometrize SVGExporter.swift
[170/269] Compiling Geometrize Scanline.swift
[171/269] Compiling Geometrize ShapeAcceptancePrecondition.swift
[172/269] Compiling Geometrize ShapeCreator.swift
[173/269] Compiling Geometrize ShapeResult.swift
[174/269] Compiling Geometrize Circle.swift
[175/269] Compiling Geometrize Ellipse.swift
[176/269] Compiling Geometrize Line.swift
[177/269] Compiling Geometrize Polyline.swift
[178/269] Compiling Geometrize QuadraticBezier.swift
[179/269] Compiling Geometrize Rectangle.swift
[180/269] Compiling Geometrize Triangle.swift
[181/269] Compiling Geometrize allShapeTypes.swift
[182/269] Compiling Geometrize SplitMix64.swift
[183/269] Compiling PNG ArraySlice (ext).swift
[184/269] Emitting module PNG
[185/273] Compiling Geometrize GeometrizingIterator.swift
[186/273] Compiling Geometrize GeometrizingSequence.swift
[187/273] Compiling Geometrize HillClimb.swift
[188/273] Compiling Geometrize ImageRunner.swift
[189/273] Compiling Geometrize Int_random.swift
[195/273] Compiling PNG PNG.Transparency.swift
[196/273] Compiling PNG System.swift
[197/273] Compiling PNG UnsafeMutableBufferPointer (ext).swift
[198/273] Compiling PNG __Entrypoint.swift
[199/273] Compiling Geometrize Point.swift
[200/273] Compiling Geometrize Polygon.swift
[205/273] Compiling PNG PNG.Background.Case.swift
[206/273] Compiling PNG PNG.Background.swift
[207/273] Compiling PNG PNG.Chromaticity.swift
[208/273] Compiling PNG PNG.ColorProfile.swift
[224/273] Compiling Geometrize BitmapExporter.swift
[225/273] Compiling Geometrize Bounds.swift
[226/273] Compiling Geometrize EnergyFunction.swift
[227/273] Compiling Geometrize FloatingPointExtension.swift
[228/273] Compiling Geometrize BinaryInteger.swift
[229/273] Compiling Geometrize Bitmap+UIImage.swift
[230/273] Compiling Geometrize Bitmap.swift
[231/273] Compiling Geometrize BitmapDifference.swift
[232/273] Compiling Geometrize GeometrizeModelBase.swift
[233/273] Compiling Geometrize GeometrizeModelHillClimb.swift
[238/277] Emitting module Geometrize
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/Int_random.swift:7:5: warning: var '_randomImplementationReference' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 5 |
 6 | // swiftlint:disable:next identifier_name
 7 | var _randomImplementationReference = _randomImplementation
   |     |- warning: var '_randomImplementationReference' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |     |- note: convert '_randomImplementationReference' to a 'let' constant to make 'Sendable' shared state immutable
   |     |- note: annotate '_randomImplementationReference' with '@MainActor' if property should only be accessed from the main actor
   |     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 8 |
 9 | // swiftlint:disable:next identifier_name
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/HillClimb.swift:54:9: warning: capture of 'callback' with non-sendable type '(State) -> Void' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 52 |     )
 53 |     queue.async {
 54 |         callback(resState)
    |         |- warning: capture of 'callback' with non-sendable type '(State) -> Void' in a `@Sendable` closure; this is an error in the Swift 6 language mode
    |         `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
 55 |     }
 56 | }
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/HillClimb.swift:54:18: warning: capture of 'resState' with non-sendable type 'State' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 52 |     )
 53 |     queue.async {
 54 |         callback(resState)
    |                  `- warning: capture of 'resState' with non-sendable type 'State' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 55 |     }
 56 | }
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/State.swift:3:8: note: consider making struct 'State' conform to the 'Sendable' protocol
 1 | import Foundation
 2 |
 3 | struct State {
   |        `- note: consider making struct 'State' conform to the 'Sendable' protocol
 4 |
 5 |     /// Creates a new state.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/Int_random.swift:7:5: warning: var '_randomImplementationReference' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 5 |
 6 | // swiftlint:disable:next identifier_name
 7 | var _randomImplementationReference = _randomImplementation
   |     |- warning: var '_randomImplementationReference' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |     |- note: convert '_randomImplementationReference' to a 'let' constant to make 'Sendable' shared state immutable
   |     |- note: annotate '_randomImplementationReference' with '@MainActor' if property should only be accessed from the main actor
   |     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 8 |
 9 | // swiftlint:disable:next identifier_name
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/HillClimb.swift:54:9: warning: capture of 'callback' with non-sendable type '(State) -> Void' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 52 |     )
 53 |     queue.async {
 54 |         callback(resState)
    |         |- warning: capture of 'callback' with non-sendable type '(State) -> Void' in a `@Sendable` closure; this is an error in the Swift 6 language mode
    |         `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
 55 |     }
 56 | }
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/HillClimb.swift:54:18: warning: capture of 'resState' with non-sendable type 'State' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 52 |     )
 53 |     queue.async {
 54 |         callback(resState)
    |                  `- warning: capture of 'resState' with non-sendable type 'State' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 55 |     }
 56 | }
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/State.swift:3:8: note: consider making struct 'State' conform to the 'Sendable' protocol
 1 | import Foundation
 2 |
 3 | struct State {
   |        `- note: consider making struct 'State' conform to the 'Sendable' protocol
 4 |
 5 |     /// Creates a new state.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/Int_random.swift:7:5: warning: var '_randomImplementationReference' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 5 |
 6 | // swiftlint:disable:next identifier_name
 7 | var _randomImplementationReference = _randomImplementation
   |     |- warning: var '_randomImplementationReference' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |     |- note: convert '_randomImplementationReference' to a 'let' constant to make 'Sendable' shared state immutable
   |     |- note: annotate '_randomImplementationReference' with '@MainActor' if property should only be accessed from the main actor
   |     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 8 |
 9 | // swiftlint:disable:next identifier_name
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/HillClimb.swift:54:9: warning: capture of 'callback' with non-sendable type '(State) -> Void' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 52 |     )
 53 |     queue.async {
 54 |         callback(resState)
    |         |- warning: capture of 'callback' with non-sendable type '(State) -> Void' in a `@Sendable` closure; this is an error in the Swift 6 language mode
    |         `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
 55 |     }
 56 | }
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/HillClimb.swift:54:18: warning: capture of 'resState' with non-sendable type 'State' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 52 |     )
 53 |     queue.async {
 54 |         callback(resState)
    |                  `- warning: capture of 'resState' with non-sendable type 'State' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 55 |     }
 56 | }
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/State.swift:3:8: note: consider making struct 'State' conform to the 'Sendable' protocol
 1 | import Foundation
 2 |
 3 | struct State {
   |        `- note: consider making struct 'State' conform to the 'Sendable' protocol
 4 |
 5 |     /// Creates a new state.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/Int_random.swift:7:5: warning: var '_randomImplementationReference' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 5 |
 6 | // swiftlint:disable:next identifier_name
 7 | var _randomImplementationReference = _randomImplementation
   |     |- warning: var '_randomImplementationReference' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |     |- note: convert '_randomImplementationReference' to a 'let' constant to make 'Sendable' shared state immutable
   |     |- note: annotate '_randomImplementationReference' with '@MainActor' if property should only be accessed from the main actor
   |     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 8 |
 9 | // swiftlint:disable:next identifier_name
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/HillClimb.swift:54:9: warning: capture of 'callback' with non-sendable type '(State) -> Void' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 52 |     )
 53 |     queue.async {
 54 |         callback(resState)
    |         |- warning: capture of 'callback' with non-sendable type '(State) -> Void' in a `@Sendable` closure; this is an error in the Swift 6 language mode
    |         `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
 55 |     }
 56 | }
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/HillClimb.swift:54:18: warning: capture of 'resState' with non-sendable type 'State' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 52 |     )
 53 |     queue.async {
 54 |         callback(resState)
    |                  `- warning: capture of 'resState' with non-sendable type 'State' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 55 |     }
 56 | }
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/State.swift:3:8: note: consider making struct 'State' conform to the 'Sendable' protocol
 1 | import Foundation
 2 |
 3 | struct State {
   |        `- note: consider making struct 'State' conform to the 'Sendable' protocol
 4 |
 5 |     /// Creates a new state.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/Int_random.swift:7:5: warning: var '_randomImplementationReference' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 5 |
 6 | // swiftlint:disable:next identifier_name
 7 | var _randomImplementationReference = _randomImplementation
   |     |- warning: var '_randomImplementationReference' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |     |- note: convert '_randomImplementationReference' to a 'let' constant to make 'Sendable' shared state immutable
   |     |- note: annotate '_randomImplementationReference' with '@MainActor' if property should only be accessed from the main actor
   |     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 8 |
 9 | // swiftlint:disable:next identifier_name
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:41:38: warning: capture of 'currentBitmap' with non-sendable type 'Bitmap' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 39 |             group.enter()
 40 |             concurrentQueue.async { [targetBitmap, currentBitmap] in
 41 |                 var buffer: Bitmap = currentBitmap
    |                                      `- warning: capture of 'currentBitmap' with non-sendable type 'Bitmap' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 42 |                 bestHillClimbState(
 43 |                     shapeCreator: shapeCreator,
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/Bitmap.swift:5:15: note: consider making struct 'Bitmap' conform to the 'Sendable' protocol
  3 | /// Helper for working with bitmap data.
  4 | /// Pixels are ordered line by line, like arrays in C.
  5 | public struct Bitmap { // swiftlint:disable:this type_body_length
    |               `- note: consider making struct 'Bitmap' conform to the 'Sendable' protocol
  6 |
  7 |     /// Creates useless empty bitmap.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:43:35: warning: capture of 'shapeCreator' with non-sendable type 'ShapeCreator' (aka '(inout SplitMix64) -> any Shape') in a `@Sendable` closure; this is an error in the Swift 6 language mode
 41 |                 var buffer: Bitmap = currentBitmap
 42 |                 bestHillClimbState(
 43 |                     shapeCreator: shapeCreator,
    |                                   |- warning: capture of 'shapeCreator' with non-sendable type 'ShapeCreator' (aka '(inout SplitMix64) -> any Shape') in a `@Sendable` closure; this is an error in the Swift 6 language mode
    |                                   `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
 44 |                     alpha: alpha,
 45 |                     n: shapeCount,
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:47:29: warning: capture of 'targetBitmap' with non-sendable type 'Bitmap' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 45 |                     n: shapeCount,
 46 |                     age: maxShapeMutations,
 47 |                     target: targetBitmap,
    |                             `- warning: capture of 'targetBitmap' with non-sendable type 'Bitmap' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 48 |                     current: currentBitmap,
 49 |                     buffer: &buffer,
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/Bitmap.swift:5:15: note: consider making struct 'Bitmap' conform to the 'Sendable' protocol
  3 | /// Helper for working with bitmap data.
  4 | /// Pixels are ordered line by line, like arrays in C.
  5 | public struct Bitmap { // swiftlint:disable:this type_body_length
    |               `- note: consider making struct 'Bitmap' conform to the 'Sendable' protocol
  6 |
  7 |     /// Creates useless empty bitmap.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:51:37: warning: capture of 'energyFunction' with non-sendable type 'EnergyFunction' (aka '(Array<Scanline>, UInt8, Bitmap, Bitmap, inout Bitmap, Double) -> Double') in a `@Sendable` closure; this is an error in the Swift 6 language mode
 49 |                     buffer: &buffer,
 50 |                     lastScore: lastScore,
 51 |                     energyFunction: energyFunction,
    |                                     |- warning: capture of 'energyFunction' with non-sendable type 'EnergyFunction' (aka '(Array<Scanline>, UInt8, Bitmap, Bitmap, inout Bitmap, Double) -> Double') in a `@Sendable` closure; this is an error in the Swift 6 language mode
    |                                     `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
 52 |                     using: &generator,
 53 |                     callback: { state in
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:52:29: warning: capture of 'generator' with non-sendable type 'SplitMix64' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 50 |                     lastScore: lastScore,
 51 |                     energyFunction: energyFunction,
 52 |                     using: &generator,
    |                             `- warning: capture of 'generator' with non-sendable type 'SplitMix64' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 53 |                     callback: { state in
 54 |                         states.append(state)
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/SplitMix64.swift:4:15: note: consider making struct 'SplitMix64' conform to the 'Sendable' protocol
 2 |
 3 | // Borrowed https://github.com/apple/swift-argument-parser/blob/main/Examples/roll/SplitMix64.swift
 4 | public struct SplitMix64: RandomNumberGenerator {
   |               `- note: consider making struct 'SplitMix64' conform to the 'Sendable' protocol
 5 |     private var state: UInt64
 6 |
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:54:25: warning: capture of 'states' with non-sendable type '[State]' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 52 |                     using: &generator,
 53 |                     callback: { state in
 54 |                         states.append(state)
    |                         `- warning: capture of 'states' with non-sendable type '[State]' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 55 |                         group.leave()
 56 |                     },
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/State.swift:3:8: note: consider making struct 'State' conform to the 'Sendable' protocol
 1 | import Foundation
 2 |
 3 | struct State {
   |        `- note: consider making struct 'State' conform to the 'Sendable' protocol
 4 |
 5 |     /// Creates a new state.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:52:29: warning: mutation of captured var 'generator' in concurrently-executing code; this is an error in the Swift 6 language mode
 50 |                     lastScore: lastScore,
 51 |                     energyFunction: energyFunction,
 52 |                     using: &generator,
    |                             `- warning: mutation of captured var 'generator' in concurrently-executing code; this is an error in the Swift 6 language mode
 53 |                     callback: { state in
 54 |                         states.append(state)
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:54:25: warning: capture of 'states' with non-sendable type '[State]' in an isolated closure; this is an error in the Swift 6 language mode
 52 |                     using: &generator,
 53 |                     callback: { state in
 54 |                         states.append(state)
    |                         `- warning: capture of 'states' with non-sendable type '[State]' in an isolated closure; this is an error in the Swift 6 language mode
 55 |                         group.leave()
 56 |                     },
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/State.swift:3:8: note: consider making struct 'State' conform to the 'Sendable' protocol
 1 | import Foundation
 2 |
 3 | struct State {
   |        `- note: consider making struct 'State' conform to the 'Sendable' protocol
 4 |
 5 |     /// Creates a new state.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:54:25: warning: mutation of captured var 'states' in concurrently-executing code; this is an error in the Swift 6 language mode
 52 |                     using: &generator,
 53 |                     callback: { state in
 54 |                         states.append(state)
    |                         `- warning: mutation of captured var 'states' in concurrently-executing code; this is an error in the Swift 6 language mode
 55 |                         group.leave()
 56 |                     },
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:41:38: warning: capture of 'currentBitmap' with non-sendable type 'Bitmap' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 39 |             group.enter()
 40 |             concurrentQueue.async { [targetBitmap, currentBitmap] in
 41 |                 var buffer: Bitmap = currentBitmap
    |                                      `- warning: capture of 'currentBitmap' with non-sendable type 'Bitmap' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 42 |                 bestHillClimbState(
 43 |                     shapeCreator: shapeCreator,
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/Bitmap.swift:5:15: note: consider making struct 'Bitmap' conform to the 'Sendable' protocol
  3 | /// Helper for working with bitmap data.
  4 | /// Pixels are ordered line by line, like arrays in C.
  5 | public struct Bitmap { // swiftlint:disable:this type_body_length
    |               `- note: consider making struct 'Bitmap' conform to the 'Sendable' protocol
  6 |
  7 |     /// Creates useless empty bitmap.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:43:35: warning: capture of 'shapeCreator' with non-sendable type 'ShapeCreator' (aka '(inout SplitMix64) -> any Shape') in a `@Sendable` closure; this is an error in the Swift 6 language mode
 41 |                 var buffer: Bitmap = currentBitmap
 42 |                 bestHillClimbState(
 43 |                     shapeCreator: shapeCreator,
    |                                   |- warning: capture of 'shapeCreator' with non-sendable type 'ShapeCreator' (aka '(inout SplitMix64) -> any Shape') in a `@Sendable` closure; this is an error in the Swift 6 language mode
    |                                   `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
 44 |                     alpha: alpha,
 45 |                     n: shapeCount,
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:47:29: warning: capture of 'targetBitmap' with non-sendable type 'Bitmap' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 45 |                     n: shapeCount,
 46 |                     age: maxShapeMutations,
 47 |                     target: targetBitmap,
    |                             `- warning: capture of 'targetBitmap' with non-sendable type 'Bitmap' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 48 |                     current: currentBitmap,
 49 |                     buffer: &buffer,
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/Bitmap.swift:5:15: note: consider making struct 'Bitmap' conform to the 'Sendable' protocol
  3 | /// Helper for working with bitmap data.
  4 | /// Pixels are ordered line by line, like arrays in C.
  5 | public struct Bitmap { // swiftlint:disable:this type_body_length
    |               `- note: consider making struct 'Bitmap' conform to the 'Sendable' protocol
  6 |
  7 |     /// Creates useless empty bitmap.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:51:37: warning: capture of 'energyFunction' with non-sendable type 'EnergyFunction' (aka '(Array<Scanline>, UInt8, Bitmap, Bitmap, inout Bitmap, Double) -> Double') in a `@Sendable` closure; this is an error in the Swift 6 language mode
 49 |                     buffer: &buffer,
 50 |                     lastScore: lastScore,
 51 |                     energyFunction: energyFunction,
    |                                     |- warning: capture of 'energyFunction' with non-sendable type 'EnergyFunction' (aka '(Array<Scanline>, UInt8, Bitmap, Bitmap, inout Bitmap, Double) -> Double') in a `@Sendable` closure; this is an error in the Swift 6 language mode
    |                                     `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
 52 |                     using: &generator,
 53 |                     callback: { state in
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:52:29: warning: capture of 'generator' with non-sendable type 'SplitMix64' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 50 |                     lastScore: lastScore,
 51 |                     energyFunction: energyFunction,
 52 |                     using: &generator,
    |                             `- warning: capture of 'generator' with non-sendable type 'SplitMix64' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 53 |                     callback: { state in
 54 |                         states.append(state)
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/SplitMix64.swift:4:15: note: consider making struct 'SplitMix64' conform to the 'Sendable' protocol
 2 |
 3 | // Borrowed https://github.com/apple/swift-argument-parser/blob/main/Examples/roll/SplitMix64.swift
 4 | public struct SplitMix64: RandomNumberGenerator {
   |               `- note: consider making struct 'SplitMix64' conform to the 'Sendable' protocol
 5 |     private var state: UInt64
 6 |
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:54:25: warning: capture of 'states' with non-sendable type '[State]' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 52 |                     using: &generator,
 53 |                     callback: { state in
 54 |                         states.append(state)
    |                         `- warning: capture of 'states' with non-sendable type '[State]' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 55 |                         group.leave()
 56 |                     },
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/State.swift:3:8: note: consider making struct 'State' conform to the 'Sendable' protocol
 1 | import Foundation
 2 |
 3 | struct State {
   |        `- note: consider making struct 'State' conform to the 'Sendable' protocol
 4 |
 5 |     /// Creates a new state.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:52:29: warning: mutation of captured var 'generator' in concurrently-executing code; this is an error in the Swift 6 language mode
 50 |                     lastScore: lastScore,
 51 |                     energyFunction: energyFunction,
 52 |                     using: &generator,
    |                             `- warning: mutation of captured var 'generator' in concurrently-executing code; this is an error in the Swift 6 language mode
 53 |                     callback: { state in
 54 |                         states.append(state)
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:54:25: warning: capture of 'states' with non-sendable type '[State]' in an isolated closure; this is an error in the Swift 6 language mode
 52 |                     using: &generator,
 53 |                     callback: { state in
 54 |                         states.append(state)
    |                         `- warning: capture of 'states' with non-sendable type '[State]' in an isolated closure; this is an error in the Swift 6 language mode
 55 |                         group.leave()
 56 |                     },
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/State.swift:3:8: note: consider making struct 'State' conform to the 'Sendable' protocol
 1 | import Foundation
 2 |
 3 | struct State {
   |        `- note: consider making struct 'State' conform to the 'Sendable' protocol
 4 |
 5 |     /// Creates a new state.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:54:25: warning: mutation of captured var 'states' in concurrently-executing code; this is an error in the Swift 6 language mode
 52 |                     using: &generator,
 53 |                     callback: { state in
 54 |                         states.append(state)
    |                         `- warning: mutation of captured var 'states' in concurrently-executing code; this is an error in the Swift 6 language mode
 55 |                         group.leave()
 56 |                     },
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:41:38: warning: capture of 'currentBitmap' with non-sendable type 'Bitmap' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 39 |             group.enter()
 40 |             concurrentQueue.async { [targetBitmap, currentBitmap] in
 41 |                 var buffer: Bitmap = currentBitmap
    |                                      `- warning: capture of 'currentBitmap' with non-sendable type 'Bitmap' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 42 |                 bestHillClimbState(
 43 |                     shapeCreator: shapeCreator,
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/Bitmap.swift:5:15: note: consider making struct 'Bitmap' conform to the 'Sendable' protocol
  3 | /// Helper for working with bitmap data.
  4 | /// Pixels are ordered line by line, like arrays in C.
  5 | public struct Bitmap { // swiftlint:disable:this type_body_length
    |               `- note: consider making struct 'Bitmap' conform to the 'Sendable' protocol
  6 |
  7 |     /// Creates useless empty bitmap.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:43:35: warning: capture of 'shapeCreator' with non-sendable type 'ShapeCreator' (aka '(inout SplitMix64) -> any Shape') in a `@Sendable` closure; this is an error in the Swift 6 language mode
 41 |                 var buffer: Bitmap = currentBitmap
 42 |                 bestHillClimbState(
 43 |                     shapeCreator: shapeCreator,
    |                                   |- warning: capture of 'shapeCreator' with non-sendable type 'ShapeCreator' (aka '(inout SplitMix64) -> any Shape') in a `@Sendable` closure; this is an error in the Swift 6 language mode
    |                                   `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
 44 |                     alpha: alpha,
 45 |                     n: shapeCount,
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:47:29: warning: capture of 'targetBitmap' with non-sendable type 'Bitmap' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 45 |                     n: shapeCount,
 46 |                     age: maxShapeMutations,
 47 |                     target: targetBitmap,
    |                             `- warning: capture of 'targetBitmap' with non-sendable type 'Bitmap' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 48 |                     current: currentBitmap,
 49 |                     buffer: &buffer,
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/Bitmap.swift:5:15: note: consider making struct 'Bitmap' conform to the 'Sendable' protocol
  3 | /// Helper for working with bitmap data.
  4 | /// Pixels are ordered line by line, like arrays in C.
  5 | public struct Bitmap { // swiftlint:disable:this type_body_length
    |               `- note: consider making struct 'Bitmap' conform to the 'Sendable' protocol
  6 |
  7 |     /// Creates useless empty bitmap.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:51:37: warning: capture of 'energyFunction' with non-sendable type 'EnergyFunction' (aka '(Array<Scanline>, UInt8, Bitmap, Bitmap, inout Bitmap, Double) -> Double') in a `@Sendable` closure; this is an error in the Swift 6 language mode
 49 |                     buffer: &buffer,
 50 |                     lastScore: lastScore,
 51 |                     energyFunction: energyFunction,
    |                                     |- warning: capture of 'energyFunction' with non-sendable type 'EnergyFunction' (aka '(Array<Scanline>, UInt8, Bitmap, Bitmap, inout Bitmap, Double) -> Double') in a `@Sendable` closure; this is an error in the Swift 6 language mode
    |                                     `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
 52 |                     using: &generator,
 53 |                     callback: { state in
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:52:29: warning: capture of 'generator' with non-sendable type 'SplitMix64' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 50 |                     lastScore: lastScore,
 51 |                     energyFunction: energyFunction,
 52 |                     using: &generator,
    |                             `- warning: capture of 'generator' with non-sendable type 'SplitMix64' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 53 |                     callback: { state in
 54 |                         states.append(state)
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/SplitMix64.swift:4:15: note: consider making struct 'SplitMix64' conform to the 'Sendable' protocol
 2 |
 3 | // Borrowed https://github.com/apple/swift-argument-parser/blob/main/Examples/roll/SplitMix64.swift
 4 | public struct SplitMix64: RandomNumberGenerator {
   |               `- note: consider making struct 'SplitMix64' conform to the 'Sendable' protocol
 5 |     private var state: UInt64
 6 |
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:54:25: warning: capture of 'states' with non-sendable type '[State]' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 52 |                     using: &generator,
 53 |                     callback: { state in
 54 |                         states.append(state)
    |                         `- warning: capture of 'states' with non-sendable type '[State]' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 55 |                         group.leave()
 56 |                     },
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/State.swift:3:8: note: consider making struct 'State' conform to the 'Sendable' protocol
 1 | import Foundation
 2 |
 3 | struct State {
   |        `- note: consider making struct 'State' conform to the 'Sendable' protocol
 4 |
 5 |     /// Creates a new state.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:52:29: warning: mutation of captured var 'generator' in concurrently-executing code; this is an error in the Swift 6 language mode
 50 |                     lastScore: lastScore,
 51 |                     energyFunction: energyFunction,
 52 |                     using: &generator,
    |                             `- warning: mutation of captured var 'generator' in concurrently-executing code; this is an error in the Swift 6 language mode
 53 |                     callback: { state in
 54 |                         states.append(state)
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:54:25: warning: capture of 'states' with non-sendable type '[State]' in an isolated closure; this is an error in the Swift 6 language mode
 52 |                     using: &generator,
 53 |                     callback: { state in
 54 |                         states.append(state)
    |                         `- warning: capture of 'states' with non-sendable type '[State]' in an isolated closure; this is an error in the Swift 6 language mode
 55 |                         group.leave()
 56 |                     },
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/State.swift:3:8: note: consider making struct 'State' conform to the 'Sendable' protocol
 1 | import Foundation
 2 |
 3 | struct State {
   |        `- note: consider making struct 'State' conform to the 'Sendable' protocol
 4 |
 5 |     /// Creates a new state.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:54:25: warning: mutation of captured var 'states' in concurrently-executing code; this is an error in the Swift 6 language mode
 52 |                     using: &generator,
 53 |                     callback: { state in
 54 |                         states.append(state)
    |                         `- warning: mutation of captured var 'states' in concurrently-executing code; this is an error in the Swift 6 language mode
 55 |                         group.leave()
 56 |                     },
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:41:38: warning: capture of 'currentBitmap' with non-sendable type 'Bitmap' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 39 |             group.enter()
 40 |             concurrentQueue.async { [targetBitmap, currentBitmap] in
 41 |                 var buffer: Bitmap = currentBitmap
    |                                      `- warning: capture of 'currentBitmap' with non-sendable type 'Bitmap' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 42 |                 bestHillClimbState(
 43 |                     shapeCreator: shapeCreator,
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/Bitmap.swift:5:15: note: consider making struct 'Bitmap' conform to the 'Sendable' protocol
  3 | /// Helper for working with bitmap data.
  4 | /// Pixels are ordered line by line, like arrays in C.
  5 | public struct Bitmap { // swiftlint:disable:this type_body_length
    |               `- note: consider making struct 'Bitmap' conform to the 'Sendable' protocol
  6 |
  7 |     /// Creates useless empty bitmap.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:43:35: warning: capture of 'shapeCreator' with non-sendable type 'ShapeCreator' (aka '(inout SplitMix64) -> any Shape') in a `@Sendable` closure; this is an error in the Swift 6 language mode
 41 |                 var buffer: Bitmap = currentBitmap
 42 |                 bestHillClimbState(
 43 |                     shapeCreator: shapeCreator,
    |                                   |- warning: capture of 'shapeCreator' with non-sendable type 'ShapeCreator' (aka '(inout SplitMix64) -> any Shape') in a `@Sendable` closure; this is an error in the Swift 6 language mode
    |                                   `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
 44 |                     alpha: alpha,
 45 |                     n: shapeCount,
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:47:29: warning: capture of 'targetBitmap' with non-sendable type 'Bitmap' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 45 |                     n: shapeCount,
 46 |                     age: maxShapeMutations,
 47 |                     target: targetBitmap,
    |                             `- warning: capture of 'targetBitmap' with non-sendable type 'Bitmap' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 48 |                     current: currentBitmap,
 49 |                     buffer: &buffer,
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/Bitmap.swift:5:15: note: consider making struct 'Bitmap' conform to the 'Sendable' protocol
  3 | /// Helper for working with bitmap data.
  4 | /// Pixels are ordered line by line, like arrays in C.
  5 | public struct Bitmap { // swiftlint:disable:this type_body_length
    |               `- note: consider making struct 'Bitmap' conform to the 'Sendable' protocol
  6 |
  7 |     /// Creates useless empty bitmap.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:51:37: warning: capture of 'energyFunction' with non-sendable type 'EnergyFunction' (aka '(Array<Scanline>, UInt8, Bitmap, Bitmap, inout Bitmap, Double) -> Double') in a `@Sendable` closure; this is an error in the Swift 6 language mode
 49 |                     buffer: &buffer,
 50 |                     lastScore: lastScore,
 51 |                     energyFunction: energyFunction,
    |                                     |- warning: capture of 'energyFunction' with non-sendable type 'EnergyFunction' (aka '(Array<Scanline>, UInt8, Bitmap, Bitmap, inout Bitmap, Double) -> Double') in a `@Sendable` closure; this is an error in the Swift 6 language mode
    |                                     `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
 52 |                     using: &generator,
 53 |                     callback: { state in
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:52:29: warning: capture of 'generator' with non-sendable type 'SplitMix64' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 50 |                     lastScore: lastScore,
 51 |                     energyFunction: energyFunction,
 52 |                     using: &generator,
    |                             `- warning: capture of 'generator' with non-sendable type 'SplitMix64' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 53 |                     callback: { state in
 54 |                         states.append(state)
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/SplitMix64.swift:4:15: note: consider making struct 'SplitMix64' conform to the 'Sendable' protocol
 2 |
 3 | // Borrowed https://github.com/apple/swift-argument-parser/blob/main/Examples/roll/SplitMix64.swift
 4 | public struct SplitMix64: RandomNumberGenerator {
   |               `- note: consider making struct 'SplitMix64' conform to the 'Sendable' protocol
 5 |     private var state: UInt64
 6 |
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:54:25: warning: capture of 'states' with non-sendable type '[State]' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 52 |                     using: &generator,
 53 |                     callback: { state in
 54 |                         states.append(state)
    |                         `- warning: capture of 'states' with non-sendable type '[State]' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 55 |                         group.leave()
 56 |                     },
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/State.swift:3:8: note: consider making struct 'State' conform to the 'Sendable' protocol
 1 | import Foundation
 2 |
 3 | struct State {
   |        `- note: consider making struct 'State' conform to the 'Sendable' protocol
 4 |
 5 |     /// Creates a new state.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:52:29: warning: mutation of captured var 'generator' in concurrently-executing code; this is an error in the Swift 6 language mode
 50 |                     lastScore: lastScore,
 51 |                     energyFunction: energyFunction,
 52 |                     using: &generator,
    |                             `- warning: mutation of captured var 'generator' in concurrently-executing code; this is an error in the Swift 6 language mode
 53 |                     callback: { state in
 54 |                         states.append(state)
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:54:25: warning: capture of 'states' with non-sendable type '[State]' in an isolated closure; this is an error in the Swift 6 language mode
 52 |                     using: &generator,
 53 |                     callback: { state in
 54 |                         states.append(state)
    |                         `- warning: capture of 'states' with non-sendable type '[State]' in an isolated closure; this is an error in the Swift 6 language mode
 55 |                         group.leave()
 56 |                     },
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/State.swift:3:8: note: consider making struct 'State' conform to the 'Sendable' protocol
 1 | import Foundation
 2 |
 3 | struct State {
   |        `- note: consider making struct 'State' conform to the 'Sendable' protocol
 4 |
 5 |     /// Creates a new state.
/Users/admin/builder/spi-builder-workspace/Sources/geometrize/GeometrizeModelHillClimb.swift:54:25: warning: mutation of captured var 'states' in concurrently-executing code; this is an error in the Swift 6 language mode
 52 |                     using: &generator,
 53 |                     callback: { state in
 54 |                         states.append(state)
    |                         `- warning: mutation of captured var 'states' in concurrently-executing code; this is an error in the Swift 6 language mode
 55 |                         group.leave()
 56 |                     },
[263/277] Compiling Geometrize State.swift
[264/277] Compiling Geometrize bresenham.swift
[265/277] Compiling Geometrize mapShapeBoundsToImage.swift
[266/277] Compiling Geometrize resource_bundle_accessor.swift
[275/284] Compiling BitmapImportExport resource_bundle_accessor.swift
[276/284] Compiling BitmapImportExport DestinationStream.swift
[277/284] Compiling BitmapImportExport JPEG.Data.Rectangular.swift
[278/284] Compiling BitmapImportExport SourceStream.swift
[279/284] Compiling BitmapImportExport Bitmap+PNG.swift
[280/284] Emitting module BitmapImportExport
[281/284] Compiling BitmapImportExport Bitmap+JPEG.swift
[282/287] Compiling geometrize_cli resource_bundle_accessor.swift
[283/287] Emitting module geometrize_cli
[284/287] Compiling geometrize_cli main.swift
[284/287] Write Objects.LinkFileList
[285/287] Linking geometrize
[286/287] Applying geometrize
Build complete! (38.35s)
warning: 'swift-algorithms': found 1 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
    /Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-algorithms/Sources/Algorithms/Documentation.docc
Build complete.
{
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      "identity" : "swift-png",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "4.4.1",
            "upper_bound" : "5.0.0"
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      "type" : "sourceControl",
      "url" : "https://github.com/tayloraswift/swift-png.git"
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      "identity" : "jpeg",
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      "type" : "sourceControl",
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      "requirement" : {
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      },
      "type" : "sourceControl",
      "url" : "https://github.com/pointfreeco/swift-snapshot-testing.git"
    },
    {
      "identity" : "swift-algorithms",
      "requirement" : {
        "range" : [
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            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
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      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-algorithms.git"
    },
    {
      "identity" : "swift-argument-parser",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.1.4",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-argument-parser.git"
    },
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      "identity" : "swiftlint",
      "requirement" : {
        "range" : [
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            "lower_bound" : "0.55.0",
            "upper_bound" : "1.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/realm/SwiftLint.git"
    }
  ],
  "manifest_display_name" : "swift-geometrize",
  "name" : "swift-geometrize",
  "path" : "/Users/admin/builder/spi-builder-workspace",
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