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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-custom-dump, reference main (7e82ed), with Swift 6.0 for macOS (SPM) on 4 Nov 2024 01:18:28 UTC.

Swift 6 data race errors: 6

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
========================================
Builder version: 4.56.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/0xLeif/swift-custom-dump.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/0xLeif/swift-custom-dump
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 7e82ed0 Merge branch 'pointfreeco:main' into main
Cloned https://github.com/0xLeif/swift-custom-dump.git
Revision (git rev-parse @):
7e82ed0d2de34933946353336dec5f210c62d658
SUCCESS checkout https://github.com/0xLeif/swift-custom-dump.git at main
Fetching https://github.com/pointfreeco/xctest-dynamic-overlay
[1/4985] Fetching xctest-dynamic-overlay
Fetched https://github.com/pointfreeco/xctest-dynamic-overlay from cache (1.61s)
Computing version for https://github.com/pointfreeco/xctest-dynamic-overlay
Computed https://github.com/pointfreeco/xctest-dynamic-overlay at 0.4.1 (0.69s)
Creating working copy for https://github.com/pointfreeco/xctest-dynamic-overlay
Working copy of https://github.com/pointfreeco/xctest-dynamic-overlay resolved at 0.4.1
========================================
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-custom-dump",
      "name": "swift-custom-dump",
      "url": "https://github.com/0xLeif/swift-custom-dump.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-custom-dump",
      "dependencies": [
        {
          "identity": "xctest-dynamic-overlay",
          "name": "xctest-dynamic-overlay",
          "url": "https://github.com/pointfreeco/xctest-dynamic-overlay",
          "version": "0.9.0",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/xctest-dynamic-overlay",
          "dependencies": [
          ]
        }
      ]
    }
  ]
}
Fetching https://github.com/0xLeif/swift-custom-dump.git
[1/1379] Fetching swift-custom-dump
Fetched https://github.com/0xLeif/swift-custom-dump.git from cache (0.87s)
Fetching https://github.com/pointfreeco/xctest-dynamic-overlay from cache
Fetched https://github.com/pointfreeco/xctest-dynamic-overlay from cache (0.46s)
Computing version for https://github.com/pointfreeco/xctest-dynamic-overlay
Computed https://github.com/pointfreeco/xctest-dynamic-overlay at 0.9.0 (0.03s)
Creating working copy for https://github.com/pointfreeco/xctest-dynamic-overlay
Working copy of https://github.com/pointfreeco/xctest-dynamic-overlay resolved at 0.9.0
Creating working copy for https://github.com/0xLeif/swift-custom-dump.git
Working copy of https://github.com/0xLeif/swift-custom-dump.git resolved at main (7e82ed0)
warning: '.resolve-product-dependencies': dependency 'swift-custom-dump' is not used by any target
Found 1 product dependencies
  - xctest-dynamic-overlay
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/0xLeif/swift-custom-dump.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
Building for debugging...
[0/3] Write sources
[2/3] Write swift-version--7754E27361AE5C74.txt
[4/9] Compiling XCTestDynamicOverlay XCTUnimplemented.swift
[5/9] Emitting module XCTestDynamicOverlay
[6/9] Compiling XCTestDynamicOverlay XCTCurrentTestCase.swift
[7/9] Compiling XCTestDynamicOverlay XCTFail.swift
[8/9] Compiling XCTestDynamicOverlay XCTIsTesting.swift
[9/9] Compiling XCTestDynamicOverlay RuntimeWarnings.swift
[10/33] Emitting module CustomDump
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Conformances/Foundation.swift:40:24: warning: static property 'formatter' is not concurrency-safe because non-'Sendable' type 'ByteCountFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
 38 |     }
 39 |
 40 |     private static let formatter: ByteCountFormatter = {
    |                        |- warning: static property 'formatter' is not concurrency-safe because non-'Sendable' type 'ByteCountFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: annotate 'formatter' 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
 41 |       let formatter = ByteCountFormatter()
 42 |       formatter.allowedUnits = .useBytes
Foundation.ByteCountFormatter:2:12: note: class 'ByteCountFormatter' does not conform to the 'Sendable' protocol
 1 | @available(macOS 10.8, *)
 2 | open class ByteCountFormatter : Formatter {
   |            `- note: class 'ByteCountFormatter' does not conform to the 'Sendable' protocol
 3 |     open class func string(fromByteCount byteCount: Int64, countStyle: ByteCountFormatter.CountStyle) -> String
 4 |     @available(swift, obsoleted: 3, renamed: "string(fromByteCount:countStyle:)")
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Conformances/KeyPath.swift:30:15: warning: var 'keyPathToName' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 28 |   }
 29 |
 30 |   private var keyPathToName: [AnyKeyPath: String] = [:]
    |               |- warning: var 'keyPathToName' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |               |- note: convert 'keyPathToName' to a 'let' constant to make 'Sendable' shared state immutable
    |               |- note: annotate 'keyPathToName' 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
 31 |
 32 |   // The source code below was extracted from the "KeyPath Reflection" branch of Apple's
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Diff.swift:591:21: warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'DiffFormat' may have shared mutable state; this is an error in the Swift 6 language mode
561 | /// This type comes with two pre-configured formats that you will probably want to use for most
562 | /// situations: ``DiffFormat/default`` and ``DiffFormat/proportional``.
563 | public struct DiffFormat {
    |               `- note: consider making struct 'DiffFormat' conform to the 'Sendable' protocol
564 |   /// A string prepended to lines that only appear in the string representation of the first value,
565 |   /// e.g. a "removal."
    :
589 |   /// Uses ascii characters for removals (hyphen "-"), insertions (plus "+"), and unchanged (space
590 |   /// " ").
591 |   public static let `default` = Self(first: "-", second: "+", both: " ")
    |                     |- warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'DiffFormat' may have shared mutable state; this is an error in the Swift 6 language mode
    |                     |- note: annotate 'default' 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
592 |
593 |   /// A diff format appropriate for where proportional (non-monospaced) fonts are used, e.g. Xcode's
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Diff.swift:599:21: warning: static property 'proportional' is not concurrency-safe because non-'Sendable' type 'DiffFormat' may have shared mutable state; this is an error in the Swift 6 language mode
561 | /// This type comes with two pre-configured formats that you will probably want to use for most
562 | /// situations: ``DiffFormat/default`` and ``DiffFormat/proportional``.
563 | public struct DiffFormat {
    |               `- note: consider making struct 'DiffFormat' conform to the 'Sendable' protocol
564 |   /// A string prepended to lines that only appear in the string representation of the first value,
565 |   /// e.g. a "removal."
    :
597 |   /// figure space (" ") for unchanged. These three characters are more likely to render with equal
598 |   /// widths in proportional fonts.
599 |   public static let proportional = Self(first: "\u{2212}", second: "+", both: "\u{2007}")
    |                     |- warning: static property 'proportional' is not concurrency-safe because non-'Sendable' type 'DiffFormat' may have shared mutable state; this is an error in the Swift 6 language mode
    |                     |- note: annotate 'proportional' 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
600 | }
601 |
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Dump.swift:63:23: warning: generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 49 | /// - Returns: The instance passed as `value`.
 50 | @discardableResult
 51 | public func customDump<T, TargetStream>(
    |                        `- note: 'T' previously declared here
 52 |   _ value: T,
 53 |   to target: inout TargetStream,
    :
 61 |   var visitedItems: Set<ObjectIdentifier> = []
 62 |
 63 |   func customDumpHelp<T, TargetStream>(
    |                       `- warning: generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 64 |     _ value: T,
 65 |     to target: inout TargetStream,
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Dump.swift:63:26: warning: generic parameter 'TargetStream' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 49 | /// - Returns: The instance passed as `value`.
 50 | @discardableResult
 51 | public func customDump<T, TargetStream>(
    |                           `- note: 'TargetStream' previously declared here
 52 |   _ value: T,
 53 |   to target: inout TargetStream,
    :
 61 |   var visitedItems: Set<ObjectIdentifier> = []
 62 |
 63 |   func customDumpHelp<T, TargetStream>(
    |                          `- warning: generic parameter 'TargetStream' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 64 |     _ value: T,
 65 |     to target: inout TargetStream,
[11/35] Compiling CustomDump AnyType.swift
[12/35] Compiling CustomDump Box.swift
[13/35] Compiling CustomDump CustomDumpRepresentable.swift
[14/35] Compiling CustomDump CustomDumpStringConvertible.swift
[15/35] Compiling CustomDump Diff.swift
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Diff.swift:591:21: warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'DiffFormat' may have shared mutable state; this is an error in the Swift 6 language mode
561 | /// This type comes with two pre-configured formats that you will probably want to use for most
562 | /// situations: ``DiffFormat/default`` and ``DiffFormat/proportional``.
563 | public struct DiffFormat {
    |               `- note: consider making struct 'DiffFormat' conform to the 'Sendable' protocol
564 |   /// A string prepended to lines that only appear in the string representation of the first value,
565 |   /// e.g. a "removal."
    :
589 |   /// Uses ascii characters for removals (hyphen "-"), insertions (plus "+"), and unchanged (space
590 |   /// " ").
591 |   public static let `default` = Self(first: "-", second: "+", both: " ")
    |                     |- warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'DiffFormat' may have shared mutable state; this is an error in the Swift 6 language mode
    |                     |- note: annotate 'default' 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
592 |
593 |   /// A diff format appropriate for where proportional (non-monospaced) fonts are used, e.g. Xcode's
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Diff.swift:599:21: warning: static property 'proportional' is not concurrency-safe because non-'Sendable' type 'DiffFormat' may have shared mutable state; this is an error in the Swift 6 language mode
561 | /// This type comes with two pre-configured formats that you will probably want to use for most
562 | /// situations: ``DiffFormat/default`` and ``DiffFormat/proportional``.
563 | public struct DiffFormat {
    |               `- note: consider making struct 'DiffFormat' conform to the 'Sendable' protocol
564 |   /// A string prepended to lines that only appear in the string representation of the first value,
565 |   /// e.g. a "removal."
    :
597 |   /// figure space (" ") for unchanged. These three characters are more likely to render with equal
598 |   /// widths in proportional fonts.
599 |   public static let proportional = Self(first: "\u{2212}", second: "+", both: "\u{2007}")
    |                     |- warning: static property 'proportional' is not concurrency-safe because non-'Sendable' type 'DiffFormat' may have shared mutable state; this is an error in the Swift 6 language mode
    |                     |- note: annotate 'proportional' 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
600 | }
601 |
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Dump.swift:63:23: warning: generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 49 | /// - Returns: The instance passed as `value`.
 50 | @discardableResult
 51 | public func customDump<T, TargetStream>(
    |                        `- note: 'T' previously declared here
 52 |   _ value: T,
 53 |   to target: inout TargetStream,
    :
 61 |   var visitedItems: Set<ObjectIdentifier> = []
 62 |
 63 |   func customDumpHelp<T, TargetStream>(
    |                       `- warning: generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 64 |     _ value: T,
 65 |     to target: inout TargetStream,
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Dump.swift:63:26: warning: generic parameter 'TargetStream' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 49 | /// - Returns: The instance passed as `value`.
 50 | @discardableResult
 51 | public func customDump<T, TargetStream>(
    |                           `- note: 'TargetStream' previously declared here
 52 |   _ value: T,
 53 |   to target: inout TargetStream,
    :
 61 |   var visitedItems: Set<ObjectIdentifier> = []
 62 |
 63 |   func customDumpHelp<T, TargetStream>(
    |                          `- warning: generic parameter 'TargetStream' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 64 |     _ value: T,
 65 |     to target: inout TargetStream,
[16/35] Compiling CustomDump Dump.swift
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Diff.swift:591:21: warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'DiffFormat' may have shared mutable state; this is an error in the Swift 6 language mode
561 | /// This type comes with two pre-configured formats that you will probably want to use for most
562 | /// situations: ``DiffFormat/default`` and ``DiffFormat/proportional``.
563 | public struct DiffFormat {
    |               `- note: consider making struct 'DiffFormat' conform to the 'Sendable' protocol
564 |   /// A string prepended to lines that only appear in the string representation of the first value,
565 |   /// e.g. a "removal."
    :
589 |   /// Uses ascii characters for removals (hyphen "-"), insertions (plus "+"), and unchanged (space
590 |   /// " ").
591 |   public static let `default` = Self(first: "-", second: "+", both: " ")
    |                     |- warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'DiffFormat' may have shared mutable state; this is an error in the Swift 6 language mode
    |                     |- note: annotate 'default' 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
592 |
593 |   /// A diff format appropriate for where proportional (non-monospaced) fonts are used, e.g. Xcode's
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Diff.swift:599:21: warning: static property 'proportional' is not concurrency-safe because non-'Sendable' type 'DiffFormat' may have shared mutable state; this is an error in the Swift 6 language mode
561 | /// This type comes with two pre-configured formats that you will probably want to use for most
562 | /// situations: ``DiffFormat/default`` and ``DiffFormat/proportional``.
563 | public struct DiffFormat {
    |               `- note: consider making struct 'DiffFormat' conform to the 'Sendable' protocol
564 |   /// A string prepended to lines that only appear in the string representation of the first value,
565 |   /// e.g. a "removal."
    :
597 |   /// figure space (" ") for unchanged. These three characters are more likely to render with equal
598 |   /// widths in proportional fonts.
599 |   public static let proportional = Self(first: "\u{2212}", second: "+", both: "\u{2007}")
    |                     |- warning: static property 'proportional' is not concurrency-safe because non-'Sendable' type 'DiffFormat' may have shared mutable state; this is an error in the Swift 6 language mode
    |                     |- note: annotate 'proportional' 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
600 | }
601 |
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Dump.swift:63:23: warning: generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 49 | /// - Returns: The instance passed as `value`.
 50 | @discardableResult
 51 | public func customDump<T, TargetStream>(
    |                        `- note: 'T' previously declared here
 52 |   _ value: T,
 53 |   to target: inout TargetStream,
    :
 61 |   var visitedItems: Set<ObjectIdentifier> = []
 62 |
 63 |   func customDumpHelp<T, TargetStream>(
    |                       `- warning: generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 64 |     _ value: T,
 65 |     to target: inout TargetStream,
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Dump.swift:63:26: warning: generic parameter 'TargetStream' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 49 | /// - Returns: The instance passed as `value`.
 50 | @discardableResult
 51 | public func customDump<T, TargetStream>(
    |                           `- note: 'TargetStream' previously declared here
 52 |   _ value: T,
 53 |   to target: inout TargetStream,
    :
 61 |   var visitedItems: Set<ObjectIdentifier> = []
 62 |
 63 |   func customDumpHelp<T, TargetStream>(
    |                          `- warning: generic parameter 'TargetStream' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 64 |     _ value: T,
 65 |     to target: inout TargetStream,
[17/35] Compiling CustomDump CollectionDifference.swift
[18/35] Compiling CustomDump Mirror.swift
[19/35] Compiling CustomDump Foundation.swift
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Conformances/Foundation.swift:40:24: warning: static property 'formatter' is not concurrency-safe because non-'Sendable' type 'ByteCountFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
 38 |     }
 39 |
 40 |     private static let formatter: ByteCountFormatter = {
    |                        |- warning: static property 'formatter' is not concurrency-safe because non-'Sendable' type 'ByteCountFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: annotate 'formatter' 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
 41 |       let formatter = ByteCountFormatter()
 42 |       formatter.allowedUnits = .useBytes
Foundation.ByteCountFormatter:2:12: note: class 'ByteCountFormatter' does not conform to the 'Sendable' protocol
 1 | @available(macOS 10.8, *)
 2 | open class ByteCountFormatter : Formatter {
   |            `- note: class 'ByteCountFormatter' does not conform to the 'Sendable' protocol
 3 |     open class func string(fromByteCount byteCount: Int64, countStyle: ByteCountFormatter.CountStyle) -> String
 4 |     @available(swift, obsoleted: 3, renamed: "string(fromByteCount:countStyle:)")
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Conformances/KeyPath.swift:30:15: warning: var 'keyPathToName' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 28 |   }
 29 |
 30 |   private var keyPathToName: [AnyKeyPath: String] = [:]
    |               |- warning: var 'keyPathToName' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |               |- note: convert 'keyPathToName' to a 'let' constant to make 'Sendable' shared state immutable
    |               |- note: annotate 'keyPathToName' 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
 31 |
 32 |   // The source code below was extracted from the "KeyPath Reflection" branch of Apple's
[20/35] Compiling CustomDump GameKit.swift
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Conformances/Foundation.swift:40:24: warning: static property 'formatter' is not concurrency-safe because non-'Sendable' type 'ByteCountFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
 38 |     }
 39 |
 40 |     private static let formatter: ByteCountFormatter = {
    |                        |- warning: static property 'formatter' is not concurrency-safe because non-'Sendable' type 'ByteCountFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: annotate 'formatter' 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
 41 |       let formatter = ByteCountFormatter()
 42 |       formatter.allowedUnits = .useBytes
Foundation.ByteCountFormatter:2:12: note: class 'ByteCountFormatter' does not conform to the 'Sendable' protocol
 1 | @available(macOS 10.8, *)
 2 | open class ByteCountFormatter : Formatter {
   |            `- note: class 'ByteCountFormatter' does not conform to the 'Sendable' protocol
 3 |     open class func string(fromByteCount byteCount: Int64, countStyle: ByteCountFormatter.CountStyle) -> String
 4 |     @available(swift, obsoleted: 3, renamed: "string(fromByteCount:countStyle:)")
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Conformances/KeyPath.swift:30:15: warning: var 'keyPathToName' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 28 |   }
 29 |
 30 |   private var keyPathToName: [AnyKeyPath: String] = [:]
    |               |- warning: var 'keyPathToName' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |               |- note: convert 'keyPathToName' to a 'let' constant to make 'Sendable' shared state immutable
    |               |- note: annotate 'keyPathToName' 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
 31 |
 32 |   // The source code below was extracted from the "KeyPath Reflection" branch of Apple's
[21/35] Compiling CustomDump KeyPath.swift
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Conformances/Foundation.swift:40:24: warning: static property 'formatter' is not concurrency-safe because non-'Sendable' type 'ByteCountFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
 38 |     }
 39 |
 40 |     private static let formatter: ByteCountFormatter = {
    |                        |- warning: static property 'formatter' is not concurrency-safe because non-'Sendable' type 'ByteCountFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: annotate 'formatter' 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
 41 |       let formatter = ByteCountFormatter()
 42 |       formatter.allowedUnits = .useBytes
Foundation.ByteCountFormatter:2:12: note: class 'ByteCountFormatter' does not conform to the 'Sendable' protocol
 1 | @available(macOS 10.8, *)
 2 | open class ByteCountFormatter : Formatter {
   |            `- note: class 'ByteCountFormatter' does not conform to the 'Sendable' protocol
 3 |     open class func string(fromByteCount byteCount: Int64, countStyle: ByteCountFormatter.CountStyle) -> String
 4 |     @available(swift, obsoleted: 3, renamed: "string(fromByteCount:countStyle:)")
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Conformances/KeyPath.swift:30:15: warning: var 'keyPathToName' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 28 |   }
 29 |
 30 |   private var keyPathToName: [AnyKeyPath: String] = [:]
    |               |- warning: var 'keyPathToName' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |               |- note: convert 'keyPathToName' to a 'let' constant to make 'Sendable' shared state immutable
    |               |- note: annotate 'keyPathToName' 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
 31 |
 32 |   // The source code below was extracted from the "KeyPath Reflection" branch of Apple's
[22/35] Compiling CustomDump String.swift
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Diff.swift:599:21: warning: static property 'proportional' is not concurrency-safe because non-'Sendable' type 'DiffFormat' may have shared mutable state; this is an error in the Swift 6 language mode
561 | /// This type comes with two pre-configured formats that you will probably want to use for most
562 | /// situations: ``DiffFormat/default`` and ``DiffFormat/proportional``.
563 | public struct DiffFormat {
    |               `- note: consider making struct 'DiffFormat' conform to the 'Sendable' protocol
564 |   /// A string prepended to lines that only appear in the string representation of the first value,
565 |   /// e.g. a "removal."
    :
597 |   /// figure space (" ") for unchanged. These three characters are more likely to render with equal
598 |   /// widths in proportional fonts.
599 |   public static let proportional = Self(first: "\u{2212}", second: "+", both: "\u{2007}")
    |                     |- warning: static property 'proportional' is not concurrency-safe because non-'Sendable' type 'DiffFormat' may have shared mutable state; this is an error in the Swift 6 language mode
    |                     |- note: annotate 'proportional' 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
600 | }
601 |
[23/35] Compiling CustomDump XCTAssertNoDifference.swift
/Users/admin/builder/spi-builder-workspace/Sources/CustomDump/Diff.swift:599:21: warning: static property 'proportional' is not concurrency-safe because non-'Sendable' type 'DiffFormat' may have shared mutable state; this is an error in the Swift 6 language mode
561 | /// This type comes with two pre-configured formats that you will probably want to use for most
562 | /// situations: ``DiffFormat/default`` and ``DiffFormat/proportional``.
563 | public struct DiffFormat {
    |               `- note: consider making struct 'DiffFormat' conform to the 'Sendable' protocol
564 |   /// A string prepended to lines that only appear in the string representation of the first value,
565 |   /// e.g. a "removal."
    :
597 |   /// figure space (" ") for unchanged. These three characters are more likely to render with equal
598 |   /// widths in proportional fonts.
599 |   public static let proportional = Self(first: "\u{2212}", second: "+", both: "\u{2007}")
    |                     |- warning: static property 'proportional' is not concurrency-safe because non-'Sendable' type 'DiffFormat' may have shared mutable state; this is an error in the Swift 6 language mode
    |                     |- note: annotate 'proportional' 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
600 | }
601 |
[24/35] Compiling CustomDump CoreImage.swift
[25/35] Compiling CustomDump CoreLocation.swift
[26/35] Compiling CustomDump CoreMotion.swift
[27/35] Compiling CustomDump Photos.swift
[28/35] Compiling CustomDump Speech.swift
[29/35] Compiling CustomDump StoreKit.swift
[30/35] Compiling CustomDump Swift.swift
[31/35] Compiling CustomDump SwiftUI.swift
[32/35] Compiling CustomDump UIKit.swift
[33/35] Compiling CustomDump UserNotifications.swift
[34/35] Compiling CustomDump UserNotificationsUI.swift
[35/35] Compiling CustomDump CustomDumpReflectable.swift
Build complete! (15.93s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "xctest-dynamic-overlay",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "0.2.0",
            "upper_bound" : "1.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/pointfreeco/xctest-dynamic-overlay"
    }
  ],
  "manifest_display_name" : "swift-custom-dump",
  "name" : "swift-custom-dump",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    }
  ],
  "products" : [
    {
      "name" : "CustomDump",
      "targets" : [
        "CustomDump"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CustomDumpTests",
      "module_type" : "SwiftTarget",
      "name" : "CustomDumpTests",
      "path" : "Tests/CustomDumpTests",
      "sources" : [
        "Conformances/CoreImageTests.swift",
        "Conformances/FoundationTests.swift",
        "Conformances/SwiftTests.swift",
        "Conformances/UIKitTests.swift",
        "Conformances/UserNotificationsTests.swift",
        "DiffTests.swift",
        "DumpTests.swift",
        "Mocks.swift",
        "XCTAssertNoDifferenceTests.swift"
      ],
      "target_dependencies" : [
        "CustomDump"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CustomDump",
      "module_type" : "SwiftTarget",
      "name" : "CustomDump",
      "path" : "Sources/CustomDump",
      "product_dependencies" : [
        "XCTestDynamicOverlay"
      ],
      "product_memberships" : [
        "CustomDump"
      ],
      "sources" : [
        "Conformances/CoreImage.swift",
        "Conformances/CoreLocation.swift",
        "Conformances/CoreMotion.swift",
        "Conformances/Foundation.swift",
        "Conformances/GameKit.swift",
        "Conformances/KeyPath.swift",
        "Conformances/Photos.swift",
        "Conformances/Speech.swift",
        "Conformances/StoreKit.swift",
        "Conformances/Swift.swift",
        "Conformances/SwiftUI.swift",
        "Conformances/UIKit.swift",
        "Conformances/UserNotifications.swift",
        "Conformances/UserNotificationsUI.swift",
        "CustomDumpReflectable.swift",
        "CustomDumpRepresentable.swift",
        "CustomDumpStringConvertible.swift",
        "Diff.swift",
        "Dump.swift",
        "Internal/AnyType.swift",
        "Internal/Box.swift",
        "Internal/CollectionDifference.swift",
        "Internal/Mirror.swift",
        "Internal/String.swift",
        "XCTAssertNoDifference.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
Done.