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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 Scout with Swift 6.0 for macOS (SPM).

Swift 6 data race errors: 3

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.3.0.app xcrun --toolchain org.swift.600202405261a swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete

Build Log

========================================
RunAll
========================================
Builder version: 4.40.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/bgerstle/scout.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/bgerstle/scout
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 76a53a4 Playground tweaks
Cloned https://github.com/bgerstle/scout.git
Revision (git rev-parse @):
76a53a47461f3dec6b63bcac4db50e7947a0c2c5
SUCCESS checkout https://github.com/bgerstle/scout.git at master
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $workDir
https://github.com/bgerstle/scout.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.3.0.app xcrun --toolchain org.swift.600202405261a swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-6F35C1178C84523A.txt
[3/12] Compiling Scout ExpectVarDSL.swift
[4/13] Compiling Scout Mockable.swift
[5/13] Compiling Scout Mock.swift
[6/13] Compiling Scout CallDSL.swift
[7/13] Compiling Scout Expectation.swift
<unknown>:0: note: a function type must be marked '@Sendable' to conform to 'Sendable'
/Users/admin/builder/spi-builder-workspace/Sources/Scout/Expect/Expectation.swift:23:5: warning: let 'returnValue' is not concurrency-safe because non-'Sendable' type '(Any?, UInt) -> any Expectation' may have shared mutable state; this is an error in the Swift 6 language mode
 21 |
 22 | // Alias for `return` if people don't want to use backticks.
 23 | let returnValue = `return`
    |     |- warning: let 'returnValue' is not concurrency-safe because non-'Sendable' type '(Any?, UInt) -> any Expectation' may have shared mutable state; this is an error in the Swift 6 language mode
    |     |- note: annotate 'returnValue' 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
 24 |
 25 | /// Return the same value every time.
/Users/admin/builder/spi-builder-workspace/Sources/Scout/Expect/Expectation.swift:48:30: warning: using 'class' keyword to define a class-constrained protocol is deprecated; use 'AnyObject' instead
 46 |
 47 | // Interface for all expectations of a mock.
 48 | public protocol Expectation: class {
    |                              `- warning: using 'class' keyword to define a class-constrained protocol is deprecated; use 'AnyObject' instead
 49 |     func hasNext() -> Bool
 50 |     func nextValue() -> Any?
[8/13] Compiling Scout MockFailure.swift
[9/13] Compiling Scout ExpectDSL.swift
[10/13] Compiling Scout ArgMatcher.swift
/Users/admin/builder/spi-builder-workspace/Sources/Scout/Expect/ArgMatcher.swift:15:5: warning: let 'nil' is not concurrency-safe because non-'Sendable' type 'NilMatcher' may have shared mutable state; this is an error in the Swift 6 language mode
13 | }
14 |
15 | let `nil` = NilMatcher()
   |     |- warning: let 'nil' is not concurrency-safe because non-'Sendable' type 'NilMatcher' may have shared mutable state; this is an error in the Swift 6 language mode
   |     |- note: annotate 'nil' 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
16 |
17 | class NilMatcher : ArgMatcher {
   |       `- note: class 'NilMatcher' does not conform to the 'Sendable' protocol
18 |     public func matches(arg: Any?) -> Bool {
19 |         return arg == nil
[11/13] Emitting module Scout
/Users/admin/builder/spi-builder-workspace/Sources/Scout/Expect/ArgMatcher.swift:15:5: warning: let 'nil' is not concurrency-safe because non-'Sendable' type 'NilMatcher' may have shared mutable state; this is an error in the Swift 6 language mode
13 | }
14 |
15 | let `nil` = NilMatcher()
   |     |- warning: let 'nil' is not concurrency-safe because non-'Sendable' type 'NilMatcher' may have shared mutable state; this is an error in the Swift 6 language mode
   |     |- note: annotate 'nil' 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
16 |
17 | class NilMatcher : ArgMatcher {
   |       `- note: class 'NilMatcher' does not conform to the 'Sendable' protocol
18 |     public func matches(arg: Any?) -> Bool {
19 |         return arg == nil
<unknown>:0: note: a function type must be marked '@Sendable' to conform to 'Sendable'
/Users/admin/builder/spi-builder-workspace/Sources/Scout/Expect/ExpectFuncDSL.swift:128:5: warning: let 'throwError' is not concurrency-safe because non-'Sendable' type '(@autoclosure @escaping () -> any Error) -> FuncExpectationBlock' (aka '(@autoclosure @escaping () -> any Error) -> (KeyValuePairs<String, Optional<Any>>) throws -> Optional<Any>') may have shared mutable state; this is an error in the Swift 6 language mode
126 |
127 | // Alias in case backticks aren't desired.
128 | let throwError = `throw`
    |     |- warning: let 'throwError' is not concurrency-safe because non-'Sendable' type '(@autoclosure @escaping () -> any Error) -> FuncExpectationBlock' (aka '(@autoclosure @escaping () -> any Error) -> (KeyValuePairs<String, Optional<Any>>) throws -> Optional<Any>') may have shared mutable state; this is an error in the Swift 6 language mode
    |     |- note: annotate 'throwError' 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
129 |
130 | protocol MockFuncContext {
<unknown>:0: note: a function type must be marked '@Sendable' to conform to 'Sendable'
/Users/admin/builder/spi-builder-workspace/Sources/Scout/Expect/Expectation.swift:23:5: warning: let 'returnValue' is not concurrency-safe because non-'Sendable' type '(Any?, UInt) -> any Expectation' may have shared mutable state; this is an error in the Swift 6 language mode
 21 |
 22 | // Alias for `return` if people don't want to use backticks.
 23 | let returnValue = `return`
    |     |- warning: let 'returnValue' is not concurrency-safe because non-'Sendable' type '(Any?, UInt) -> any Expectation' may have shared mutable state; this is an error in the Swift 6 language mode
    |     |- note: annotate 'returnValue' 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
 24 |
 25 | /// Return the same value every time.
/Users/admin/builder/spi-builder-workspace/Sources/Scout/Expect/Expectation.swift:48:30: warning: using 'class' keyword to define a class-constrained protocol is deprecated; use 'AnyObject' instead
 46 |
 47 | // Interface for all expectations of a mock.
 48 | public protocol Expectation: class {
    |                              `- warning: using 'class' keyword to define a class-constrained protocol is deprecated; use 'AnyObject' instead
 49 |     func hasNext() -> Bool
 50 |     func nextValue() -> Any?
[12/13] Compiling Scout ExpectFuncDSL.swift
<unknown>:0: note: a function type must be marked '@Sendable' to conform to 'Sendable'
/Users/admin/builder/spi-builder-workspace/Sources/Scout/Expect/ExpectFuncDSL.swift:128:5: warning: let 'throwError' is not concurrency-safe because non-'Sendable' type '(@autoclosure @escaping () -> any Error) -> FuncExpectationBlock' (aka '(@autoclosure @escaping () -> any Error) -> (KeyValuePairs<String, Optional<Any>>) throws -> Optional<Any>') may have shared mutable state; this is an error in the Swift 6 language mode
126 |
127 | // Alias in case backticks aren't desired.
128 | let throwError = `throw`
    |     |- warning: let 'throwError' is not concurrency-safe because non-'Sendable' type '(@autoclosure @escaping () -> any Error) -> FuncExpectationBlock' (aka '(@autoclosure @escaping () -> any Error) -> (KeyValuePairs<String, Optional<Any>>) throws -> Optional<Any>') may have shared mutable state; this is an error in the Swift 6 language mode
    |     |- note: annotate 'throwError' 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
129 |
130 | protocol MockFuncContext {
[13/13] Compiling Scout VarDSL.swift
Build complete! (32.05s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Scout",
  "name" : "Scout",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Scout",
      "targets" : [
        "Scout"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ScoutTests",
      "module_type" : "SwiftTarget",
      "name" : "ScoutTests",
      "path" : "Tests/ScoutTests",
      "sources" : [
        "Func/ArgMatcherTests.swift",
        "Func/ExpectFuncTests.swift",
        "Helpers/MockExample.swift",
        "Helpers/ScoutTestCase.swift",
        "Mock/MockAssertionTests.swift",
        "Var/ExpectVarTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Scout"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Scout",
      "module_type" : "SwiftTarget",
      "name" : "Scout",
      "path" : "Sources/Scout",
      "product_memberships" : [
        "Scout"
      ],
      "sources" : [
        "Expect/ArgMatcher.swift",
        "Expect/ExpectDSL.swift",
        "Expect/ExpectFuncDSL.swift",
        "Expect/ExpectVarDSL.swift",
        "Expect/Expectation.swift",
        "Mock/CallDSL.swift",
        "Mock/Mock.swift",
        "Mock/MockFailure.swift",
        "Mock/Mockable.swift",
        "Mock/VarDSL.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Done.
This is a staging environment. For live and up-to-date package information, visit swiftpackageindex.com.