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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-jni, reference 0.2.1 (614139), with Swift 6.0 for Linux on 11 Apr 2025 19:55:02 UTC.

Swift 6 data race errors: 5

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.60.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/skiptools/swift-jni.git
Reference: 0.2.1
Initialized empty Git repository in /host/spi-builder-workspace/.git/
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint:
hint: 	git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint:
hint: 	git branch -m <name>
From https://github.com/skiptools/swift-jni
 * tag               0.2.1      -> FETCH_HEAD
HEAD is now at 614139a
Cloned https://github.com/skiptools/swift-jni.git
Revision (git rev-parse @):
614139a1ad5d590d89b47ec8385907e9b9284174
SUCCESS checkout https://github.com/skiptools/swift-jni.git at 0.2.1
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.0
Building package at path:  $PWD
https://github.com/skiptools/swift-jni.git
https://github.com/skiptools/swift-jni.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "swift-jni",
  "name" : "swift-jni",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SwiftJNI",
      "targets" : [
        "SwiftJNI"
      ],
      "type" : {
        "library" : [
          "dynamic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SwiftJNITests",
      "module_type" : "SwiftTarget",
      "name" : "SwiftJNITests",
      "path" : "Tests/SwiftJNITests",
      "sources" : [
        "SwiftJNITests.swift"
      ],
      "target_dependencies" : [
        "SwiftJNI"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SwiftJNI",
      "module_type" : "SwiftTarget",
      "name" : "SwiftJNI",
      "path" : "Sources/SwiftJNI",
      "product_memberships" : [
        "SwiftJNI"
      ],
      "sources" : [
        "SwiftJNI.swift"
      ],
      "target_dependencies" : [
        "CJNI"
      ],
      "type" : "library"
    },
    {
      "c99name" : "CJNI",
      "module_type" : "ClangTarget",
      "name" : "CJNI",
      "path" : "Sources/CJNI",
      "product_memberships" : [
        "SwiftJNI"
      ],
      "sources" : [
        "cjni.c"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures 2>&1
basic-6.0-latest: Pulling from finestructure/spi-images
Digest: sha256:9029076bb687edc160a3d5201c89e92dd9fa7309f33f090c4234365c83366c31
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.0-latest
Building for debugging...
[0/6] Write sources
[1/6] Compiling CJNI cjni.c
[1/6] Write swift-version-24593BA9C3E375BF.txt
[4/8] Emitting module SwiftJNI
/host/spi-builder-workspace/Sources/SwiftJNI/SwiftJNI.swift:102:23: warning: static property 'jni' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 100 | public class JNI {
 101 |     /// The single shared singleton JNI instance for the process.
 102 |     public static var jni: JNI! { // this should be set in "OnLoad" and so should always exist
     |                       |- warning: static property 'jni' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
     |                       |- note: convert 'jni' to a 'let' constant to make 'Sendable' shared state immutable
     |                       |- note: annotate 'jni' 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
 103 |         didSet {
 104 |             _ = JClassLoader.globalClassLoader // cache the global class loader on initialization
/host/spi-builder-workspace/Sources/SwiftJNI/SwiftJNI.swift:326:23: warning: static property 'kotlincompat' is not concurrency-safe because non-'Sendable' type 'JConvertibleOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 322 |
 323 | /// Java conversion options.
 324 | public struct JConvertibleOptions: OptionSet {
     |               `- note: consider making struct 'JConvertibleOptions' conform to the 'Sendable' protocol
 325 |     /// Optimize for bridging to pure Kotlin code rather than transpiled Swift.
 326 |     public static let kotlincompat = JConvertibleOptions(rawValue: 1 << 0)
     |                       |- warning: static property 'kotlincompat' is not concurrency-safe because non-'Sendable' type 'JConvertibleOptions' may have shared mutable state; this is an error in the Swift 6 language mode
     |                       |- note: annotate 'kotlincompat' 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
 327 |     /// Map to a Kotlin container type. Useful for passing an array or dictionary to a known List or Map, even when content might
 328 |     /// not be expected to be `.kotlincompat`.
/host/spi-builder-workspace/Sources/SwiftJNI/SwiftJNI.swift:329:23: warning: static property 'kotlincompatContainer' is not concurrency-safe because non-'Sendable' type 'JConvertibleOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 322 |
 323 | /// Java conversion options.
 324 | public struct JConvertibleOptions: OptionSet {
     |               `- note: consider making struct 'JConvertibleOptions' conform to the 'Sendable' protocol
 325 |     /// Optimize for bridging to pure Kotlin code rather than transpiled Swift.
 326 |     public static let kotlincompat = JConvertibleOptions(rawValue: 1 << 0)
 327 |     /// Map to a Kotlin container type. Useful for passing an array or dictionary to a known List or Map, even when content might
 328 |     /// not be expected to be `.kotlincompat`.
 329 |     public static let kotlincompatContainer = JConvertibleOptions(rawValue: 1 << 1)
     |                       |- warning: static property 'kotlincompatContainer' is not concurrency-safe because non-'Sendable' type 'JConvertibleOptions' may have shared mutable state; this is an error in the Swift 6 language mode
     |                       |- note: annotate 'kotlincompatContainer' 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
 330 |
 331 |     public let rawValue: Int
/host/spi-builder-workspace/Sources/SwiftJNI/SwiftJNI.swift:633:23: warning: static property 'errorConverter' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 631 |     private static let javaErrorExceptionConstructor = javaErrorExceptionClass.getMethodID(name: "<init>", sig: "(Ljava/lang/String;)V")!
 632 |     /// Handles converting the error pointer into the error that will ultimately be thrown
 633 |     public static var errorConverter: ((JavaObjectPointer, JConvertibleOptions) -> Error?) = { ptr, options in descriptionToError(ptr, options: options) }
     |                       |- warning: static property 'errorConverter' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
     |                       |- note: convert 'errorConverter' to a 'let' constant to make 'Sendable' shared state immutable
     |                       |- note: annotate 'errorConverter' 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
 634 |
 635 |     public static func toError(_ ptr: JavaObjectPointer?, options: JConvertibleOptions) -> Error? {
/host/spi-builder-workspace/Sources/SwiftJNI/SwiftJNI.swift:1099:23: warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'JVMOptions' may have shared mutable state; this is an error in the Swift 6 language mode
1096 | // MARK: JVM Management
1097 |
1098 | public struct JVMOptions {
     |               `- note: consider making struct 'JVMOptions' conform to the 'Sendable' protocol
1099 |     public static let `default` = JVMOptions()
     |                       |- warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'JVMOptions' 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
1100 |
1101 |     public var verboseGarbageCollection = false
[5/8] Compiling SwiftJNI SwiftJNI.swift
/host/spi-builder-workspace/Sources/SwiftJNI/SwiftJNI.swift:102:23: warning: static property 'jni' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 100 | public class JNI {
 101 |     /// The single shared singleton JNI instance for the process.
 102 |     public static var jni: JNI! { // this should be set in "OnLoad" and so should always exist
     |                       |- warning: static property 'jni' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
     |                       |- note: convert 'jni' to a 'let' constant to make 'Sendable' shared state immutable
     |                       |- note: annotate 'jni' 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
 103 |         didSet {
 104 |             _ = JClassLoader.globalClassLoader // cache the global class loader on initialization
/host/spi-builder-workspace/Sources/SwiftJNI/SwiftJNI.swift:326:23: warning: static property 'kotlincompat' is not concurrency-safe because non-'Sendable' type 'JConvertibleOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 322 |
 323 | /// Java conversion options.
 324 | public struct JConvertibleOptions: OptionSet {
     |               `- note: consider making struct 'JConvertibleOptions' conform to the 'Sendable' protocol
 325 |     /// Optimize for bridging to pure Kotlin code rather than transpiled Swift.
 326 |     public static let kotlincompat = JConvertibleOptions(rawValue: 1 << 0)
     |                       |- warning: static property 'kotlincompat' is not concurrency-safe because non-'Sendable' type 'JConvertibleOptions' may have shared mutable state; this is an error in the Swift 6 language mode
     |                       |- note: annotate 'kotlincompat' 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
 327 |     /// Map to a Kotlin container type. Useful for passing an array or dictionary to a known List or Map, even when content might
 328 |     /// not be expected to be `.kotlincompat`.
/host/spi-builder-workspace/Sources/SwiftJNI/SwiftJNI.swift:329:23: warning: static property 'kotlincompatContainer' is not concurrency-safe because non-'Sendable' type 'JConvertibleOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 322 |
 323 | /// Java conversion options.
 324 | public struct JConvertibleOptions: OptionSet {
     |               `- note: consider making struct 'JConvertibleOptions' conform to the 'Sendable' protocol
 325 |     /// Optimize for bridging to pure Kotlin code rather than transpiled Swift.
 326 |     public static let kotlincompat = JConvertibleOptions(rawValue: 1 << 0)
 327 |     /// Map to a Kotlin container type. Useful for passing an array or dictionary to a known List or Map, even when content might
 328 |     /// not be expected to be `.kotlincompat`.
 329 |     public static let kotlincompatContainer = JConvertibleOptions(rawValue: 1 << 1)
     |                       |- warning: static property 'kotlincompatContainer' is not concurrency-safe because non-'Sendable' type 'JConvertibleOptions' may have shared mutable state; this is an error in the Swift 6 language mode
     |                       |- note: annotate 'kotlincompatContainer' 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
 330 |
 331 |     public let rawValue: Int
/host/spi-builder-workspace/Sources/SwiftJNI/SwiftJNI.swift:633:23: warning: static property 'errorConverter' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 631 |     private static let javaErrorExceptionConstructor = javaErrorExceptionClass.getMethodID(name: "<init>", sig: "(Ljava/lang/String;)V")!
 632 |     /// Handles converting the error pointer into the error that will ultimately be thrown
 633 |     public static var errorConverter: ((JavaObjectPointer, JConvertibleOptions) -> Error?) = { ptr, options in descriptionToError(ptr, options: options) }
     |                       |- warning: static property 'errorConverter' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
     |                       |- note: convert 'errorConverter' to a 'let' constant to make 'Sendable' shared state immutable
     |                       |- note: annotate 'errorConverter' 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
 634 |
 635 |     public static func toError(_ ptr: JavaObjectPointer?, options: JConvertibleOptions) -> Error? {
/host/spi-builder-workspace/Sources/SwiftJNI/SwiftJNI.swift:1099:23: warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'JVMOptions' may have shared mutable state; this is an error in the Swift 6 language mode
1096 | // MARK: JVM Management
1097 |
1098 | public struct JVMOptions {
     |               `- note: consider making struct 'JVMOptions' conform to the 'Sendable' protocol
1099 |     public static let `default` = JVMOptions()
     |                       |- warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'JVMOptions' 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
1100 |
1101 |     public var verboseGarbageCollection = false
[6/9] Wrapping AST for SwiftJNI for debugging
[7/9] Write Objects.LinkFileList
[8/9] Linking libSwiftJNI.so
Build complete! (9.42s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "swift-jni",
  "name" : "swift-jni",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SwiftJNI",
      "targets" : [
        "SwiftJNI"
      ],
      "type" : {
        "library" : [
          "dynamic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SwiftJNITests",
      "module_type" : "SwiftTarget",
      "name" : "SwiftJNITests",
      "path" : "Tests/SwiftJNITests",
      "sources" : [
        "SwiftJNITests.swift"
      ],
      "target_dependencies" : [
        "SwiftJNI"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SwiftJNI",
      "module_type" : "SwiftTarget",
      "name" : "SwiftJNI",
      "path" : "Sources/SwiftJNI",
      "product_memberships" : [
        "SwiftJNI"
      ],
      "sources" : [
        "SwiftJNI.swift"
      ],
      "target_dependencies" : [
        "CJNI"
      ],
      "type" : "library"
    },
    {
      "c99name" : "CJNI",
      "module_type" : "ClangTarget",
      "name" : "CJNI",
      "path" : "Sources/CJNI",
      "product_memberships" : [
        "SwiftJNI"
      ],
      "sources" : [
        "cjni.c"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
basic-6.0-latest: Pulling from finestructure/spi-images
Digest: sha256:9029076bb687edc160a3d5201c89e92dd9fa7309f33f090c4234365c83366c31
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.0-latest
Done.