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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

Failed to build LightweightObservable with Swift 5.10 for macOS (SPM).

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.3.0-Beta.2.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
========================================
Builder version: 4.29.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/fxm90/LightweightObservable.git
Reference: main
Initialized empty Git repository in /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.git/
From https://github.com/fxm90/LightweightObservable
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at a54bfdc Refactor CI setup (#10)
Cloned https://github.com/fxm90/LightweightObservable.git
Revision (git rev-parse @):
a54bfdcffe8aca708f78cc7fea222ed593d7abd3
SUCCESS checkout https://github.com/fxm90/LightweightObservable.git at main
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             5.10
Building package at path:  $workDir
https://github.com/fxm90/LightweightObservable.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.3.0-Beta.2.app xcrun swift build --arch arm64
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version--423B1241ED78D482.txt
[3/8] Compiling LightweightObservable Observable+Equatable.swift
[4/8] Compiling LightweightObservable Observable+Combine.swift
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:24:28: error: 'Subscriber' is only available in macOS 10.15 or newer
    public func receive<S: Subscriber>(subscriber: S) where S.Input == Output, S.Failure == Failure {
                           ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:24:17: note: add @available attribute to enclosing instance method
    public func receive<S: Subscriber>(subscriber: S) where S.Input == Output, S.Failure == Failure {
                ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:15:1: note: add @available attribute to enclosing extension
extension Observable: Publisher {
^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:39:33: error: 'Subscriber' is only available in macOS 10.15 or newer
    final class Subscription<S: Subscriber> where S.Input == Output, S.Failure == Failure {
                                ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:39:17: note: add @available attribute to enclosing generic class
    final class Subscription<S: Subscriber> where S.Input == Output, S.Failure == Failure {
                ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:39:17: note: add @available attribute to enclosing generic class
    final class Subscription<S: Subscriber> where S.Input == Output, S.Failure == Failure {
                ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:67:21: error: 'Subscribers' is only available in macOS 10.15 or newer
    func request(_: Subscribers.Demand) {
                    ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:67:10: note: add @available attribute to enclosing instance method
    func request(_: Subscribers.Demand) {
         ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:66:1: note: add @available attribute to enclosing extension
extension Observable.Subscription: Subscription {
^
error: emit-module command failed with exit code 1 (use -v to see invocation)
[5/8] Compiling LightweightObservable Disposable.swift
[6/8] Compiling LightweightObservable Observable+KeyPath.swift
[7/8] Compiling LightweightObservable Observable.swift
[8/8] Emitting module LightweightObservable
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:24:28: error: 'Subscriber' is only available in macOS 10.15 or newer
    public func receive<S: Subscriber>(subscriber: S) where S.Input == Output, S.Failure == Failure {
                           ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:24:17: note: add @available attribute to enclosing instance method
    public func receive<S: Subscriber>(subscriber: S) where S.Input == Output, S.Failure == Failure {
                ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:15:1: note: add @available attribute to enclosing extension
extension Observable: Publisher {
^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:39:33: error: 'Subscriber' is only available in macOS 10.15 or newer
    final class Subscription<S: Subscriber> where S.Input == Output, S.Failure == Failure {
                                ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:39:17: note: add @available attribute to enclosing generic class
    final class Subscription<S: Subscriber> where S.Input == Output, S.Failure == Failure {
                ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:39:17: note: add @available attribute to enclosing generic class
    final class Subscription<S: Subscriber> where S.Input == Output, S.Failure == Failure {
                ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:67:21: error: 'Subscribers' is only available in macOS 10.15 or newer
    func request(_: Subscribers.Demand) {
                    ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:67:10: note: add @available attribute to enclosing instance method
    func request(_: Subscribers.Demand) {
         ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:66:1: note: add @available attribute to enclosing extension
extension Observable.Subscription: Subscription {
^
error: fatalError
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version--423B1241ED78D482.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[2/3] Emitting module LightweightObservable
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:24:28: error: 'Subscriber' is only available in macOS 10.15 or newer
    public func receive<S: Subscriber>(subscriber: S) where S.Input == Output, S.Failure == Failure {
                           ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:24:17: note: add @available attribute to enclosing instance method
    public func receive<S: Subscriber>(subscriber: S) where S.Input == Output, S.Failure == Failure {
                ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:15:1: note: add @available attribute to enclosing extension
extension Observable: Publisher {
^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:39:33: error: 'Subscriber' is only available in macOS 10.15 or newer
    final class Subscription<S: Subscriber> where S.Input == Output, S.Failure == Failure {
                                ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:39:17: note: add @available attribute to enclosing generic class
    final class Subscription<S: Subscriber> where S.Input == Output, S.Failure == Failure {
                ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:39:17: note: add @available attribute to enclosing generic class
    final class Subscription<S: Subscriber> where S.Input == Output, S.Failure == Failure {
                ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:67:21: error: 'Subscribers' is only available in macOS 10.15 or newer
    func request(_: Subscribers.Demand) {
                    ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:67:10: note: add @available attribute to enclosing instance method
    func request(_: Subscribers.Demand) {
         ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:66:1: note: add @available attribute to enclosing extension
extension Observable.Subscription: Subscription {
^
[3/3] Compiling LightweightObservable Observable+Combine.swift
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:24:28: error: 'Subscriber' is only available in macOS 10.15 or newer
    public func receive<S: Subscriber>(subscriber: S) where S.Input == Output, S.Failure == Failure {
                           ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:24:17: note: add @available attribute to enclosing instance method
    public func receive<S: Subscriber>(subscriber: S) where S.Input == Output, S.Failure == Failure {
                ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:15:1: note: add @available attribute to enclosing extension
extension Observable: Publisher {
^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:39:33: error: 'Subscriber' is only available in macOS 10.15 or newer
    final class Subscription<S: Subscriber> where S.Input == Output, S.Failure == Failure {
                                ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:39:17: note: add @available attribute to enclosing generic class
    final class Subscription<S: Subscriber> where S.Input == Output, S.Failure == Failure {
                ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:39:17: note: add @available attribute to enclosing generic class
    final class Subscription<S: Subscriber> where S.Input == Output, S.Failure == Failure {
                ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:67:21: error: 'Subscribers' is only available in macOS 10.15 or newer
    func request(_: Subscribers.Demand) {
                    ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:67:10: note: add @available attribute to enclosing instance method
    func request(_: Subscribers.Demand) {
         ^
/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/LightweightObservable/Sources/Extensions/Observable+Combine.swift:66:1: note: add @available attribute to enclosing extension
extension Observable.Subscription: Subscription {
^
error: fatalError
BUILD FAILURE 5.10 macosSpm