Swift Package IndexBuild Information
Successful build of CombineExtensions, reference main (fc80f3), with Swift 6.1 for macOS (SPM) on 19 Jul 2026 00:18:58 UTC.
Swift 6 data race errors: 2
Build Command
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -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 InferSendableFromCapturesBuild Log
========================================
RunAll
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Builder version: undefined version: run 'make version' to update
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/shareup/combine-extensions.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/shareup/combine-extensions
* branch main -> FETCH_HEAD
* [new branch] main -> origin/main
HEAD is now at fc80f31 Add WallClockScheduler (#32)
Cloned https://github.com/shareup/combine-extensions.git
Revision (git rev-parse @):
fc80f31fc9f6fdc3c8a9763f8b4feacff2452743
SUCCESS checkout https://github.com/shareup/combine-extensions.git at main
========================================
Build
========================================
Selected platform: macosSpm
Swift version: 6.1
Building package at path: $PWD
https://github.com/shareup/combine-extensions.git
https://github.com/shareup/combine-extensions.git
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"KeyedSubscriptionStoreTests.swift",
"MulticastLatestTests.swift",
"OnCancelTests.swift",
"OutputStreamPublisherTests.swift",
"PublisherSinkTests.swift",
"PublisherTestExtensionsTests.swift",
"ReduceLatestTests.swift",
"RetryIfTests.swift",
"SingleSubscriptionStoreTests.swift",
"TestSchedulerTests.swift",
"ThrottleWhileTests.swift",
"UISchedulerTests.swift",
"WallClockSchedulerTests.swift"
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Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -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
Building for debugging...
[0/6] Write sources
[3/6] Write swift-version-2F0A5646E1D333AE.txt
[5/12] Emitting module Synchronized
[6/12] Compiling Synchronized RecursiveLock.swift
[7/12] Compiling Synchronized Lock.swift
[8/12] Compiling Synchronized Locked.swift
[9/30] Compiling CombineExtensions OnCancel.swift
[10/30] Compiling CombineExtensions OutputStreamPublisher.swift
[11/30] Compiling CombineExtensions KeyedSubscriptionStore.swift
[12/30] Compiling CombineExtensions MulticastLatest.swift
[13/30] Compiling CombineExtensions Enumerated.swift
[14/30] Compiling CombineExtensions InputStreamPublisher.swift
[15/30] Compiling CombineExtensions RetryIf.swift
[16/30] Compiling CombineExtensions SingleSubscriptionStore.swift
[17/31] Compiling CombineExtensions TestScheduler.swift
[18/31] Compiling CombineExtensions ThrottleWhile.swift
[19/31] Compiling CombineExtensions BufferPassthroughSubject.swift
[20/31] Compiling CombineExtensions Distinct.swift
[21/31] Compiling CombineExtensions UIScheduler.swift
/Users/admin/builder/spi-builder-workspace/Sources/CombineExtensions/UIScheduler.swift:16:23: warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'UIScheduler' may have shared mutable state; this is an error in the Swift 6 language mode
7 | /// https://github.com/pointfreeco/combine-schedulers/blob/main/Sources/CombineSchedulers/UIScheduler.swift
8 | ///
9 | public struct UIScheduler: Scheduler {
| `- note: consider making struct 'UIScheduler' conform to the 'Sendable' protocol
10 | public typealias SchedulerOptions = Never
11 | public typealias SchedulerTimeType = DispatchQueue.SchedulerTimeType
:
14 | ///
15 | /// You cannot create instances of the UI scheduler yourself. Use only the shared instance.
16 | public static let shared = Self()
| |- warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'UIScheduler' may have shared mutable state; this is an error in the Swift 6 language mode
| |- note: add '@MainActor' to make static property 'shared' part of global actor 'MainActor'
| `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
17 |
18 | public var now: SchedulerTimeType { DispatchQueue.main.now }
/Users/admin/builder/spi-builder-workspace/Sources/CombineExtensions/UIScheduler.swift:65:13: warning: var 'setSpecific' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
63 | private let key = DispatchSpecificKey<UInt8>()
64 | private let value: UInt8 = 0
65 | private var setSpecific: () = { DispatchQueue.main.setSpecific(key: key, value: value) }()
| |- warning: var 'setSpecific' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
| |- note: convert 'setSpecific' to a 'let' constant to make 'Sendable' shared state immutable
| |- note: add '@MainActor' to make var 'setSpecific' part of global actor 'MainActor'
| `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
66 |
[22/31] Compiling CombineExtensions Publisher+Sink.swift
[23/31] Compiling CombineExtensions ReduceLatest.swift
[24/31] Emitting module CombineExtensions
/Users/admin/builder/spi-builder-workspace/Sources/CombineExtensions/UIScheduler.swift:16:23: warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'UIScheduler' may have shared mutable state; this is an error in the Swift 6 language mode
7 | /// https://github.com/pointfreeco/combine-schedulers/blob/main/Sources/CombineSchedulers/UIScheduler.swift
8 | ///
9 | public struct UIScheduler: Scheduler {
| `- note: consider making struct 'UIScheduler' conform to the 'Sendable' protocol
10 | public typealias SchedulerOptions = Never
11 | public typealias SchedulerTimeType = DispatchQueue.SchedulerTimeType
:
14 | ///
15 | /// You cannot create instances of the UI scheduler yourself. Use only the shared instance.
16 | public static let shared = Self()
| |- warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'UIScheduler' may have shared mutable state; this is an error in the Swift 6 language mode
| |- note: add '@MainActor' to make static property 'shared' part of global actor 'MainActor'
| `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
17 |
18 | public var now: SchedulerTimeType { DispatchQueue.main.now }
/Users/admin/builder/spi-builder-workspace/Sources/CombineExtensions/UIScheduler.swift:65:13: warning: var 'setSpecific' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
63 | private let key = DispatchSpecificKey<UInt8>()
64 | private let value: UInt8 = 0
65 | private var setSpecific: () = { DispatchQueue.main.setSpecific(key: key, value: value) }()
| |- warning: var 'setSpecific' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
| |- note: convert 'setSpecific' to a 'let' constant to make 'Sendable' shared state immutable
| |- note: add '@MainActor' to make var 'setSpecific' part of global actor 'MainActor'
| `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
66 |
[25/31] Compiling CombineExtensions AgainAt.swift
[26/31] Compiling CombineExtensions AnyConnectablePublisher.swift
[27/31] Compiling CombineExtensions WallClockScheduler.swift
/Users/admin/builder/spi-builder-workspace/Sources/CombineExtensions/WallClockScheduler.swift:68:13: warning: capture of 'action' with non-sendable type '() -> Void' in a '@Sendable' closure
66 | ) {
67 | defer { options.group?.leave() }
68 | action()
| |- warning: capture of 'action' with non-sendable type '() -> Void' in a '@Sendable' closure
| `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
69 | }
70 | }
/Users/admin/builder/spi-builder-workspace/Sources/CombineExtensions/WallClockScheduler.swift:100:13: warning: capture of 'action' with non-sendable type '() -> Void' in a '@Sendable' closure
98 | ) {
99 | defer { options.group?.leave() }
100 | action()
| |- warning: capture of 'action' with non-sendable type '() -> Void' in a '@Sendable' closure
| `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
101 | }
102 | }
[28/31] Emitting module CombineTestExtensions
[29/31] Compiling CombineTestExtensions Publisher+Test.swift
[29/31] Write Objects.LinkFileList
[30/31] Linking libCombineTestExtensions.dylib
Build complete! (12.16s)
Fetching https://github.com/shareup/synchronized.git
[1/226] Fetching synchronized
Fetched https://github.com/shareup/synchronized.git from cache (0.64s)
Computing version for https://github.com/shareup/synchronized.git
Computed https://github.com/shareup/synchronized.git at 4.0.1 (1.24s)
Creating working copy for https://github.com/shareup/synchronized.git
Working copy of https://github.com/shareup/synchronized.git resolved at 4.0.1
Build complete.
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Done.