Swift Package IndexBuild Information
Failed to build Apple-Docs-MCP, reference main (ec17f7), with Swift 6.3 for macOS (SPM) on 18 Apr 2026 10:05:35 UTC.
Build Command
env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun swift build --arch arm64Build Log
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RunAll
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Builder version: 4.70.0
Interrupt handler set up.
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Checkout
========================================
Clone URL: https://github.com/justindal/Apple-Docs-MCP.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/justindal/Apple-Docs-MCP
* branch main -> FETCH_HEAD
* [new branch] main -> origin/main
HEAD is now at ec17f7b docs: update readme
Cloned https://github.com/justindal/Apple-Docs-MCP.git
Revision (git rev-parse @):
ec17f7b6940dc73478074a648a1ed59d6e87c212
SUCCESS checkout https://github.com/justindal/Apple-Docs-MCP.git at main
Fetching https://github.com/apple/swift-system.git
Fetching https://github.com/mattt/eventsource.git
Fetching https://github.com/apple/swift-async-algorithms.git
Fetching https://github.com/swift-server/swift-service-lifecycle.git
Fetching https://github.com/apple/swift-log.git
Fetching https://github.com/apple/swift-collections.git
Fetching https://github.com/modelcontextprotocol/swift-sdk.git
[1/271] Fetching eventsource
[129/3016] Fetching eventsource, swift-service-lifecycle
[437/26585] Fetching eventsource, swift-service-lifecycle, swift-collections
[438/32186] Fetching eventsource, swift-service-lifecycle, swift-collections, swift-system
[439/35659] Fetching eventsource, swift-service-lifecycle, swift-collections, swift-system, swift-sdk
[911/41906] Fetching eventsource, swift-service-lifecycle, swift-collections, swift-system, swift-sdk, swift-async-algorithms
[1484/48541] Fetching eventsource, swift-service-lifecycle, swift-collections, swift-system, swift-sdk, swift-async-algorithms, swift-log
Fetched https://github.com/apple/swift-async-algorithms.git from cache (2.12s)
Fetched https://github.com/apple/swift-log.git from cache (2.12s)
Fetched https://github.com/swift-server/swift-service-lifecycle.git from cache (2.12s)
Fetched https://github.com/modelcontextprotocol/swift-sdk.git from cache (2.12s)
Computing version for https://github.com/swift-server/swift-service-lifecycle.git
Fetched https://github.com/apple/swift-collections.git from cache (2.12s)
Fetched https://github.com/mattt/eventsource.git from cache (2.13s)
Fetched https://github.com/apple/swift-system.git from cache (2.13s)
Computed https://github.com/swift-server/swift-service-lifecycle.git at 2.9.1 (2.75s)
Computing version for https://github.com/modelcontextprotocol/swift-sdk.git
Computed https://github.com/modelcontextprotocol/swift-sdk.git at 0.10.2 (0.59s)
Computing version for https://github.com/apple/swift-async-algorithms.git
Computed https://github.com/apple/swift-async-algorithms.git at 1.1.1 (0.61s)
Computing version for https://github.com/apple/swift-log.git
Computed https://github.com/apple/swift-log.git at 1.9.1 (0.58s)
Computing version for https://github.com/mattt/eventsource.git
Computed https://github.com/mattt/eventsource.git at 1.3.0 (0.56s)
Computing version for https://github.com/apple/swift-system.git
Computed https://github.com/apple/swift-system.git at 1.6.4 (0.59s)
Computing version for https://github.com/apple/swift-collections.git
Computed https://github.com/apple/swift-collections.git at 1.3.0 (0.65s)
Creating working copy for https://github.com/apple/swift-system.git
Working copy of https://github.com/apple/swift-system.git resolved at 1.6.4
Creating working copy for https://github.com/apple/swift-log.git
Working copy of https://github.com/apple/swift-log.git resolved at 1.9.1
Creating working copy for https://github.com/modelcontextprotocol/swift-sdk.git
Working copy of https://github.com/modelcontextprotocol/swift-sdk.git resolved at 0.10.2
Creating working copy for https://github.com/swift-server/swift-service-lifecycle.git
Working copy of https://github.com/swift-server/swift-service-lifecycle.git resolved at 2.9.1
Creating working copy for https://github.com/mattt/eventsource.git
Working copy of https://github.com/mattt/eventsource.git resolved at 1.3.0
Creating working copy for https://github.com/apple/swift-async-algorithms.git
Working copy of https://github.com/apple/swift-async-algorithms.git resolved at 1.1.1
Creating working copy for https://github.com/apple/swift-collections.git
Working copy of https://github.com/apple/swift-collections.git resolved at 1.3.0
========================================
ResolveProductDependencies
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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",
"traits": [
"default"
],
"dependencies": [
{
"identity": "apple-docs-mcp",
"name": "Apple-Docs-MCP",
"url": "https://github.com/justindal/Apple-Docs-MCP.git",
"version": "unspecified",
"path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Apple-Docs-MCP",
"traits": [
"default"
],
"dependencies": [
]
}
]
}
Fetching https://github.com/justindal/Apple-Docs-MCP.git
[1/56] Fetching apple-docs-mcp
Fetched https://github.com/justindal/Apple-Docs-MCP.git from cache (0.65s)
Creating working copy for https://github.com/justindal/Apple-Docs-MCP.git
Working copy of https://github.com/justindal/Apple-Docs-MCP.git resolved at main (ec17f7b)
warning: '.resolve-product-dependencies': dependency 'apple-docs-mcp' is not used by any target
Found 0 product dependencies
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Build
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Selected platform: macosSpm
Swift version: 6.3
Building package at path: $PWD
https://github.com/justindal/Apple-Docs-MCP.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun swift build --arch arm64
Building for debugging...
[0/18] Write sources
[10/18] Write Apple-Docs-MCP-entitlement.plist
[10/18] Write sources
[13/18] Compiling CSystem shims.c
[14/18] Write swift-version--6988338F2F200930.txt
[16/75] Compiling SystemPackage FilePathTemp.swift
[17/75] Compiling SystemPackage FilePathComponentView.swift
[18/76] Compiling InternalCollectionsUtilities UnsafeMutableRawBufferPointer+Extras.swift
[19/76] Emitting module InternalCollectionsUtilities
[20/76] Compiling SystemPackage Errno.swift
[21/76] Compiling SystemPackage ErrnoWindows.swift
[22/76] Compiling SystemPackage FilePathComponents.swift
[23/76] Compiling SystemPackage FilePathParsing.swift
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[26/76] Compiling InternalCollectionsUtilities UnsafeMutableBufferPointer+Extras.swift
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[34/148] Compiling DequeModule _DequeSlot.swift
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[37/149] Compiling OrderedCollections OrderedSet+Partial SetAlgebra formIntersection.swift
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[53/155] Compiling OrderedCollections OrderedSet+RandomAccessCollection.swift
[54/155] Compiling OrderedCollections OrderedSet+ReserveCapacity.swift
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[56/155] Compiling OrderedCollections _HashTable.swift
[57/155] Compiling OrderedCollections _Hashtable+Header.swift
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[75/155] Compiling OrderedCollections OrderedDictionary+Deprecations.swift
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[82/155] Compiling OrderedCollections OrderedSet+Partial MutableCollection.swift
[83/155] Compiling OrderedCollections OrderedSet+Partial RangeReplaceableCollection.swift
[84/155] Compiling OrderedCollections OrderedSet+Partial SetAlgebra isStrictSubset.swift
[85/155] Compiling OrderedCollections OrderedSet+Partial SetAlgebra isStrictSuperset.swift
[86/155] Compiling OrderedCollections OrderedSet+Partial SetAlgebra isSubset.swift
[88/155] Compiling OrderedCollections OrderedSet+Partial SetAlgebra isSuperset.swift
[90/155] Compiling OrderedCollections OrderedSet+Partial SetAlgebra subtract.swift
[91/155] Compiling OrderedCollections OrderedSet+Partial SetAlgebra subtracting.swift
[92/155] Emitting module DequeModule
[93/155] Compiling OrderedCollections OrderedDictionary+Partial MutableCollection.swift
[94/155] Compiling OrderedCollections OrderedDictionary+Partial RangeReplaceableCollection.swift
[95/155] Compiling OrderedCollections OrderedDictionary+Sendable.swift
[96/155] Compiling OrderedCollections OrderedDictionary+Sequence.swift
[97/155] Compiling OrderedCollections OrderedDictionary+Values.swift
[98/155] Compiling OrderedCollections OrderedDictionary.swift
[106/155] Compiling OrderedCollections OrderedSet+SubSequence.swift
[107/155] Compiling OrderedCollections OrderedSet+Testing.swift
[108/155] Compiling OrderedCollections OrderedSet+UnorderedView.swift
[109/155] Compiling OrderedCollections OrderedSet+UnstableInternals.swift
[110/155] Compiling OrderedCollections OrderedSet.swift
[111/155] Compiling OrderedCollections _UnsafeBitset.swift
[112/155] Emitting module OrderedCollections
[113/155] Compiling ConcurrencyHelpers LockedValueBox.swift
[114/205] Compiling AsyncAlgorithms AsyncChain3Sequence.swift
[115/205] Compiling AsyncAlgorithms AsyncChunkedByGroupSequence.swift
[116/205] Compiling AsyncAlgorithms AsyncChunkedOnProjectionSequence.swift
[117/208] Compiling AsyncAlgorithms Locking.swift
[118/208] Compiling AsyncAlgorithms AsyncMerge2Sequence.swift
[119/208] Compiling AsyncAlgorithms AsyncMerge3Sequence.swift
[120/208] Compiling AsyncAlgorithms DebounceStorage.swift
[121/208] Compiling AsyncAlgorithms Dictionary.swift
[122/208] Compiling AsyncAlgorithms _TinyArray.swift
[123/208] Compiling Logging MetadataProvider.swift
[124/208] Emitting module ConcurrencyHelpers
[125/208] Compiling ConcurrencyHelpers Lock.swift
[126/211] Compiling AsyncAlgorithms AsyncJoinedSequence.swift
[127/211] Compiling AsyncAlgorithms AsyncRemoveDuplicatesSequence.swift
[128/211] Compiling AsyncAlgorithms AsyncShareSequence.swift
[129/211] Emitting module Logging
[130/211] Compiling Logging Locks.swift
[131/211] Compiling Logging Logging.swift
[132/211] Compiling Logging LogHandler.swift
[133/211] Compiling AsyncAlgorithms AsyncAdjacentPairsSequence.swift
[134/211] Compiling AsyncAlgorithms AsyncBufferedByteIterator.swift
[135/211] Compiling AsyncAlgorithms AsyncChain2Sequence.swift
[136/211] Emitting module SystemPackage
[137/211] Compiling AsyncAlgorithms MergeStateMachine.swift
[138/211] Compiling AsyncAlgorithms MergeStorage.swift
[139/211] Compiling AsyncAlgorithms AsyncThrowingInclusiveReductionsSequence.swift
[140/211] Compiling SystemPackage Util+StringArray.swift
[141/211] Compiling SystemPackage Util.swift
[142/211] Compiling SystemPackage UtilConsumers.swift
[143/211] Compiling AsyncAlgorithms AsyncSyncSequence.swift
[144/211] Compiling AsyncAlgorithms AsyncThrottleSequence.swift
[145/211] Compiling AsyncAlgorithms AsyncThrowingExclusiveReductionsSequence.swift
[146/211] Compiling AsyncAlgorithms AsyncTimerSequence.swift
[147/211] Compiling AsyncAlgorithms AsyncBufferSequence.swift
[148/211] Compiling AsyncAlgorithms BoundedBufferStateMachine.swift
[149/211] Compiling AsyncAlgorithms BoundedBufferStorage.swift
[150/211] Compiling AsyncAlgorithms UnboundedBufferStateMachine.swift
[151/211] Compiling AsyncAlgorithms DebounceStateMachine.swift
[152/211] Compiling AsyncAlgorithms AsyncChunksOfCountOrSignalSequence.swift
[153/211] Compiling AsyncAlgorithms AsyncChunksOfCountSequence.swift
[154/211] Compiling AsyncAlgorithms AsyncCompactedSequence.swift
[155/211] Compiling AsyncAlgorithms AsyncExclusiveReductionsSequence.swift
[156/211] Compiling AsyncAlgorithms AsyncInclusiveReductionsSequence.swift
[157/211] Compiling AsyncAlgorithms AsyncJoinedBySeparatorSequence.swift
[158/216] Emitting module UnixSignals
[159/216] Compiling UnixSignals UnixSignal.swift
[160/216] Compiling UnixSignals UnixSignalsSequence.swift
[178/216] Compiling AsyncAlgorithms AsyncCombineLatest2Sequence.swift
[179/216] Compiling AsyncAlgorithms AsyncCombineLatest3Sequence.swift
[180/216] Compiling AsyncAlgorithms CombineLatestStateMachine.swift
[181/216] Compiling AsyncAlgorithms CombineLatestStorage.swift
[182/216] Compiling AsyncAlgorithms AsyncDebounceSequence.swift
[183/216] Emitting module AsyncAlgorithms
[192/216] Compiling AsyncAlgorithms AsyncThrowingChannel.swift
[193/216] Compiling AsyncAlgorithms ChannelStateMachine.swift
[194/216] Compiling AsyncAlgorithms ChannelStorage.swift
[200/216] Compiling AsyncAlgorithms MultiProducerSingleConsumerAsyncChannel+Internal.swift
[201/216] Compiling AsyncAlgorithms MultiProducerSingleConsumerAsyncChannel.swift
[202/216] Compiling AsyncAlgorithms RangeReplaceableCollection.swift
[203/216] Compiling AsyncAlgorithms Rethrow.swift
[204/216] Compiling AsyncAlgorithms SetAlgebra.swift
[205/216] Compiling AsyncAlgorithms UnsafeTransfer.swift
[206/216] Compiling AsyncAlgorithms AsyncZip2Sequence.swift
[207/216] Compiling AsyncAlgorithms AsyncZip3Sequence.swift
[208/216] Compiling AsyncAlgorithms ZipStateMachine.swift
[209/216] Compiling AsyncAlgorithms ZipStorage.swift
[210/225] Compiling ServiceLifecycle ServiceRunnerError.swift
[211/225] Compiling ServiceLifecycle AsyncCancelOnGracefulShutdownSequence.swift
[212/225] Compiling ServiceLifecycle ServiceGroupConfiguration.swift
[213/225] Emitting module ServiceLifecycle
[214/225] Compiling ServiceLifecycle Service.swift
[215/225] Compiling ServiceLifecycle AsyncGracefulShutdownSequence.swift
[216/225] Compiling ServiceLifecycle GracefulShutdown.swift
[217/225] Compiling ServiceLifecycle CancellationWaiter.swift
[218/225] Compiling ServiceLifecycle ServiceGroup.swift
[219/225] Compiling EventSource EventSource.swift
[220/225] Compiling EventSource AsyncEventsSequence.swift
[221/225] Compiling EventSource AsyncSequence+Events.swift
[222/225] Emitting module EventSource
[223/244] Emitting module MCP
[224/244] Compiling MCP Error.swift
[225/244] Compiling MCP ID.swift
[226/246] Compiling MCP Lifecycle.swift
[227/246] Compiling MCP Messages.swift
[228/246] Compiling MCP Transport.swift
[229/246] Compiling MCP HTTPClientTransport.swift
[230/246] Compiling MCP Prompts.swift
[231/246] Compiling MCP Resources.swift
[232/246] Compiling MCP Ping.swift
[233/246] Compiling MCP Value.swift
[234/246] Compiling MCP Versioning.swift
[235/246] Compiling MCP Client.swift
[236/246] Compiling MCP Sampling.swift
[237/246] Compiling MCP Data+Extensions.swift
[238/246] Compiling MCP StdioTransport.swift
[239/246] Compiling MCP UnitInterval.swift
[240/246] Compiling MCP InMemoryTransport.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-sdk/Sources/MCP/Base/Transports/NetworkTransport.swift:581:33: error: sending 'sendContinuationResumed' risks causing data races [#SendingRisksDataRace]
579 |
580 | Task { @MainActor in
581 | if !sendContinuationResumed {
| |- error: sending 'sendContinuationResumed' risks causing data races [#SendingRisksDataRace]
| `- note: task-isolated 'sendContinuationResumed' is captured by a main actor-isolated closure. main actor-isolated uses in closure may race against later nonisolated uses
582 | sendContinuationResumed = true
583 | if let error = error {
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-sdk/Sources/MCP/Base/Transports/NetworkTransport.swift:812:29: error: sending 'receiveContinuationResumed' risks causing data races [#SendingRisksDataRace]
810 | content, _, isComplete, error in
811 | Task { @MainActor in
812 | if !receiveContinuationResumed {
| |- error: sending 'receiveContinuationResumed' risks causing data races [#SendingRisksDataRace]
| `- note: task-isolated 'receiveContinuationResumed' is captured by a main actor-isolated closure. main actor-isolated uses in closure may race against later nonisolated uses
813 | receiveContinuationResumed = true
814 | if let error = error {
[#SendingRisksDataRace]: <https://docs.swift.org/compiler/documentation/diagnostics/sending-risks-data-race>
[241/246] Compiling MCP NetworkTransport.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-sdk/Sources/MCP/Base/Transports/NetworkTransport.swift:581:33: error: sending 'sendContinuationResumed' risks causing data races [#SendingRisksDataRace]
579 |
580 | Task { @MainActor in
581 | if !sendContinuationResumed {
| |- error: sending 'sendContinuationResumed' risks causing data races [#SendingRisksDataRace]
| `- note: task-isolated 'sendContinuationResumed' is captured by a main actor-isolated closure. main actor-isolated uses in closure may race against later nonisolated uses
582 | sendContinuationResumed = true
583 | if let error = error {
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-sdk/Sources/MCP/Base/Transports/NetworkTransport.swift:812:29: error: sending 'receiveContinuationResumed' risks causing data races [#SendingRisksDataRace]
810 | content, _, isComplete, error in
811 | Task { @MainActor in
812 | if !receiveContinuationResumed {
| |- error: sending 'receiveContinuationResumed' risks causing data races [#SendingRisksDataRace]
| `- note: task-isolated 'receiveContinuationResumed' is captured by a main actor-isolated closure. main actor-isolated uses in closure may race against later nonisolated uses
813 | receiveContinuationResumed = true
814 | if let error = error {
[#SendingRisksDataRace]: <https://docs.swift.org/compiler/documentation/diagnostics/sending-risks-data-race>
[242/246] Compiling MCP Server.swift
[243/246] Compiling MCP Tools.swift
BUILD FAILURE 6.3 macosSpm