Swift Package IndexBuild Information
Failed to build swift-snapshot-testing, reference main (b71a65), with Swift 6.3 for macOS (SPM) on 18 Apr 2026 15:46:47 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
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Clone URL: https://github.com/snapshot-testing/swift-snapshot-testing.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/snapshot-testing/swift-snapshot-testing
* branch main -> FETCH_HEAD
* [new branch] main -> origin/main
HEAD is now at b71a657 Fix Linux Builds (#4)
Cloned https://github.com/snapshot-testing/swift-snapshot-testing.git
Revision (git rev-parse @):
b71a65781992ae8238c9d2e4f5965d5b0d634510
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/snapshot-testing/swift-snapshot-testing.git at main
Fetching https://github.com/pointfreeco/xctest-dynamic-overlay
Fetching https://github.com/o-nnerb/swift-async-stream
Fetching https://github.com/snapshot-testing/xc-snapshot-testing
Fetching https://github.com/swiftlang/swift-syntax
Fetching https://github.com/pointfreeco/swift-custom-dump
[1/272] Fetching swift-async-stream
[167/1103] Fetching swift-async-stream, xc-snapshot-testing
[398/6567] Fetching swift-async-stream, xc-snapshot-testing, swift-custom-dump
[595/12290] Fetching swift-async-stream, xc-snapshot-testing, swift-custom-dump, xctest-dynamic-overlay
[9512/87273] Fetching swift-async-stream, xc-snapshot-testing, swift-custom-dump, xctest-dynamic-overlay, swift-syntax
Fetched https://github.com/pointfreeco/swift-custom-dump from cache (1.38s)
Fetched https://github.com/snapshot-testing/xc-snapshot-testing from cache (1.38s)
[7495/80978] Fetching swift-async-stream, xctest-dynamic-overlay, swift-syntax
Fetched https://github.com/swiftlang/swift-syntax from cache (12.57s)
Fetched https://github.com/pointfreeco/xctest-dynamic-overlay from cache (12.57s)
Fetched https://github.com/o-nnerb/swift-async-stream from cache (12.57s)
Creating working copy for https://github.com/o-nnerb/swift-async-stream
Creating working copy for https://github.com/snapshot-testing/xc-snapshot-testing
Creating working copy for https://github.com/swiftlang/swift-syntax
Creating working copy for https://github.com/pointfreeco/xctest-dynamic-overlay
Creating working copy for https://github.com/pointfreeco/swift-custom-dump
Working copy of https://github.com/o-nnerb/swift-async-stream resolved at 1.3.2
Working copy of https://github.com/pointfreeco/swift-custom-dump resolved at 1.4.1
Working copy of https://github.com/pointfreeco/xctest-dynamic-overlay resolved at 1.6.1
Working copy of https://github.com/snapshot-testing/xc-snapshot-testing resolved at 1.2.0
Working copy of https://github.com/swiftlang/swift-syntax resolved at 601.0.1
========================================
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": "swift-snapshot-testing",
"name": "swift-snapshot-testing",
"url": "https://github.com/snapshot-testing/swift-snapshot-testing.git",
"version": "unspecified",
"path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-snapshot-testing",
"traits": [
"default"
],
"dependencies": [
{
"identity": "xc-snapshot-testing",
"name": "xc-snapshot-testing",
"url": "https://github.com/snapshot-testing/xc-snapshot-testing",
"version": "1.2.0",
"path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/xc-snapshot-testing",
"traits": [
"default"
],
"dependencies": [
{
"identity": "swift-async-stream",
"name": "SwiftAsyncStream",
"url": "https://github.com/o-nnerb/swift-async-stream",
"version": "1.3.3",
"path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-async-stream",
"traits": [
"default"
],
"dependencies": [
]
},
{
"identity": "swift-custom-dump",
"name": "swift-custom-dump",
"url": "https://github.com/pointfreeco/swift-custom-dump",
"version": "1.5.0",
"path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-custom-dump",
"traits": [
"default"
],
"dependencies": [
{
"identity": "xctest-dynamic-overlay",
"name": "xctest-dynamic-overlay",
"url": "https://github.com/pointfreeco/xctest-dynamic-overlay",
"version": "1.9.0",
"path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/xctest-dynamic-overlay",
"traits": [
"default"
],
"dependencies": [
]
}
]
}
]
},
{
"identity": "swift-syntax",
"name": "swift-syntax",
"url": "https://github.com/swiftlang/swift-syntax",
"version": "602.0.0",
"path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-syntax",
"traits": [
"default"
],
"dependencies": [
]
}
]
}
]
}
Fetching https://github.com/snapshot-testing/swift-snapshot-testing.git
[1/168] Fetching swift-snapshot-testing
Fetched https://github.com/snapshot-testing/swift-snapshot-testing.git from cache (0.79s)
Fetching https://github.com/swiftlang/swift-syntax from cache
Fetching https://github.com/snapshot-testing/xc-snapshot-testing from cache
Fetched https://github.com/swiftlang/swift-syntax from cache (0.82s)
Fetched https://github.com/snapshot-testing/xc-snapshot-testing from cache (0.82s)
Computing version for https://github.com/snapshot-testing/xc-snapshot-testing
Computed https://github.com/snapshot-testing/xc-snapshot-testing at 1.2.0 (1.41s)
Fetching https://github.com/pointfreeco/swift-custom-dump from cache
Fetching https://github.com/o-nnerb/swift-async-stream from cache
Fetched https://github.com/o-nnerb/swift-async-stream from cache (0.46s)
Fetched https://github.com/pointfreeco/swift-custom-dump from cache (0.47s)
Computing version for https://github.com/pointfreeco/swift-custom-dump
Computed https://github.com/pointfreeco/swift-custom-dump at 1.5.0 (1.06s)
Fetching https://github.com/pointfreeco/xctest-dynamic-overlay from cache
Fetched https://github.com/pointfreeco/xctest-dynamic-overlay from cache (0.45s)
Computing version for https://github.com/o-nnerb/swift-async-stream
Computed https://github.com/o-nnerb/swift-async-stream at 1.3.3 (1.03s)
Computing version for https://github.com/swiftlang/swift-syntax
Computed https://github.com/swiftlang/swift-syntax at 602.0.0 (0.78s)
Computing version for https://github.com/pointfreeco/xctest-dynamic-overlay
Computed https://github.com/pointfreeco/xctest-dynamic-overlay at 1.9.0 (0.58s)
Creating working copy for https://github.com/pointfreeco/xctest-dynamic-overlay
Working copy of https://github.com/pointfreeco/xctest-dynamic-overlay resolved at 1.9.0
Creating working copy for https://github.com/snapshot-testing/swift-snapshot-testing.git
Working copy of https://github.com/snapshot-testing/swift-snapshot-testing.git resolved at main (b71a657)
Creating working copy for https://github.com/pointfreeco/swift-custom-dump
Working copy of https://github.com/pointfreeco/swift-custom-dump resolved at 1.5.0
Creating working copy for https://github.com/o-nnerb/swift-async-stream
Working copy of https://github.com/o-nnerb/swift-async-stream resolved at 1.3.3
Creating working copy for https://github.com/swiftlang/swift-syntax
Working copy of https://github.com/swiftlang/swift-syntax resolved at 602.0.0
Creating working copy for https://github.com/snapshot-testing/xc-snapshot-testing
Working copy of https://github.com/snapshot-testing/xc-snapshot-testing resolved at 1.2.0
Downloading package prebuilt https://download.swift.org/prebuilts/swift-syntax/602.0.0/swiftlang-6.3.0.123.5-macosx26.4-MacroSupport.zip
Downloaded https://download.swift.org/prebuilts/swift-syntax/602.0.0/swiftlang-6.3.0.123.5-macosx26.4-MacroSupport.zip (0.30s)
warning: '.resolve-product-dependencies': dependency 'swift-snapshot-testing' is not used by any target
Found 2 product dependencies
- xc-snapshot-testing
- swift-syntax
========================================
Build
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Selected platform: macosSpm
Swift version: 6.3
Building package at path: $PWD
https://github.com/snapshot-testing/swift-snapshot-testing.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun swift build --arch arm64
Building for debugging...
[0/21] Write sources
[19/21] Compiling _SwiftSyntaxCShims dummy.c
[20/21] Write swift-version--6988338F2F200930.txt
[22/42] Compiling SwiftSyntax601 Empty.swift
[23/42] Emitting module SwiftSyntax601
[24/42] Compiling SwiftSyntax510 Empty.swift
[25/42] Emitting module SwiftSyntax510
[26/42] Emitting module SwiftSyntax509
[27/42] Compiling SwiftSyntax600 Empty.swift
[28/42] Compiling SwiftSyntax509 Empty.swift
[29/42] Emitting module SwiftSyntax600
[30/42] Emitting module IssueReportingPackageSupport
[31/42] Compiling IssueReportingPackageSupport _Test.swift
[32/127] Compiling SwiftSyntax AbsolutePosition.swift
[33/127] Compiling SwiftSyntax AbsoluteRawSyntax.swift
[34/127] Compiling SwiftSyntax AbsoluteSyntaxInfo.swift
[35/127] Compiling SwiftSyntax Assert.swift
[36/127] Compiling SwiftSyntax BumpPtrAllocator.swift
[37/127] Compiling SwiftSyntax CommonAncestor.swift
[38/127] Compiling SwiftSyntax Convenience.swift
[39/127] Compiling SwiftSyntax CustomTraits.swift
[40/134] Compiling SwiftSyntax EditorPlaceholder.swift
[41/134] Compiling SwiftSyntax Identifier.swift
[42/134] Compiling SwiftSyntax MemoryLayout.swift
[43/134] Compiling SwiftSyntax MissingNodeInitializers.swift
[44/134] Compiling SwiftSyntax RawSyntax.swift
[45/134] Compiling SwiftSyntax RawSyntaxLayoutView.swift
[46/134] Compiling SwiftSyntax RawSyntaxNodeProtocol.swift
[47/134] Compiling SwiftSyntax RawSyntaxTokenView.swift
[48/134] Compiling SwiftSyntax SourceEdit.swift
[49/134] Compiling SwiftSyntax SourceLength.swift
[50/136] Compiling IssueReporting WithExpectedIssue.swift
[51/136] Compiling IssueReporting WithIssueContext.swift
[58/136] Emitting module IssueReporting
[61/136] Compiling SwiftAsyncStream ValueSubject.swift
[62/136] Compiling SwiftAsyncStream AnyAsyncSequence.swift
[63/136] Compiling SwiftAsyncStream SubjectAsyncIterator.swift
[64/136] Compiling SwiftAsyncStream PassthroughSubject.swift
[65/136] Compiling SwiftAsyncStream NodeSubject.swift
[66/136] Emitting module SwiftAsyncStream
[75/137] Compiling SwiftAsyncStream AsyncSignal.swift
[76/137] Compiling SwiftAsyncStream Lock.swift
[77/137] Compiling SwiftAsyncStream InlineProperty.swift
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-async-stream/Sources/SwiftAsyncStream/Async/AsyncLock.swift:123:22: error: passing closure as a 'sending' parameter risks causing data races between code in the current task and concurrent execution of the closure [#SendingClosureRisksDataRace]
121 | #endif
122 |
123 | Task.detached {
| `- error: passing closure as a 'sending' parameter risks causing data races between code in the current task and concurrent execution of the closure [#SendingClosureRisksDataRace]
124 | guard let self else {
| `- note: closure captures reference to mutable var 'self' which is accessible to code in the current task
125 | return
126 | }
[#SendingClosureRisksDataRace]: <https://docs.swift.org/compiler/documentation/diagnostics/sending-closure-risks-data-race>
/Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-async-stream/Sources/SwiftAsyncStream/Async/AsyncLock.swift:123:22: error: passing closure as a 'sending' parameter risks causing data races between code in the current task and concurrent execution of the closure [#SendingClosureRisksDataRace]
121 | #endif
122 |
123 | Task.detached {
| `- error: passing closure as a 'sending' parameter risks causing data races between code in the current task and concurrent execution of the closure [#SendingClosureRisksDataRace]
124 | guard let self else {
| `- note: closure captures reference to mutable var 'self' which is accessible to code in the current task
125 | return
126 | }
[#SendingClosureRisksDataRace]: <https://docs.swift.org/compiler/documentation/diagnostics/sending-closure-risks-data-race>
[80/140] Compiling SwiftAsyncStream Task+.swift
[81/140] Compiling SwiftSyntax SyntaxProtocol.swift
[82/140] Compiling SwiftSyntax SyntaxText.swift
[83/140] Compiling SwiftSyntax SyntaxTreeViewMode.swift
[84/140] Compiling SwiftSyntax TokenDiagnostic.swift
[85/140] Compiling SwiftSyntax TokenSequence.swift
[86/140] Compiling SwiftSyntax TokenSyntax.swift
[87/140] Compiling SwiftSyntax Trivia.swift
BUILD FAILURE 6.3 macosSpm