Swift Package Index

Build Information

Failed to build swift-snapshot-testing, reference 1.17.5 (7b0bbb), with Swift 6.4 for macOS (SPM) on 16 Sep 2026 01:50:53 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
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Builder version: 5.1.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/tdrhq/swift-snapshot-testing.git
Reference: 1.17.5
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/tdrhq/swift-snapshot-testing
 * tag               1.17.5     -> FETCH_HEAD
HEAD is now at 7b0bbba Add an NB to @_implementationOnly import.
Cloned https://github.com/tdrhq/swift-snapshot-testing.git
Revision (git rev-parse @):
7b0bbbae90c41f848f90ac7b4df6c4f50068256d
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/tdrhq/swift-snapshot-testing.git at 1.17.5
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/tdrhq/swift-snapshot-testing.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64
Building for debugging...
[Computing dependencies]
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Fetching https://github.com/swiftlang/swift-syntax
[1/79910] Fetching swift-syntax
Fetched https://github.com/swiftlang/swift-syntax (6.72s)
Computing version for https://github.com/swiftlang/swift-syntax
Computed https://github.com/swiftlang/swift-syntax at 600.0.1 (7.53s)
Creating working copy for https://github.com/swiftlang/swift-syntax
Working copy of https://github.com/swiftlang/swift-syntax resolved at 600.0.1
warning: 'spi-builder-workspace': found 1 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
    /Users/admin/builder/spi-builder-workspace/Tests/InlineSnapshotTestingTests/InlineSnapshotTesting.xctestplan
error: SwiftCompile normal arm64 failed with a nonzero exit code. Command line:     cd /Users/admin/builder

/Users/admin/builder/spi-builder-workspace/Sources/SnapshotTesting/AssertSnapshot.swift:6:24: warning: safely use '@_implementationOnly' without library evolution by setting '-enable-experimental-feature CheckImplementationOnly' for 'SnapshotTesting' [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/implementation-only-deprecated\ImplementationOnlyDeprecated]8;;\]
  4 |   // NB: We are importing only the implementation of Testing because that framework is not available
  5 |   //     in Xcode UI test targets.
  6 |   @_implementationOnly import Testing
    |                        `- warning: safely use '@_implementationOnly' without library evolution by setting '-enable-experimental-feature CheckImplementationOnly' for 'SnapshotTesting' [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/implementation-only-deprecated\ImplementationOnlyDeprecated]8;;\]
  7 | #endif
  8 |
/Users/admin/builder/spi-builder-workspace/Sources/SnapshotTesting/Internal/RecordIssue.swift:6:24: warning: safely use '@_implementationOnly' without library evolution by setting '-enable-experimental-feature CheckImplementationOnly' for 'SnapshotTesting' [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/implementation-only-deprecated\ImplementationOnlyDeprecated]8;;\]
 4 |   // NB: We are importing only the implementation of Testing because that framework is not available
 5 |   //     in Xcode UI test targets.
 6 |   @_implementationOnly import Testing
   |                        `- warning: safely use '@_implementationOnly' without library evolution by setting '-enable-experimental-feature CheckImplementationOnly' for 'SnapshotTesting' [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/implementation-only-deprecated\ImplementationOnlyDeprecated]8;;\]
 7 | #endif
 8 |
/Users/admin/builder/spi-builder-workspace/Sources/SnapshotTesting/SnapshotsTestTrait.swift:4:24: warning: safely use '@_implementationOnly' without library evolution by setting '-enable-experimental-feature CheckImplementationOnly' for 'SnapshotTesting' [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/implementation-only-deprecated\ImplementationOnlyDeprecated]8;;\]
 2 |   // NB: We are importing only the implementation of Testing because that framework is not available
 3 |   //     in Xcode UI test targets.
 4 |   @_implementationOnly import Testing
   |                        `- warning: safely use '@_implementationOnly' without library evolution by setting '-enable-experimental-feature CheckImplementationOnly' for 'SnapshotTesting' [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/implementation-only-deprecated\ImplementationOnlyDeprecated]8;;\]
 5 |
 6 |   @_spi(Experimental)
/Users/admin/builder/spi-builder-workspace/Sources/SnapshotTesting/SnapshotsTestTrait.swift:7:13: warning: cannot use protocol 'Trait' in an extension with public or '@usableFromInline' members; 'Testing' has been imported as implementation-only
 5 |
 6 |   @_spi(Experimental)
 7 |   extension Trait where Self == _SnapshotsTestTrait {
   |             `- warning: cannot use protocol 'Trait' in an extension with public or '@usableFromInline' members; 'Testing' has been imported as implementation-only
 8 |     /// Configure snapshot testing in a suite or test.
 9 |     ///
Testing.Trait:1:17: note: protocol declared here
1 | public protocol Trait : Sendable {
  |                 `- note: protocol declared here
2 |     func prepare(for test: Test) async throws
3 |     var comments: [Comment] { get }
/Users/admin/builder/spi-builder-workspace/Sources/SnapshotTesting/SnapshotsTestTrait.swift:37:38: warning: cannot use protocol 'SuiteTrait' in a public or '@usableFromInline' conformance; 'Testing' has been imported as implementation-only
35 |   /// A type representing the configuration of snapshot testing.
36 |   @_spi(Experimental)
37 |   public struct _SnapshotsTestTrait: SuiteTrait, TestTrait {
   |                                      `- warning: cannot use protocol 'SuiteTrait' in a public or '@usableFromInline' conformance; 'Testing' has been imported as implementation-only
38 |     public let isRecursive = true
39 |     let configuration: SnapshotTestingConfiguration
Testing.SuiteTrait:1:17: note: protocol declared here
1 | public protocol SuiteTrait : Trait {
  |                 `- note: protocol declared here
2 |     var isRecursive: Bool { get }
3 | }
/Users/admin/builder/spi-builder-workspace/Sources/SnapshotTesting/SnapshotsTestTrait.swift:37:50: warning: cannot use protocol 'TestTrait' in a public or '@usableFromInline' conformance; 'Testing' has been imported as implementation-only
35 |   /// A type representing the configuration of snapshot testing.
36 |   @_spi(Experimental)
37 |   public struct _SnapshotsTestTrait: SuiteTrait, TestTrait {
   |                                                  `- warning: cannot use protocol 'TestTrait' in a public or '@usableFromInline' conformance; 'Testing' has been imported as implementation-only
38 |     public let isRecursive = true
39 |     let configuration: SnapshotTestingConfiguration
Testing.TestTrait:1:17: note: protocol declared here
1 | public protocol TestTrait : Trait {
  |                 `- note: protocol declared here
2 | }
/Users/admin/builder/spi-builder-workspace/Sources/SnapshotTesting/SnapshotsTestTrait.swift:37:17: error: cannot use conformance of 'Never' to 'TestScoping' here; 'Testing' has been imported as implementation-only
35 |   /// A type representing the configuration of snapshot testing.
36 |   @_spi(Experimental)
37 |   public struct _SnapshotsTestTrait: SuiteTrait, TestTrait {
   |                 |- error: cannot use conformance of 'Never' to 'TestScoping' here; 'Testing' has been imported as implementation-only
   |                 `- note: in associated type 'Self.TestScopeProvider' (inferred as 'Never')
38 |     public let isRecursive = true
39 |     let configuration: SnapshotTestingConfiguration
[#ImplementationOnlyDeprecated]: <https://docs.swift.org/compiler/documentation/diagnostics/implementation-only-deprecated>
Failed frontend command:
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/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/swift-snapshot-testing.build/Debug/SnapshotTesting-t.build/Objects-normal/arm64/SnapshotTesting.abi.json
error: Build failed
BUILD FAILURE 6.4 macosSpm