Swift Package Index

Build Information

Successful build of swift-differentiation-stdlib, reference 605.0.0-prerelease-1 (3af76b), with Swift 6.4 for macOS (SPM) on 28 Sep 2026 19:53:58 UTC.

Swift 6 data race errors: 0

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/differentiable-swift/swift-differentiation-stdlib.git
Reference: 605.0.0-prerelease-1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/differentiable-swift/swift-differentiation-stdlib
 * tag               605.0.0-prerelease-1 -> FETCH_HEAD
HEAD is now at 3af76b9 release: 605.0.0-prerelease-1 (swift-DEVELOPMENT-SNAPSHOT-2026-09-21-a)
Cloned https://github.com/differentiable-swift/swift-differentiation-stdlib.git
Revision (git rev-parse @):
3af76b9a110bf78ca45d2cfb52e58014e2e73949
SUCCESS checkout https://github.com/differentiable-swift/swift-differentiation-stdlib.git at 605.0.0-prerelease-1
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/differentiable-swift/swift-differentiation-stdlib.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64
Building for debugging...
[Planning deferred tasks]
Build complete! (0.35 sec)
Downloading binary artifact https://github.com/differentiable-swift/swift-differentiation-stdlib/releases/download/605.0.0-prerelease-1/_Differentiation-swift-DEVELOPMENT-SNAPSHOT-2026-09-21-a.xcframework.zip
[1/100] Downloading https://github.com/differentiable-swift/swift-differentiation-stdlib/releases/download/605.0.0-prerelease-1/_Differentiation-swift-DEVELOPMENT-SNAPSHOT-2026-09-21-a.xcframework.zip (12 KB / 1 MB)
[31/100] Downloading https://github.com/differentiable-swift/swift-differentiation-stdlib/releases/download/605.0.0-prerelease-1/_Differentiation-swift-DEVELOPMENT-SNAPSHOT-2026-09-21-a.xcframework.zip (324 KB / 1 MB)
[57/100] Downloading https://github.com/differentiable-swift/swift-differentiation-stdlib/releases/download/605.0.0-prerelease-1/_Differentiation-swift-DEVELOPMENT-SNAPSHOT-2026-09-21-a.xcframework.zip (600 KB / 1 MB)
[84/100] Downloading https://github.com/differentiable-swift/swift-differentiation-stdlib/releases/download/605.0.0-prerelease-1/_Differentiation-swift-DEVELOPMENT-SNAPSHOT-2026-09-21-a.xcframework.zip (879 KB / 1 MB)
[100/100] Downloading https://github.com/differentiable-swift/swift-differentiation-stdlib/releases/download/605.0.0-prerelease-1/_Differentiation-swift-DEVELOPMENT-SNAPSHOT-2026-09-21-a.xcframework.zip (1 MB / 1 MB)
Downloaded https://github.com/differentiable-swift/swift-differentiation-stdlib/releases/download/605.0.0-prerelease-1/_Differentiation-swift-DEVELOPMENT-SNAPSHOT-2026-09-21-a.xcframework.zip (0.66s)
Build complete.
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  "manifest_display_name" : "swift-differentiation-stdlib",
  "name" : "swift-differentiation-stdlib",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
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  "targets" : [
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    {
      "c99name" : "DifferentiationTests",
      "module_type" : "SwiftTarget",
      "name" : "DifferentiationTests",
      "path" : "Tests/DifferentiationTests",
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      "target_dependencies" : [
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      "type" : "test"
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  "tools_version" : "6.2"
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Done.