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Build Information

Failed to build Hylo, reference main (b86ff7), with Swift 6.4 for macOS (Xcode) using Xcode 27.0 on 26 Sep 2026 06:32:57 UTC.

Build Command

No build command. This typically means the build failed at an early stage where we determine the build command.

Build Log

========================================
RunAll
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Builder version: 5.1.0
Interrupt handler set up.
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Checkout
========================================
Clone URL: https://github.com/hylo-lang/hylo.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/hylo-lang/hylo
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at b86ff70 Bump devcontainers/ci from 0.3.1900000449 to 0.3.1900000450
Submodule path 'SPMBuildToolSupport': checked out 'c270d23a9c70aa015e09a9c0ea28e36d2801adc4'
Submodule 'SPMBuildToolSupport' (https://github.com/dabrahams/SPMBuildToolSupport.git) registered for path 'SPMBuildToolSupport'
Cloning into '/Users/admin/builder/spi-builder-workspace/SPMBuildToolSupport'...
Cloned https://github.com/hylo-lang/hylo.git
Revision (git rev-parse @):
b86ff706a3a81ef6ae52e15d912988a6c6d5fe1b
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/hylo-lang/hylo.git at main
========================================
Build
========================================
Selected platform:         macosXcodebuild
Swift version:             6.4
Building package at path:  $PWD
https://github.com/hylo-lang/hylo.git
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Fetching from https://github.com/hylo-lang/Durian.git
Fetching from https://github.com/hylo-lang/Swifty-LLVM
Invalid manifest (compiled with: ["/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc", "-vfsoverlay", "/var/folders/xq/y_g06wb113726d38xsyx71_h0000gn/T/TemporaryDirectory.NEP8I6/vfs.yaml", "-L", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/SharedFrameworks/SwiftPM.framework/SharedSupport/ManifestAPI", "-lPackageDescription", "-Xlinker", "-rpath", "-Xlinker", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/SharedFrameworks/SwiftPM.framework/SharedSupport/ManifestAPI", "-target", "arm64-apple-macos14.0", "-plugin-path", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing", "-sdk", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk", "-swift-version", "6", "-I", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/SharedFrameworks/SwiftPM.framework/SharedSupport/ManifestAPI", "-sdk", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk", "-package-description-version", "6.2.0", "-Xfrontend", "-serialize-diagnostics-path", "-Xfrontend", "/Users/admin/Library/Caches/org.swift.swiftpm/manifests/ManifestLoading/swifty-llvm.dia", "/Package.swift", "-o", "/var/folders/xq/y_g06wb113726d38xsyx71_h0000gn/T/TemporaryDirectory.V8Msa0/swifty-llvm-manifest"])
main/Package.swift:152: Fatal error: Unexpectedly found nil while unwrapping an Optional value in https://github.com/hylo-lang/Swifty-LLVMResolve Package Graph
Updating from https://github.com/hylo-lang/Durian.git
Updating from https://github.com/hylo-lang/Swifty-LLVM
Invalid manifest (compiled with: ["/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc", "-vfsoverlay", "/var/folders/xq/y_g06wb113726d38xsyx71_h0000gn/T/TemporaryDirectory.vh4jCr/vfs.yaml", "-L", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/SharedFrameworks/SwiftPM.framework/SharedSupport/ManifestAPI", "-lPackageDescription", "-Xlinker", "-rpath", "-Xlinker", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/SharedFrameworks/SwiftPM.framework/SharedSupport/ManifestAPI", "-target", "arm64-apple-macos14.0", "-plugin-path", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing", "-sdk", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk", "-swift-version", "6", "-I", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/SharedFrameworks/SwiftPM.framework/SharedSupport/ManifestAPI", "-sdk", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk", "-package-description-version", "6.2.0", "-Xfrontend", "-serialize-diagnostics-path", "-Xfrontend", "/Users/admin/Library/Caches/org.swift.swiftpm/manifests/ManifestLoading/swifty-llvm.dia", "/Package.swift", "-o", "/var/folders/xq/y_g06wb113726d38xsyx71_h0000gn/T/TemporaryDirectory.kkfmdI/swifty-llvm-manifest"])
main/Package.swift:152: Fatal error: Unexpectedly found nil while unwrapping an Optional value in https://github.com/hylo-lang/Swifty-LLVMResolve Package Graph
Updating from https://github.com/hylo-lang/Durian.git
Updating from https://github.com/hylo-lang/Swifty-LLVM
Invalid manifest (compiled with: ["/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc", "-vfsoverlay", "/var/folders/xq/y_g06wb113726d38xsyx71_h0000gn/T/TemporaryDirectory.7BD3PI/vfs.yaml", "-L", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/SharedFrameworks/SwiftPM.framework/SharedSupport/ManifestAPI", "-lPackageDescription", "-Xlinker", "-rpath", "-Xlinker", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/SharedFrameworks/SwiftPM.framework/SharedSupport/ManifestAPI", "-target", "arm64-apple-macos14.0", "-plugin-path", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing", "-sdk", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk", "-swift-version", "6", "-I", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/SharedFrameworks/SwiftPM.framework/SharedSupport/ManifestAPI", "-sdk", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk", "-package-description-version", "6.2.0", "-Xfrontend", "-serialize-diagnostics-path", "-Xfrontend", "/Users/admin/Library/Caches/org.swift.swiftpm/manifests/ManifestLoading/swifty-llvm.dia", "/Package.swift", "-o", "/var/folders/xq/y_g06wb113726d38xsyx71_h0000gn/T/TemporaryDirectory.GUJyDN/swifty-llvm-manifest"])
main/Package.swift:152: Fatal error: Unexpectedly found nil while unwrapping an Optional value in https://github.com/hylo-lang/Swifty-LLVM
Resolved source packages:
  spi-builder-workspace: (null)
2026-09-26 02:32:53.871 xcodebuild[539:3053] Writing error result bundle to /var/folders/xq/y_g06wb113726d38xsyx71_h0000gn/T/ResultBundle_2026-26-09_02-32-0053.xcresult
xcodebuild: error: Could not resolve package dependencies:
  Invalid manifest (compiled with: ["/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc", "-vfsoverlay", "/var/folders/xq/y_g06wb113726d38xsyx71_h0000gn/T/TemporaryDirectory.7BD3PI/vfs.yaml", "-L", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/SharedFrameworks/SwiftPM.framework/SharedSupport/ManifestAPI", "-lPackageDescription", "-Xlinker", "-rpath", "-Xlinker", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/SharedFrameworks/SwiftPM.framework/SharedSupport/ManifestAPI", "-target", "arm64-apple-macos14.0", "-plugin-path", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing", "-sdk", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk", "-swift-version", "6", "-I", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/SharedFrameworks/SwiftPM.framework/SharedSupport/ManifestAPI", "-sdk", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk", "-package-description-version", "6.2.0", "-Xfrontend", "-serialize-diagnostics-path", "-Xfrontend", "/Users/admin/Library/Caches/org.swift.swiftpm/manifests/ManifestLoading/swifty-llvm.dia", "/Package.swift", "-o", "/var/folders/xq/y_g06wb113726d38xsyx71_h0000gn/T/TemporaryDirectory.GUJyDN/swifty-llvm-manifest"])
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Updating from https://github.com/hylo-lang/Durian.git
Updating from https://github.com/hylo-lang/Swifty-LLVM
Invalid manifest (compiled with: ["/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc", "-vfsoverlay", "/var/folders/xq/y_g06wb113726d38xsyx71_h0000gn/T/TemporaryDirectory.u1LsfT/vfs.yaml", "-L", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/SharedFrameworks/SwiftPM.framework/SharedSupport/ManifestAPI", "-lPackageDescription", "-Xlinker", "-rpath", "-Xlinker", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/SharedFrameworks/SwiftPM.framework/SharedSupport/ManifestAPI", "-target", "arm64-apple-macos14.0", "-plugin-path", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing", "-sdk", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk", "-swift-version", "6", "-I", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/SharedFrameworks/SwiftPM.framework/SharedSupport/ManifestAPI", "-sdk", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk", "-package-description-version", "6.2.0", "-Xfrontend", "-serialize-diagnostics-path", "-Xfrontend", "/Users/admin/Library/Caches/org.swift.swiftpm/manifests/ManifestLoading/swifty-llvm.dia", "/Package.swift", "-o", "/var/folders/xq/y_g06wb113726d38xsyx71_h0000gn/T/TemporaryDirectory.GUftEF/swifty-llvm-manifest"])
main/Package.swift:152: Fatal error: Unexpectedly found nil while unwrapping an Optional value in https://github.com/hylo-lang/Swifty-LLVM
Resolved source packages:
  spi-builder-workspace: (null)
2026-09-26 02:32:57.072 xcodebuild[710:4117] Writing error result bundle to /var/folders/xq/y_g06wb113726d38xsyx71_h0000gn/T/ResultBundle_2026-26-09_02-32-0057.xcresult
xcodebuild: error: Could not resolve package dependencies:
  Invalid manifest (compiled with: ["/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc", "-vfsoverlay", "/var/folders/xq/y_g06wb113726d38xsyx71_h0000gn/T/TemporaryDirectory.u1LsfT/vfs.yaml", "-L", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/SharedFrameworks/SwiftPM.framework/SharedSupport/ManifestAPI", "-lPackageDescription", "-Xlinker", "-rpath", "-Xlinker", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/SharedFrameworks/SwiftPM.framework/SharedSupport/ManifestAPI", "-target", "arm64-apple-macos14.0", "-plugin-path", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing", "-sdk", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk", "-swift-version", "6", "-I", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/SharedFrameworks/SwiftPM.framework/SharedSupport/ManifestAPI", "-sdk", "/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk", "-package-description-version", "6.2.0", "-Xfrontend", "-serialize-diagnostics-path", "-Xfrontend", "/Users/admin/Library/Caches/org.swift.swiftpm/manifests/ManifestLoading/swifty-llvm.dia", "/Package.swift", "-o", "/var/folders/xq/y_g06wb113726d38xsyx71_h0000gn/T/TemporaryDirectory.GUftEF/swifty-llvm-manifest"])
BUILD FAILURE 6.4 macosXcodebuild