Swift Package Index

Build Information

Failed to build Honeycrisp, reference main (0016ca), with Swift 6.4 for macOS (SPM) on 22 Sep 2026 08:59:55 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.
========================================
Checkout
========================================
Clone URL: https://github.com/unixpickle/honeycrisp.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/unixpickle/honeycrisp
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 0016cad cleanup sampling
Cloned https://github.com/unixpickle/honeycrisp.git
Revision (git rev-parse @):
0016cad22f163daf8b2cd0b46a1a25ca6a6b6e08
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/unixpickle/honeycrisp.git at main
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/unixpickle/honeycrisp.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64
Building for debugging...
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/Users/admin/builder/spi-builder-workspace/Sources/Honeycrisp/DataUtil.swift:58:27: warning: capture of non-Sendable type 'S.Iterator.Type' in an isolated closure [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/sendable-metatypes\SendableMetatypes]8;;\]
 56 |     return AsyncThrowingStream(bufferingPolicy: .bufferingOldest(bufferSize)) { continuation in
 57 |       let thread = Thread {
 58 |         var it = sendIt.s.makeIterator()
    |                           `- warning: capture of non-Sendable type 'S.Iterator.Type' in an isolated closure [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/sendable-metatypes\SendableMetatypes]8;;\]
 59 |         while true {
 60 |           var maybeX: Result<T, Error>?
/Users/admin/builder/spi-builder-workspace/Sources/Honeycrisp/DataUtil.swift:58:25: warning: capture of non-Sendable type 'S.Type' in an isolated closure [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/sendable-metatypes\SendableMetatypes]8;;\]
 56 |     return AsyncThrowingStream(bufferingPolicy: .bufferingOldest(bufferSize)) { continuation in
 57 |       let thread = Thread {
 58 |         var it = sendIt.s.makeIterator()
    |                         `- warning: capture of non-Sendable type 'S.Type' in an isolated closure [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/sendable-metatypes\SendableMetatypes]8;;\]
 59 |         while true {
 60 |           var maybeX: Result<T, Error>?
[#SendableMetatypes]: <https://docs.swift.org/compiler/documentation/diagnostics/sendable-metatypes>
/Users/admin/builder/spi-builder-workspace/Sources/Honeycrisp/BackendMPS.swift:597:12: warning: unstructured throwing task created by 'detached(name:priority:operation:)' is not used, which may accidentally ignore errors thrown inside the task [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/no-use-throwing-unstructured-task\NoUseUnstructuredThrowingTask]8;;\]
 595 |     }
 596 |     let result: SendableResult = try await withCheckedThrowingContinuation { outerContinuation in
 597 |       Task.detached {
     |            |- warning: unstructured throwing task created by 'detached(name:priority:operation:)' is not used, which may accidentally ignore errors thrown inside the task [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/no-use-throwing-unstructured-task\NoUseUnstructuredThrowingTask]8;;\]
     |            `- note: to silence this warning, handle the error inside the task, or store/discard the task value explicitly
 598 |         try await data.onCPU { cpuBuffer in
 599 |           try await withCheckedThrowingContinuation {
[#NoUseUnstructuredThrowingTask]: <https://docs.swift.org/compiler/documentation/diagnostics/no-use-throwing-unstructured-task>
/Users/admin/builder/spi-builder-workspace/Sources/Honeycrisp/Trainable.swift:193:11: warning: capture of non-Sendable type 'TensorType.Type' in an isolated closure [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/sendable-metatypes\SendableMetatypes]8;;\]
191 |         }
192 |         return data.maybeOnGrad { g in
193 |           param.addGrad(g)
    |           `- warning: capture of non-Sendable type 'TensorType.Type' in an isolated closure [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/sendable-metatypes\SendableMetatypes]8;;\]
194 |         }
195 |       }
[#SendableMetatypes]: <https://docs.swift.org/compiler/documentation/diagnostics/sendable-metatypes>
/Users/admin/builder/spi-builder-workspace/Sources/Honeycrisp/BackendMPS.swift:98:14: warning: unstructured throwing task created by 'detached(name:priority:operation:)' is not used, which may accidentally ignore errors thrown inside the task [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/no-use-throwing-unstructured-task\NoUseUnstructuredThrowingTask]8;;\]
  96 |       if let deallocator = deallocator {
  97 |         let completion = completion
  98 |         Task.detached {
     |              |- warning: unstructured throwing task created by 'detached(name:priority:operation:)' is not used, which may accidentally ignore errors thrown inside the task [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/no-use-throwing-unstructured-task\NoUseUnstructuredThrowingTask]8;;\]
     |              `- note: to silence this warning, handle the error inside the task, or store/discard the task value explicitly
  99 |           // Don't deallocate until we have actually completed the kernel call.
 100 |           if let completion = completion {
/Users/admin/builder/spi-builder-workspace/Sources/Honeycrisp/BackendMPS.swift:597:12: warning: unstructured throwing task created by 'detached(name:priority:operation:)' is not used, which may accidentally ignore errors thrown inside the task [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/no-use-throwing-unstructured-task\NoUseUnstructuredThrowingTask]8;;\]
 595 |     }
 596 |     let result: SendableResult = try await withCheckedThrowingContinuation { outerContinuation in
 597 |       Task.detached {
     |            |- warning: unstructured throwing task created by 'detached(name:priority:operation:)' is not used, which may accidentally ignore errors thrown inside the task [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/no-use-throwing-unstructured-task\NoUseUnstructuredThrowingTask]8;;\]
     |            `- note: to silence this warning, handle the error inside the task, or store/discard the task value explicitly
 598 |         try await data.onCPU { cpuBuffer in
 599 |           try await withCheckedThrowingContinuation {
/Users/admin/builder/spi-builder-workspace/Sources/Honeycrisp/BackendMPS.swift:2704:20: warning: capture of 'buf' with non-Sendable type 'MPSCommandBuffer' in a '@Sendable' closure [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/sendable-closure-captures\SendableClosureCaptures]8;;\]
2702 |     buf.addCompletedHandler { _ in
2703 |       let result: Result<(), Error> =
2704 |         if let e = buf.error {
     |                    `- warning: capture of 'buf' with non-Sendable type 'MPSCommandBuffer' in a '@Sendable' closure [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/sendable-closure-captures\SendableClosureCaptures]8;;\]
2705 |           Result.failure(e)
2706 |         } else {
/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/MetalPerformanceShaders.framework/Frameworks/MPSCore.framework/Headers/MPSCommandBuffer.h:124:12: note: class 'MPSCommandBuffer' does not conform to the 'Sendable' protocol
122 |  */
123 | MPS_CLASS_AVAILABLE_STARTING( macos(10.15), ios(13.0), macCatalyst(13.0), tvos(13.0))
124 | @interface MPSCommandBuffer : NSObject <MTLCommandBuffer>
    |            `- note: class 'MPSCommandBuffer' does not conform to the 'Sendable' protocol
125 |
126 | /*! @property   commandBuffer
/Users/admin/builder/spi-builder-workspace/Sources/Honeycrisp/BackendMPS.swift:5:1: warning: add '@preconcurrency' to treat 'Sendable'-related errors from module 'MetalPerformanceShaders' as warnings [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/add-preconcurrency-import\AddPreconcurrencyImport]8;;\]
   3 | import HCBacktrace
   4 | @preconcurrency import Metal
   5 | import MetalPerformanceShaders
     | `- warning: add '@preconcurrency' to treat 'Sendable'-related errors from module 'MetalPerformanceShaders' as warnings [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/add-preconcurrency-import\AddPreconcurrencyImport]8;;\]
   6 | import MetalPerformanceShadersGraph
   7 |
/Users/admin/builder/spi-builder-workspace/Sources/Honeycrisp/BackendMPS.swift:2712:7: warning: capture of 'cb' with non-Sendable type 'MPSBackend.CompletionCallback' in a '@Sendable' closure [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/sendable-closure-captures\SendableClosureCaptures]8;;\]
2661 |   }
2662 |
2663 |   class CompletionCallback {
     |         `- note: class 'CompletionCallback' does not conform to the 'Sendable' protocol
2664 |     private var lock: NSLock = NSLock()
2665 |     private var _result: Result<(), Error>? = nil
     :
2710 |         x()
2711 |       }
2712 |       cb.putResult(result)
     |       `- warning: capture of 'cb' with non-Sendable type 'MPSBackend.CompletionCallback' in a '@Sendable' closure [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/sendable-closure-captures\SendableClosureCaptures]8;;\]
2713 |     }
2714 |     buf.commit()
[#AddPreconcurrencyImport]: <https://docs.swift.org/compiler/documentation/diagnostics/add-preconcurrency-import>
[#NoUseUnstructuredThrowingTask]: <https://docs.swift.org/compiler/documentation/diagnostics/no-use-throwing-unstructured-task>
[#SendableClosureCaptures]: <https://docs.swift.org/compiler/documentation/diagnostics/sendable-closure-captures>
error: SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/HCTestUtils/BackendTests.swift failed with a nonzero exit code. Command line:     cd /Users/admin/builder
    builtin-SwiftPerFileCompile BackendTests.swift
/Users/admin/builder/spi-builder-workspace/Sources/HCTestUtils/BackendTests.swift:420:5: error: the compiler is unable to type-check this expression in reasonable time; try breaking up the expression into distinct sub-expressions
 418 |     var gradC: Tensor?
 419 |     let sumC = input1.onGradUnsafe({ g in gradC = g }).sum(axis: 1)
 420 |     try await assertDataEqual(sumC, Array([1 + 3, 2 + 4, 5 + 7, 6 + 8].map { Float($0) }))
     |     `- error: the compiler is unable to type-check this expression in reasonable time; try breaking up the expression into distinct sub-expressions
 421 |     sumC.backward(Tensor(data: [-1, -2, -3, -4], shape: [2, 2], dtype: .float32))
 422 |     try await assertDataEqual(gradC!, [-1, -2, -1, -2, -3, -4, -3, -4])
/Users/admin/builder/spi-builder-workspace/Sources/HCTestUtils/BackendTests.swift:1079:5: error: the compiler is unable to type-check this expression in reasonable time; try breaking up the expression into distinct sub-expressions
1077 |       grad: [-2, -4, -6, 2, 4, 6]
1078 |     ) { $0.pow(2) }
1079 |     try await testF(
     |     `- error: the compiler is unable to type-check this expression in reasonable time; try breaking up the expression into distinct sub-expressions
1080 |       input: [-1, -2, -3, 1, 2, 3],
1081 |       output: [1.0 / -1.0, 1.0 / -2.0, 1.0 / -3.0, 1.0, 1.0 / 2.0, 1.0 / 3.0].map({ Float($0) }),
Failed frontend command:
/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -c /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Honeycrisp.build/Debug/HCTestUtils-t.build/DerivedSources/resource_bundle_accessor.swift /Users/admin/builder/spi-builder-workspace/Sources/HCTestUtils/Assertions.swift -primary-file /Users/admin/builder/spi-builder-workspace/Sources/HCTestUtils/BackendTests.swift /Users/admin/builder/spi-builder-workspace/Sources/HCTestUtils/Unsafe.swift -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Honeycrisp.build/Debug/HCTestUtils-t.build/Objects-normal/arm64/BackendTests.d -emit-const-values-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Honeycrisp.build/Debug/HCTestUtils-t.build/Objects-normal/arm64/BackendTests.swiftconstvalues -emit-reference-dependencies-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Honeycrisp.build/Debug/HCTestUtils-t.build/Objects-normal/arm64/BackendTests.swiftdeps -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Honeycrisp.build/Debug/HCTestUtils-t.build/Objects-normal/arm64/BackendTests.dia -target arm64-apple-macos13.0 -disable-cross-import-overlay-search -load-resolved-plugin /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libFoundationMacros.dylib\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server\#FoundationMacros -load-resolved-plugin \#/Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug/HCBacktraceMacros\#HCBacktraceMacros -load-resolved-plugin /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libObservationMacros.dylib\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server\#ObservationMacros -load-resolved-plugin /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libPreviewsMacros.dylib\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server\#PreviewsMacros -load-resolved-plugin /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libSwiftMacros.dylib\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server\#SwiftMacros -load-resolved-plugin 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error: Build failed
BUILD FAILURE 6.4 macosSpm