Swift Package Index

Build Information

Failed to build Failable, reference master (b488d5), with Swift 6.4 for macOS (SPM) on 16 Sep 2026 11:32:52 UTC.

Build Command

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

Build Log

========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/skelpo/failable.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/skelpo/failable
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at b488d50 Merge pull request #5 from skelpo/develop
Cloned https://github.com/skelpo/failable.git
Revision (git rev-parse @):
b488d50046d35243a67860bd8499bfc7fe1b8428
SUCCESS checkout https://github.com/skelpo/failable.git at master
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/skelpo/failable.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]
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[20 / 29] Failable
[30 / 74]
[35 / 74]
[38 / 74]
[39 / 74]
[43 / 74]
[45 / 74]
[48 / 74]
[51 / 74]
[53 / 74]
[54 / 74]
[65 / 74] Failable
error: SwiftCompile normal arm64 failed with a nonzero exit code. Command line:     cd /Users/admin/builder

/Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+BinaryFloatingPoint.swift:27:26: error: 'Float80' is unavailable: Float80 is not available on target platform.
25 |
26 |     /// See [`BinaryFloatingPoint.init(_:)`](https://developer.apple.com/documentation/swift/binaryfloatingpoint/1852769-init).
27 |     public init(_ value: Float80)throws {
   |                          `- error: 'Float80' is unavailable: Float80 is not available on target platform.
28 |         let t = T(value)
29 |         try self.init(t)
Swift.Float80:2:23: note: 'Float80' has been explicitly marked unavailable here
1 | @available(*, unavailable, message: "Float80 is not available on target platform.")
2 | @frozen public struct Float80 {
  |                       `- note: 'Float80' has been explicitly marked unavailable here
3 |     public init()
4 | }
/Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+BinaryInteger.swift:39:17: warning: generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 37 |
 38 |     /// See [`BinaryInteger.init(truncatingIfNeeded:)`](https://developer.apple.com/documentation/swift/binaryinteger/2925529-init).
 39 |     public init<T>(truncatingIfNeeded source: T)throws where T : BinaryInteger {
    |                 `- warning: generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 40 |         let t = T(truncatingIfNeeded: source)
 41 |         try self.init(t)
/Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable.swift:36:24: note: 'T' previously declared here
34 | /// `Dictionary` and `Array` types are not supported for literal initialization yet because array
35 | /// splatting for variadic parameters is not supported yet.
36 | public struct Failable<T, Validations> where Validations: Validation, Validations.Supported == T {
   |                        `- note: 'T' previously declared here
37 |
38 |     /// The underlaying value that has been validated.
/Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Collection.swift:1:1: error: type 'Failable<T, Validations>' does not conform to protocol 'Collection'
 1 | extension Failable: Collection where T: Collection {
   | `- error: type 'Failable<T, Validations>' does not conform to protocol 'Collection'
 2 |
 3 |     /// See [`Collection.SubSequence`](https://developer.apple.com/documentation/swift/collection/1641276-subsequence)
/Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Collection.swift:1:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'Collection'
 1 | extension Failable: Collection where T: Collection {
   | `- error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'Collection'
 2 |
 3 |     /// See [`Collection.SubSequence`](https://developer.apple.com/documentation/swift/collection/1641276-subsequence)
Swift.Collection.subscript:3:10: note: 'subscript(_:)' declared here
1 | protocol Collection {
2 | @available(*, unavailable)
3 |   public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }}
  |          `- note: 'subscript(_:)' declared here
4 |
Swift.Collection.subscript:2:1: note: requirement 'subscript(_:)' declared here
1 | protocol Collection {
2 | subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }}
  | `- note: requirement 'subscript(_:)' declared here
3 |
/Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Collection.swift:30:1: error: type 'Failable<T, Validations>' does not conform to protocol 'BidirectionalCollection'
28 | }
29 |
30 | extension Failable: BidirectionalCollection where T: BidirectionalCollection {
   | `- error: type 'Failable<T, Validations>' does not conform to protocol 'BidirectionalCollection'
31 |
32 |     /// See [`BidirectionalCollection.index(before:)`](https://developer.apple.com/documentation/swift/bidirectionalcollection/1783013-index).
/Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Collection.swift:30:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'BidirectionalCollection'
28 | }
29 |
30 | extension Failable: BidirectionalCollection where T: BidirectionalCollection {
   | `- error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'BidirectionalCollection'
31 |
32 |     /// See [`BidirectionalCollection.index(before:)`](https://developer.apple.com/documentation/swift/bidirectionalcollection/1783013-index).
Swift.Collection.subscript:3:10: note: 'subscript(_:)' declared here
1 | protocol Collection {
2 | @available(*, unavailable)
3 |   public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }}
  |          `- note: 'subscript(_:)' declared here
4 |
Swift.BidirectionalCollection.subscript:2:10: note: requirement 'subscript(_:)' declared here
1 | protocol BidirectionalCollection {
2 | override subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }}
  |          `- note: requirement 'subscript(_:)' declared here
3 |
/Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Collection.swift:38:1: error: type 'Failable<T, Validations>' does not conform to protocol 'RandomAccessCollection'
36 | }
37 |
38 | extension Failable: RandomAccessCollection where T: RandomAccessCollection {}
   | `- error: type 'Failable<T, Validations>' does not conform to protocol 'RandomAccessCollection'
39 |
40 | extension Failable where T: MutableCollection {
/Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Collection.swift:38:1: error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'RandomAccessCollection'
36 | }
37 |
38 | extension Failable: RandomAccessCollection where T: RandomAccessCollection {}
   | `- error: unavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'RandomAccessCollection'
39 |
40 | extension Failable where T: MutableCollection {
Swift.Collection.subscript:3:10: note: 'subscript(_:)' declared here
1 | protocol Collection {
2 | @available(*, unavailable)
3 |   public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }}
  |          `- note: 'subscript(_:)' declared here
4 |
Swift.RandomAccessCollection.subscript:2:10: note: requirement 'subscript(_:)' declared here
1 | protocol RandomAccessCollection {
2 | override subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }}
  |          `- note: requirement 'subscript(_:)' declared here
3 |
Failed frontend command:
/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -emit-module -experimental-skip-non-inlinable-function-bodies-without-types /Users/admin/builder/spi-builder-workspace/Sources/Failable/CodableContainer.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Error.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+BinaryFloatingPoint.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+BinaryInteger.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Bool.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Codable.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Collection.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Comparable.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Error.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+ExpressibleByLiteral.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+FixedWidthInteger.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+FloatingPoint.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Hashable.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Numeric.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Optional.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+RawRepresentable.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Sequence.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+SignedNumeric.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Strideable.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+StringRepresentation.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+UnsignedInteger.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Failable.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Operators.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Validation.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Validations/AppendedValidations.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Validations/CollectionValidations.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Validations/ComparableValidations.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Validations/OptionalValidations.swift /Users/admin/builder/spi-builder-workspace/Sources/Failable/Validations/StringValidations.swift -target arm64-apple-macos12.0 -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 /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/libSwiftMacros.dylib\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server\#SwiftMacros -disable-implicit-swift-modules -Xcc -fno-implicit-modules -Xcc -fno-implicit-module-maps -explicit-swift-module-map-file /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug/Failable-t.build/Objects-normal/arm64/Failable-dependencies-1.json -Xllvm -aarch64-use-tbi -enable-objc-interop -stack-check -sdk /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk -I /Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug -Isystem /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug -F /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks -module-cache-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SwiftExplicitPrecompiledModules -color-diagnostics -Xcc -fcolor-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=4 -swift-version 5 -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -D Xcode -serialize-debugging-options -enable-experimental-feature DebugDescriptionMacro -empty-abi-descriptor -validate-clang-modules-once -clang-build-session-file /Users/admin/builder/spi-builder-workspace/.build/out/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /Users/admin/builder -enable-anonymous-context-mangled-names -file-compilation-dir /Users/admin/builder -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.build/out/SDKStatCaches.noindex/macosx27.0-26A425-80c5bbf1d171475443272936d42f90a36a22442a12e9d48fe1a705f55a1adfc4.sdkstatcache -Xcc -fmodules-prune-interval\=86400 -Xcc -fmodules-prune-after\=345600 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug/Failable-t.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug/Failable-t.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug/Failable-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name Failable -const-gather-protocols-file /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug/Failable-t.build/Objects-normal/arm64/Failable_const_extract_protocols.json -disable-clang-spi -clang-target arm64-apple-macos27.0 -target-sdk-version 27.0 -target-sdk-name macosx27.0 -in-process-plugin-server-path /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/libSwiftInProcPluginServer.dylib -emit-module-doc-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug/Failable-t.build/Objects-normal/arm64/Failable.swiftdoc -emit-module-source-info-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug/Failable-t.build/Objects-normal/arm64/Failable.swiftsourceinfo -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug/Failable-t.build/Objects-normal/arm64/Failable-Swift.h -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug/Failable-t.build/Objects-normal/arm64/Failable-primary-emit-module.dia -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug/Failable-t.build/Objects-normal/arm64/Failable-primary-emit-module.d -parse-as-library -o /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug/Failable-t.build/Objects-normal/arm64/Failable.swiftmodule -emit-abi-descriptor-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug/Failable-t.build/Objects-normal/arm64/Failable.abi.json
error: Build failed
BUILD FAILURE 6.4 macosSpm