Failable – Build Information – Swift Package Index

Build Information

Failed to build Failable, reference 0.4.0 (b488d5), with Swift 6.4 for Linux on 16 Sep 2026 11:18:18 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-54344845-1":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:basic-6.4-latest swift build --triple x86_64-unknown-linux-gnu 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/skelpo/failable.git
Reference: 0.4.0
Initialized empty Git repository in /host/spi-builder-workspace/.git/
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint:
hint: 	git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint:
hint: 	git branch -m <name>
From https://github.com/skelpo/failable
 * tag               0.4.0      -> FETCH_HEAD
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 0.4.0
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.4
Building package at path:  $PWD
https://github.com/skelpo/failable.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-54344845-1":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:basic-6.4-latest swift build --triple x86_64-unknown-linux-gnu 2>&1
basic-6.4-latest: Pulling from saguaro1/spi-images
Digest: sha256:c77fcce225e223ac0fafed844619173fc6de8d62dd560eeb28db3182af6a282b
Status: Image is up to date for registry.gitlab.com/saguaro1/spi-images:basic-6.4-latest
Building for debugging...
[Pre-planning 1 / 66]
[Planning deferred tasks]
[19 / 27] Failable
error: SwiftCompile normal x86_64 failed with a nonzero exit code. Command line:     cd /host

/host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+BinaryInteger.swift:39:17: [1;33mwarning: [1;39mgeneric parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode[0;0m
 [0;36m37 |[0;0m
 [0;36m38 |[0;0m     /// See [`BinaryInteger.init(truncatingIfNeeded:)`](https://developer.apple.com/documentation/swift/binaryinteger/2925529-init).
 [0;36m39 |[0;0m     public init<T>(truncatingIfNeeded source: T)throws where T : BinaryInteger {
    [0;36m|[0;0m                 `- [1;33mwarning: [1;39mgeneric parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode[0;0m
 [0;36m40 |[0;0m         let t = T(truncatingIfNeeded: source)
 [0;36m41 |[0;0m         try self.init(t)
/host/spi-builder-workspace/Sources/Failable/Failable.swift:36:24: [1;39mnote: [1;39m'T' previously declared here[0;0m
[0;36m34 |[0;0m /// `Dictionary` and `Array` types are not supported for literal initialization yet because array
[0;36m35 |[0;0m /// splatting for variadic parameters is not supported yet.
[0;36m36 |[0;0m public struct Failable<T, Validations> where Validations: Validation, Validations.Supported == T {
   [0;36m|[0;0m                        `- [1;39mnote: [1;39m'T' previously declared here[0;0m
[0;36m37 |[0;0m
[0;36m38 |[0;0m     /// The underlaying value that has been validated.
/host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Collection.swift:1:1: [1;31merror: [1;39mtype 'Failable<T, Validations>' does not conform to protocol 'Collection'[0;0m
 [0;36m1 |[0;0m extension Failable: Collection where T: Collection {
   [0;36m|[0;0m `- [1;31merror: [1;39mtype 'Failable<T, Validations>' does not conform to protocol 'Collection'[0;0m
 [0;36m2 |[0;0m
 [0;36m3 |[0;0m     /// See [`Collection.SubSequence`](https://developer.apple.com/documentation/swift/collection/1641276-subsequence)
/host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Collection.swift:1:1: [1;31merror: [1;39munavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'Collection'[0;0m
 [0;36m1 |[0;0m extension Failable: Collection where T: Collection {
   [0;36m|[0;0m `- [1;31merror: [1;39munavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'Collection'[0;0m
 [0;36m2 |[0;0m
 [0;36m3 |[0;0m     /// See [`Collection.SubSequence`](https://developer.apple.com/documentation/swift/collection/1641276-subsequence)
Swift.Collection.subscript:3:10: [1;39mnote: [1;39m'subscript(_:)' declared here[0;0m
[0;36m1 |[0;0m protocol Collection {
[0;36m2 |[0;0m @available(*, unavailable)
[0;36m3 |[0;0m   public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }}
  [0;36m|[0;0m          `- [1;39mnote: [1;39m'subscript(_:)' declared here[0;0m
[0;36m4 |[0;0m
Swift.Collection.subscript:2:1: [1;39mnote: [1;39mrequirement 'subscript(_:)' declared here[0;0m
[0;36m1 |[0;0m protocol Collection {
[0;36m2 |[0;0m subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }}
  [0;36m|[0;0m `- [1;39mnote: [1;39mrequirement 'subscript(_:)' declared here[0;0m
[0;36m3 |[0;0m
/host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Collection.swift:30:1: [1;31merror: [1;39mtype 'Failable<T, Validations>' does not conform to protocol 'BidirectionalCollection'[0;0m
[0;36m28 |[0;0m }
[0;36m29 |[0;0m
[0;36m30 |[0;0m extension Failable: BidirectionalCollection where T: BidirectionalCollection {
   [0;36m|[0;0m `- [1;31merror: [1;39mtype 'Failable<T, Validations>' does not conform to protocol 'BidirectionalCollection'[0;0m
[0;36m31 |[0;0m
[0;36m32 |[0;0m     /// See [`BidirectionalCollection.index(before:)`](https://developer.apple.com/documentation/swift/bidirectionalcollection/1783013-index).
/host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Collection.swift:30:1: [1;31merror: [1;39munavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'BidirectionalCollection'[0;0m
[0;36m28 |[0;0m }
[0;36m29 |[0;0m
[0;36m30 |[0;0m extension Failable: BidirectionalCollection where T: BidirectionalCollection {
   [0;36m|[0;0m `- [1;31merror: [1;39munavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'BidirectionalCollection'[0;0m
[0;36m31 |[0;0m
[0;36m32 |[0;0m     /// See [`BidirectionalCollection.index(before:)`](https://developer.apple.com/documentation/swift/bidirectionalcollection/1783013-index).
Swift.Collection.subscript:3:10: [1;39mnote: [1;39m'subscript(_:)' declared here[0;0m
[0;36m1 |[0;0m protocol Collection {
[0;36m2 |[0;0m @available(*, unavailable)
[0;36m3 |[0;0m   public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }}
  [0;36m|[0;0m          `- [1;39mnote: [1;39m'subscript(_:)' declared here[0;0m
[0;36m4 |[0;0m
Swift.BidirectionalCollection.subscript:2:10: [1;39mnote: [1;39mrequirement 'subscript(_:)' declared here[0;0m
[0;36m1 |[0;0m protocol BidirectionalCollection {
[0;36m2 |[0;0m override subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }}
  [0;36m|[0;0m          `- [1;39mnote: [1;39mrequirement 'subscript(_:)' declared here[0;0m
[0;36m3 |[0;0m
/host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Collection.swift:38:1: [1;31merror: [1;39mtype 'Failable<T, Validations>' does not conform to protocol 'RandomAccessCollection'[0;0m
[0;36m36 |[0;0m }
[0;36m37 |[0;0m
[0;36m38 |[0;0m extension Failable: RandomAccessCollection where T: RandomAccessCollection {}
   [0;36m|[0;0m `- [1;31merror: [1;39mtype 'Failable<T, Validations>' does not conform to protocol 'RandomAccessCollection'[0;0m
[0;36m39 |[0;0m
[0;36m40 |[0;0m extension Failable where T: MutableCollection {
/host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Collection.swift:38:1: [1;31merror: [1;39munavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'RandomAccessCollection'[0;0m
[0;36m36 |[0;0m }
[0;36m37 |[0;0m
[0;36m38 |[0;0m extension Failable: RandomAccessCollection where T: RandomAccessCollection {}
   [0;36m|[0;0m `- [1;31merror: [1;39munavailable subscript 'subscript(_:)' was used to satisfy a requirement of protocol 'RandomAccessCollection'[0;0m
[0;36m39 |[0;0m
[0;36m40 |[0;0m extension Failable where T: MutableCollection {
Swift.Collection.subscript:3:10: [1;39mnote: [1;39m'subscript(_:)' declared here[0;0m
[0;36m1 |[0;0m protocol Collection {
[0;36m2 |[0;0m @available(*, unavailable)
[0;36m3 |[0;0m   public subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }}
  [0;36m|[0;0m          `- [1;39mnote: [1;39m'subscript(_:)' declared here[0;0m
[0;36m4 |[0;0m
Swift.RandomAccessCollection.subscript:2:10: [1;39mnote: [1;39mrequirement 'subscript(_:)' declared here[0;0m
[0;36m1 |[0;0m protocol RandomAccessCollection {
[0;36m2 |[0;0m override subscript(bounds: Range<Self.Index>) -> Self.SubSequence { get }}
  [0;36m|[0;0m          `- [1;39mnote: [1;39mrequirement 'subscript(_:)' declared here[0;0m
[0;36m3 |[0;0m
Failed frontend command:
/usr/bin/swift-frontend -frontend -emit-module -experimental-skip-non-inlinable-function-bodies-without-types /host/spi-builder-workspace/Sources/Failable/CodableContainer.swift /host/spi-builder-workspace/Sources/Failable/Error.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+BinaryFloatingPoint.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+BinaryInteger.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Bool.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Codable.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Collection.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Comparable.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Error.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+ExpressibleByLiteral.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+FixedWidthInteger.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+FloatingPoint.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Hashable.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Numeric.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Optional.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+RawRepresentable.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Sequence.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+SignedNumeric.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+Strideable.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+StringRepresentation.swift /host/spi-builder-workspace/Sources/Failable/Failable+Helpers/Failable+UnsignedInteger.swift /host/spi-builder-workspace/Sources/Failable/Failable.swift /host/spi-builder-workspace/Sources/Failable/Operators.swift /host/spi-builder-workspace/Sources/Failable/Validation.swift /host/spi-builder-workspace/Sources/Failable/Validations/AppendedValidations.swift /host/spi-builder-workspace/Sources/Failable/Validations/CollectionValidations.swift /host/spi-builder-workspace/Sources/Failable/Validations/ComparableValidations.swift /host/spi-builder-workspace/Sources/Failable/Validations/OptionalValidations.swift /host/spi-builder-workspace/Sources/Failable/Validations/StringValidations.swift -target x86_64-unknown-linux-gnu -disable-objc-interop -I /host/spi-builder-workspace/.build/out/Products/Debug-linux-x86_64 -module-cache-path /host/spi-builder-workspace/.build/out/ModuleCache.noindex -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 -external-plugin-path /usr/lib/swift/host/plugins/testing\#/usr/bin/swift-plugin-server -validate-clang-modules-once -clang-build-session-file /host/spi-builder-workspace/.build/out/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /host -enable-anonymous-context-mangled-names -file-compilation-dir /host -Xcc -fno-omit-frame-pointer -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -Xcc -fmodules-prune-interval\=86400 -Xcc -fmodules-prune-after\=345600 -Xcc -I/host/spi-builder-workspace/.build/out/Products/Debug-linux-x86_64/include -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug-linux-x86_64/Failable-t.build/DerivedSources-normal/x86_64 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug-linux-x86_64/Failable-t.build/DerivedSources/x86_64 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug-linux-x86_64/Failable-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name Failable -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug-linux-x86_64/Failable-t.build/Objects-normal/x86_64/Failable_const_extract_protocols.json -in-process-plugin-server-path /usr/lib/swift/host/libSwiftInProcPluginServer.so -plugin-path /usr/lib/swift/host/plugins -plugin-path /usr/local/lib/swift/host/plugins -emit-module-doc-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug-linux-x86_64/Failable-t.build/Objects-normal/x86_64/Modules/Failable.swiftdoc -emit-module-source-info-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug-linux-x86_64/Failable-t.build/Objects-normal/x86_64/Modules/Failable.swiftsourceinfo -emit-objc-header-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug-linux-x86_64/Failable-t.build/Objects-normal/x86_64/Failable-Swift.h -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug-linux-x86_64/Failable-t.build/Objects-normal/x86_64/Failable-primary-emit-module.dia -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug-linux-x86_64/Failable-t.build/Objects-normal/x86_64/Failable-primary-emit-module.d -parse-as-library -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/Failable.build/Debug-linux-x86_64/Failable-t.build/Objects-normal/x86_64/Modules/Failable.swiftmodule
error: Build failed
BUILD FAILURE 6.4 linux