Swift Package Index

Build Information

Failed to build UniYAML, reference master (1628bc), with Swift 6.4 for Linux on 16 Sep 2026 05:51:42 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-54344845-0":/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/seznam/swift-uniyaml.git
Reference: master
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/seznam/swift-uniyaml
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 1628bc6 Update README.md.
Cloned https://github.com/seznam/swift-uniyaml.git
Revision (git rev-parse @):
1628bc64f558f0f43c3126c5da1b5e99ecebd129
SUCCESS checkout https://github.com/seznam/swift-uniyaml.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.4
Building package at path:  $PWD
https://github.com/seznam/swift-uniyaml.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-54344845-0":/host -w "$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...
[Planning deferred tasks]
[23 / 31] UniYAML
[28 / 31] UniYAML
error: SwiftCompile normal x86_64 /host/spi-builder-workspace/Sources/UniYAML/YAML.swift failed with a nonzero exit code. Command line:     cd /host
    builtin-SwiftPerFileCompile YAML.swift
/host/spi-builder-workspace/Sources/UniYAML/YAML.swift:218:12: error: cannot assign to property: 'key' is a 'let' constant
 34 | 	let indent: Int
 35 | 	var type: YAMLType
 36 | 	let key: String?
    |  `- note: change 'let' to 'var' to make it mutable
 37 | 	let tag: String?
 38 | 	var value: Any?
    :
216 | 				return nil
217 | 			}
218 | 			obj[k]!.key = k
    |            `- error: cannot assign to property: 'key' is a 'let' constant
219 | 		}
220 | 		indent = 0
Failed frontend command:
/usr/bin/swift-frontend -frontend -c /host/spi-builder-workspace/Sources/UniYAML/Decoder.swift /host/spi-builder-workspace/Sources/UniYAML/Encoder.swift -primary-file /host/spi-builder-workspace/Sources/UniYAML/YAML.swift -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/UniYAML.build/Debug-linux-x86_64/UniYAML-t.build/Objects-normal/x86_64/YAML.d -emit-const-values-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/UniYAML.build/Debug-linux-x86_64/UniYAML-t.build/Objects-normal/x86_64/YAML.swiftconstvalues -emit-reference-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/UniYAML.build/Debug-linux-x86_64/UniYAML-t.build/Objects-normal/x86_64/YAML.swiftdeps -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/UniYAML.build/Debug-linux-x86_64/UniYAML-t.build/Objects-normal/x86_64/YAML.dia -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/UniYAML.build/Debug-linux-x86_64/UniYAML-t.build/DerivedSources-normal/x86_64 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/UniYAML.build/Debug-linux-x86_64/UniYAML-t.build/DerivedSources/x86_64 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/UniYAML.build/Debug-linux-x86_64/UniYAML-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name UniYAML -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/UniYAML.build/Debug-linux-x86_64/UniYAML-t.build/Objects-normal/x86_64/UniYAML_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 -parse-as-library -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/UniYAML.build/Debug-linux-x86_64/UniYAML-t.build/Objects-normal/x86_64/YAML.o -index-unit-output-path /UniYAML.build/Debug-linux-x86_64/UniYAML-t.build/Objects-normal/x86_64/YAML.o -index-store-path /host/spi-builder-workspace/.build/out -index-system-modules
/host/spi-builder-workspace/Sources/UniYAML/Decoder.swift:58:9: warning: variable 'anchor' was written to, but never read
 56 | 				}
 57 | 				var key: String?
 58 | 				var anchor: String?
    |         `- warning: variable 'anchor' was written to, but never read
 59 | 				var tag: String?
 60 | 				var value: String?
error: Build failed
BUILD FAILURE 6.4 linux