Principle – Build Information – Swift Package Index

Build Information

Failed to build Principle, reference 2.0.0 (3a14a1), with Swift 6.4 for Wasm on 23 Sep 2026 10:13:22 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-54344847-0":/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:wasm-6.4-latest swift build --swift-sdk swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/NSFatalError/Principle.git
Reference: 2.0.0
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/NSFatalError/Principle
 * tag               2.0.0      -> FETCH_HEAD
HEAD is now at 3a14a1f Prepared package for Swift 6.2 (#12)
Cloned https://github.com/NSFatalError/Principle.git
Revision (git rev-parse @):
3a14a1f47a3b4ef1df35a204e0aefc15024b9b0a
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/NSFatalError/Principle.git at 2.0.0
========================================
Build
========================================
Selected platform:         wasm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/NSFatalError/Principle.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-54344847-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:wasm-6.4-latest swift build --swift-sdk swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm 2>&1
wasm-6.4-latest: Pulling from saguaro1/spi-images
Digest: sha256:4328fdb43c680d205c1d6761b1e3267aa38277eefdda9ddfb17b6a0f1a77857a
Status: Image is up to date for registry.gitlab.com/saguaro1/spi-images:wasm-6.4-latest
Building for debugging...
[Pre-planning 1 / 182]
[39 / 63] PrincipleConcurrency
[44 / 63] PrincipleCollections
[57 / 66] PrincipleCollections
error: SwiftCompile normal wasm32 /host/spi-builder-workspace/Sources/PrincipleConcurrency/SingleUseTransfer.swift failed with a nonzero exit code. Command line:     cd /host
    builtin-SwiftPerFileCompile SingleUseTransfer.swift
/host/spi-builder-workspace/Sources/PrincipleConcurrency/SingleUseTransfer.swift:86:20: [1;31merror: [1;39mreturning 'wrapped' as a 'sending' result risks causing data races[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/region-isolation\RegionIsolation]8;;\]
[0;36m84 |[0;0m         case let .some(wrapped):
[0;36m85 |[0;0m             self = .init()
[0;36m86 |[0;0m             return wrapped
   [0;36m|[0;0m                    |- [1;31merror: [1;39mreturning 'wrapped' as a 'sending' result risks causing data races[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/region-isolation\RegionIsolation]8;;\]
   [0;36m|[0;0m                    `- [1;39mnote: [1;39mreturning 'wrapped' risks causing data races since the caller assumes that 'wrapped' can be safely sent to other isolation domains[0;0m
[0;36m87 |[0;0m         }
[0;36m88 |[0;0m     }
[#RegionIsolation]: <https://docs.swift.org/compiler/documentation/diagnostics/region-isolation>
Failed frontend command:
/usr/bin/swift-frontend -frontend -c /host/spi-builder-workspace/Sources/PrincipleConcurrency/DeadlineExceededError.swift -primary-file /host/spi-builder-workspace/Sources/PrincipleConcurrency/SingleUseTransfer.swift /host/spi-builder-workspace/Sources/PrincipleConcurrency/TaskTimeLimit.swift /host/spi-builder-workspace/Sources/PrincipleConcurrency/TimeoutError.swift -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Principle.build/Debug-webassembly-wasm32/PrincipleConcurrency-t.build/Objects-normal/wasm32/SingleUseTransfer.d -emit-const-values-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Principle.build/Debug-webassembly-wasm32/PrincipleConcurrency-t.build/Objects-normal/wasm32/SingleUseTransfer.swiftconstvalues -emit-reference-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Principle.build/Debug-webassembly-wasm32/PrincipleConcurrency-t.build/Objects-normal/wasm32/SingleUseTransfer.swiftdeps -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Principle.build/Debug-webassembly-wasm32/PrincipleConcurrency-t.build/Objects-normal/wasm32/SingleUseTransfer.dia -target wasm32-unknown-wasip1 -disable-objc-interop -sdk /root/.swiftpm/swift-sdks/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm.artifactbundle/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm/wasm32-unknown-wasip1/WASI.sdk -sysroot /root/.swiftpm/swift-sdks/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm.artifactbundle/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm/wasm32-unknown-wasip1/WASI.sdk -I /host/spi-builder-workspace/.build/out/Products/Debug-webassembly-wasm32 -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 6 -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -D Xcode -serialize-debugging-options -enable-upcoming-feature ExistentialAny -enable-upcoming-feature MemberImportVisibility -enable-upcoming-feature NonisolatedNonsendingByDefault -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 -resource-dir /root/.swiftpm/swift-sdks/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm.artifactbundle/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm/wasm32-unknown-wasip1/swift.xctoolchain/usr/lib/swift_static -use-static-resource-dir -enable-anonymous-context-mangled-names -file-compilation-dir /host -Xcc -resource-dir -Xcc /root/.swiftpm/swift-sdks/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm.artifactbundle/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm/wasm32-unknown-wasip1/swift.xctoolchain/usr/lib/swift_static/clang -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-webassembly-wasm32/include -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Principle.build/Debug-webassembly-wasm32/PrincipleConcurrency-t.build/DerivedSources-normal/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Principle.build/Debug-webassembly-wasm32/PrincipleConcurrency-t.build/DerivedSources/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Principle.build/Debug-webassembly-wasm32/PrincipleConcurrency-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name PrincipleConcurrency -package-name spi_builder_workspace -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/Principle.build/Debug-webassembly-wasm32/PrincipleConcurrency-t.build/Objects-normal/wasm32/PrincipleConcurrency_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/Principle.build/Debug-webassembly-wasm32/PrincipleConcurrency-t.build/Objects-normal/wasm32/SingleUseTransfer.o -index-unit-output-path /Principle.build/Debug-webassembly-wasm32/PrincipleConcurrency-t.build/Objects-normal/wasm32/SingleUseTransfer.o -index-store-path /host/spi-builder-workspace/.build/out -index-system-modules
error: Build failed
BUILD FAILURE 6.4 wasm