swift-io – Build Information – Swift Package Index

Build Information

Failed to build swift-io, reference 3.4.0 (5698f2), with Swift 6.4 for Wasm on 19 Sep 2026 06:00:33 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-54344843-0":/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/rarestype/swift-io.git
Reference: 3.4.0
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/rarestype/swift-io
 * tag               3.4.0      -> FETCH_HEAD
HEAD is now at 5698f2c [release]: 3.4.0
Cloned https://github.com/rarestype/swift-io.git
Revision (git rev-parse @):
5698f2c070523957a480946c412922237c3b02ae
SUCCESS checkout https://github.com/rarestype/swift-io.git at 3.4.0
========================================
Build
========================================
Selected platform:         wasm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/rarestype/swift-io.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-54344843-0":/host -w "$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
Fetching https://github.com/apple/swift-system
Fetching https://github.com/apple/swift-argument-parser
Fetching https://github.com/ordo-one/dollup
[1/44] Fetching dollup
Fetched https://github.com/ordo-one/dollup (0.40s)
[1/6898] Fetching swift-system
[3726/25816] Fetching swift-system, swift-argument-parser
Fetched https://github.com/apple/swift-system (0.63s)
[2649/18918] Fetching swift-argument-parser
Fetched https://github.com/apple/swift-argument-parser (0.81s)
Computing version for https://github.com/apple/swift-argument-parser
Computed https://github.com/apple/swift-argument-parser at 1.8.2 (0.98s)
Computing version for https://github.com/ordo-one/dollup
Computed https://github.com/ordo-one/dollup at 1.0.8 (0.14s)
Computing version for https://github.com/apple/swift-system
Computed https://github.com/apple/swift-system at 1.8.1 (0.21s)
Creating working copy for https://github.com/apple/swift-argument-parser
Working copy of https://github.com/apple/swift-argument-parser resolved at 1.8.2
Creating working copy for https://github.com/ordo-one/dollup
Working copy of https://github.com/ordo-one/dollup resolved at 1.0.8
Creating working copy for https://github.com/apple/swift-system
Working copy of https://github.com/apple/swift-system resolved at 1.8.1
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Building for debugging...
[Computing dependencies]
[Pre-planning 1 / 330]
[Starting]
[64 / 124] SystemPackage
[66 / 124] SystemPackage
[81 / 124] SystemPackage
[85 / 124] SystemPackage-product
[93 / 128] SystemCalls
[99 / 146] ArgumentParser
[101 / 146] SystemIO
[102 / 146] SystemIO
[107 / 146] SystemIO
[112 / 146] SystemIO-product
[115 / 146] ArgumentParser
[122 / 148] SystemPackage
[131 / 152] System_ArgumentParser
[137 / 152] System_ArgumentParser
error: SwiftCompile normal wasm32 /host/spi-builder-workspace/Sources/SystemAsync/Subprocess.swift failed with a nonzero exit code. Command line:     cd /host
    builtin-SwiftPerFileCompile Subprocess.swift
/host/spi-builder-workspace/Sources/SystemAsync/FileDescriptor (ext).swift:6:8: [1;31merror: [1;39munsupported platform[0;0m
 [0;36m4 |[0;0m import Darwin
 [0;36m5 |[0;0m #else
 [0;36m6 |[0;0m #error([4;39m"unsupported platform"[0;0m)
   [0;36m|[0;0m        `- [1;31merror: [1;39munsupported platform[0;0m
 [0;36m7 |[0;0m #endif
 [0;36m8 |[0;0m
/host/spi-builder-workspace/Sources/SystemAsync/FileDescriptor (ext).swift:9:17: [1;31merror: [1;39mno such module 'Dispatch'[0;0m
 [0;36m7 |[0;0m #endif
 [0;36m8 |[0;0m
 [0;36m9 |[0;0m internal import Dispatch
   [0;36m|[0;0m                 `- [1;31merror: [1;39mno such module 'Dispatch'[0;0m
[0;36m10 |[0;0m internal import SystemIO
[0;36m11 |[0;0m internal import SystemPackage
Failed frontend command:
/usr/bin/swift-frontend -frontend -c /host/spi-builder-workspace/Sources/SystemAsync/FileControlError.swift /host/spi-builder-workspace/Sources/SystemAsync/FileDescriptor\ \(ext\).swift -primary-file /host/spi-builder-workspace/Sources/SystemAsync/Subprocess.swift /host/spi-builder-workspace/Sources/SystemAsync/SubprocessError.swift /host/spi-builder-workspace/Sources/SystemAsync/SystemRuntimeError.swift -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-io.build/Debug-webassembly-wasm32/SystemAsync-t.build/Objects-normal/wasm32/Subprocess.d -emit-const-values-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-io.build/Debug-webassembly-wasm32/SystemAsync-t.build/Objects-normal/wasm32/Subprocess.swiftconstvalues -emit-reference-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-io.build/Debug-webassembly-wasm32/SystemAsync-t.build/Objects-normal/wasm32/Subprocess.swiftdeps -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-io.build/Debug-webassembly-wasm32/SystemAsync-t.build/Objects-normal/wasm32/Subprocess.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 InternalImportsByDefault -enable-experimental-feature StrictConcurrency -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 -fmodule-map-file\=/host/spi-builder-workspace/.build/checkouts/swift-system/Sources/CSystem/include/module.modulemap -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/checkouts/swift-system/Sources/CSystem/include -Xcc -I/host/spi-builder-workspace/.build/out/Products/Debug-webassembly-wasm32/include -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-io.build/Debug-webassembly-wasm32/SystemAsync-t.build/DerivedSources-normal/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-io.build/Debug-webassembly-wasm32/SystemAsync-t.build/DerivedSources/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-io.build/Debug-webassembly-wasm32/SystemAsync-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name SystemAsync -package-name spi_builder_workspace -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-io.build/Debug-webassembly-wasm32/SystemAsync-t.build/Objects-normal/wasm32/SystemAsync_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/swift-io.build/Debug-webassembly-wasm32/SystemAsync-t.build/Objects-normal/wasm32/Subprocess.o -index-unit-output-path /swift-io.build/Debug-webassembly-wasm32/SystemAsync-t.build/Objects-normal/wasm32/Subprocess.o -index-store-path /host/spi-builder-workspace/.build/out -index-system-modules
error: Build failed
BUILD FAILURE 6.4 wasm