Light-Swift-Untar – Build Information

Build Information

Failed to build Light-Swift-Untar, reference main (0facd9), with Swift 6.4 for Wasm on 24 Sep 2026 03:29:39 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-54344844-0":/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/UInt2048/Light-Swift-Untar.git
Reference: main
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/UInt2048/Light-Swift-Untar
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 0facd92 Fix URL unwrap fatal error in xcode preview (#4)
Cloned https://github.com/UInt2048/Light-Swift-Untar.git
Revision (git rev-parse @):
0facd92faa289d38beb0401361557c6d53129788
SUCCESS checkout https://github.com/UInt2048/Light-Swift-Untar.git at main
========================================
Build
========================================
Selected platform:         wasm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/UInt2048/Light-Swift-Untar.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-54344844-0":/host -w "$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...
[Planning deferred tasks]
[20 / 28] Light-Swift-Untar
error: SwiftCompile normal wasm32 /host/spi-builder-workspace/Light-Swift-Untar.swift failed with a nonzero exit code. Command line:     cd /host
    builtin-SwiftPerFileCompile Light-Swift-Untar.swift
/host/spi-builder-workspace/Light-Swift-Untar.swift:96:7: [1;33mwarning: [1;39mresult of call to 'createFile(atPath:contents:attributes:)' is unused[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/no-usage\NoUsage]8;;\]
 [0;36m94 |[0;0m                              path: String) {
 [0;36m95 |[0;0m     if let data = object as? Data {
 [0;36m96 |[0;0m       createFile(atPath: path, contents: data.subdata(in: Int(_loc) ..< Int(_loc + _len)),
    [0;36m|[0;0m       `- [1;33mwarning: [1;39mresult of call to 'createFile(atPath:contents:attributes:)' is unused[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/no-usage\NoUsage]8;;\]
 [0;36m97 |[0;0m                  attributes: nil)
 [0;36m98 |[0;0m     } else if let fileHandle = object as? FileHandle {
/host/spi-builder-workspace/Light-Swift-Untar.swift:99:19: [1;31merror: [1;39m'write(toFile:atomically:)' is unavailable: WASI does not support atomic file-writing as it does not have temporary directories[0;0m
 [0;36m97 |[0;0m                  attributes: nil)
 [0;36m98 |[0;0m     } else if let fileHandle = object as? FileHandle {
 [0;36m99 |[0;0m       if NSData().[4;39mwrite[0;0m(toFile: path, atomically: false) {
    [0;36m|[0;0m                   `- [1;31merror: [1;39m'write(toFile:atomically:)' is unavailable: WASI does not support atomic file-writing as it does not have temporary directories[0;0m
[0;36m100 |[0;0m         let destinationFile = FileHandle(forWritingAtPath: path)!
[0;36m101 |[0;0m         fileHandle.seek(toFileOffset: _loc)
Foundation.NSData.write:3:13: [1;39mnote: [1;39m'write(toFile:atomically:)' has been explicitly marked unavailable here[0;0m
[0;36m1 |[0;0m class NSData {
[0;36m2 |[0;0m @available(*, unavailable, message: "WASI does not support atomic file-writing as it does not have temporary directories")
[0;36m3 |[0;0m   open func write(toFile path: String, atomically useAuxiliaryFile: Bool) -> Bool}
  [0;36m|[0;0m             `- [1;39mnote: [1;39m'write(toFile:atomically:)' has been explicitly marked unavailable here[0;0m
[0;36m4 |[0;0m
/host/spi-builder-workspace/Light-Swift-Untar.swift:106:11: [1;31merror: [1;39mcannot find 'autoreleasepool' in scope[0;0m
[0;36m104 |[0;0m         var length = _len, location = _loc
[0;36m105 |[0;0m         while length > maxSize {
[0;36m106 |[0;0m           [4;39mautoreleasepool[0;0m { // Needed to prevent heap overflow when reading large files
    [0;36m|[0;0m           `- [1;31merror: [1;39mcannot find 'autoreleasepool' in scope[0;0m
[0;36m107 |[0;0m             destinationFile.write(fileHandle.readData(ofLength: Int(maxSize)))
[0;36m108 |[0;0m           }
/host/spi-builder-workspace/Light-Swift-Untar.swift:112:9: [1;31merror: [1;39mcannot find 'autoreleasepool' in scope[0;0m
[0;36m110 |[0;0m           length -= maxSize
[0;36m111 |[0;0m         }
[0;36m112 |[0;0m         [4;39mautoreleasepool[0;0m { // Needed to prevent heap overflow when reading large files
    [0;36m|[0;0m         `- [1;31merror: [1;39mcannot find 'autoreleasepool' in scope[0;0m
[0;36m113 |[0;0m           destinationFile.write(fileHandle.readData(ofLength: Int(length)))
[0;36m114 |[0;0m         }
/host/spi-builder-workspace/Light-Swift-Untar.swift:125:14: [1;31merror: [1;39mcannot find 'autoreleasepool' in scope[0;0m
[0;36m123 |[0;0m     } else if let fileHandle = object as? FileHandle {
[0;36m124 |[0;0m       fileHandle.seek(toFileOffset: location)
[0;36m125 |[0;0m       return [4;39mautoreleasepool[0;0m { // Needed to prevent heap overflow when reading large files
    [0;36m|[0;0m              `- [1;31merror: [1;39mcannot find 'autoreleasepool' in scope[0;0m
[0;36m126 |[0;0m         fileHandle.readData(ofLength: Int(length))
[0;36m127 |[0;0m       }
[#NoUsage]: <https://docs.swift.org/compiler/documentation/diagnostics/no-usage>
Failed frontend command:
/usr/bin/swift-frontend -frontend -c -primary-file /host/spi-builder-workspace/Light-Swift-Untar.swift -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Light-Swift-Untar.build/Debug-webassembly-wasm32/Light-Swift-Untar-t.build/Objects-normal/wasm32/Light-Swift-Untar.d -emit-const-values-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Light-Swift-Untar.build/Debug-webassembly-wasm32/Light-Swift-Untar-t.build/Objects-normal/wasm32/Light-Swift-Untar.swiftconstvalues -emit-reference-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Light-Swift-Untar.build/Debug-webassembly-wasm32/Light-Swift-Untar-t.build/Objects-normal/wasm32/Light-Swift-Untar.swiftdeps -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Light-Swift-Untar.build/Debug-webassembly-wasm32/Light-Swift-Untar-t.build/Objects-normal/wasm32/Light-Swift-Untar.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 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 -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/Light-Swift-Untar.build/Debug-webassembly-wasm32/Light-Swift-Untar-t.build/DerivedSources-normal/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Light-Swift-Untar.build/Debug-webassembly-wasm32/Light-Swift-Untar-t.build/DerivedSources/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Light-Swift-Untar.build/Debug-webassembly-wasm32/Light-Swift-Untar-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name Light_Swift_Untar -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/Light-Swift-Untar.build/Debug-webassembly-wasm32/Light-Swift-Untar-t.build/Objects-normal/wasm32/Light-Swift-Untar_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/Light-Swift-Untar.build/Debug-webassembly-wasm32/Light-Swift-Untar-t.build/Objects-normal/wasm32/Light-Swift-Untar.o -index-unit-output-path /Light-Swift-Untar.build/Debug-webassembly-wasm32/Light-Swift-Untar-t.build/Objects-normal/wasm32/Light-Swift-Untar.o -index-store-path /host/spi-builder-workspace/.build/out -index-system-modules
error: Build failed
BUILD FAILURE 6.4 wasm