SessionKit – Build Information – Swift Package Index

Build Information

Failed to build SessionKit, reference v1.0.3 (f16d9b), with Swift 6.4 for Wasm on 16 Sep 2026 20:11:45 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-53886770-0":/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/Digipolitan/session-kit.git
Reference: v1.0.3
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/Digipolitan/session-kit
 * tag               v1.0.3     -> FETCH_HEAD
HEAD is now at f16d9bd Merge branch 'release/1.0.3'
Cloned https://github.com/Digipolitan/session-kit.git
Revision (git rev-parse @):
f16d9bd99344b0d0fe1c09851f35d2138708e4c2
SUCCESS checkout https://github.com/Digipolitan/session-kit.git at v1.0.3
========================================
Build
========================================
Selected platform:         wasm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/Digipolitan/session-kit.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-53886770-0":/host -w "$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] SessionKit
error: SwiftCompile normal wasm32 /host/spi-builder-workspace/Sources/SessionKit/Session.swift failed with a nonzero exit code. Command line:     cd /host
    builtin-SwiftPerFileCompile Session.swift
/host/spi-builder-workspace/Sources/SessionKit/Session.swift:80:52: [1;31merror: [1;39m'atomic' is unavailable: atomic writing is unavailable in WASI because temporary files are not supported[0;0m
[0;36m78 |[0;0m             return false
[0;36m79 |[0;0m         }
[0;36m80 |[0;0m         return (try? JSON.write(to: url, options: .[4;39matomic[0;0m)) != nil
   [0;36m|[0;0m                                                    `- [1;31merror: [1;39m'atomic' is unavailable: atomic writing is unavailable in WASI because temporary files are not supported[0;0m
[0;36m81 |[0;0m     }
[0;36m82 |[0;0m
FoundationEssentials.Data.WritingOptions.atomic:4:23: [1;39mnote: [1;39m'atomic' has been explicitly marked unavailable here[0;0m
[0;36m2 |[0;0m   struct WritingOptions {
[0;36m3 |[0;0m @available(*, unavailable, message: "atomic writing is unavailable in WASI because temporary files are not supported")
[0;36m4 |[0;0m     public static let atomic: Data.WritingOptions  }
  [0;36m|[0;0m                       `- [1;39mnote: [1;39m'atomic' has been explicitly marked unavailable here[0;0m
[0;36m5 |[0;0m }
[0;36m6 |[0;0m
Failed frontend command:
/usr/bin/swift-frontend -frontend -c -primary-file /host/spi-builder-workspace/Sources/SessionKit/Session.swift -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/SessionKit.build/Debug-webassembly-wasm32/SessionKit-t.build/Objects-normal/wasm32/Session.d -emit-const-values-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/SessionKit.build/Debug-webassembly-wasm32/SessionKit-t.build/Objects-normal/wasm32/Session.swiftconstvalues -emit-reference-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/SessionKit.build/Debug-webassembly-wasm32/SessionKit-t.build/Objects-normal/wasm32/Session.swiftdeps -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/SessionKit.build/Debug-webassembly-wasm32/SessionKit-t.build/Objects-normal/wasm32/Session.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 4 -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/SessionKit.build/Debug-webassembly-wasm32/SessionKit-t.build/DerivedSources-normal/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/SessionKit.build/Debug-webassembly-wasm32/SessionKit-t.build/DerivedSources/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/SessionKit.build/Debug-webassembly-wasm32/SessionKit-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name SessionKit -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/SessionKit.build/Debug-webassembly-wasm32/SessionKit-t.build/Objects-normal/wasm32/SessionKit_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/SessionKit.build/Debug-webassembly-wasm32/SessionKit-t.build/Objects-normal/wasm32/Session.o -index-unit-output-path /SessionKit.build/Debug-webassembly-wasm32/SessionKit-t.build/Objects-normal/wa[25 / 28] SessionKit
sm32/Session.o -index-store-path /host/spi-builder-workspace/.build/out -index-system-modules
error: Build failed
BUILD FAILURE 6.4 wasm