mcp-swift-sdk – Build Information

Build Information

Failed to build mcp-swift-sdk, reference 0.12.1 (a0ae21), with Swift 6.4 for Wasm on 25 Sep 2026 02:30:47 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-54344843-1":/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/modelcontextprotocol/swift-sdk.git
Reference: 0.12.1
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/modelcontextprotocol/swift-sdk
 * tag               0.12.1     -> FETCH_HEAD
HEAD is now at a0ae212 Improvements and fixes (#223)
Cloned https://github.com/modelcontextprotocol/swift-sdk.git
Revision (git rev-parse @):
a0ae212ebf6eab5f754c3129608bc5557637e605
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/modelcontextprotocol/swift-sdk.git at 0.12.1
========================================
Build
========================================
Selected platform:         wasm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/modelcontextprotocol/swift-sdk.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-54344843-1":/host -w "$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/swiftlang/swift-docc-plugin
[1/2345] Fetching swift-docc-plugin
Fetched https://github.com/swiftlang/swift-docc-plugin (0.58s)
Fetching https://github.com/mattt/eventsource.git
Fetching https://github.com/apple/swift-log.git
Fetching https://github.com/apple/swift-system.git
Fetching https://github.com/apple/swift-nio.git
Fetching https://github.com/swiftlang/swift-docc-symbolkit
[1/8165] Fetching swift-log
[8166/8468] Fetching swift-log, eventsource
[8469/15420] Fetching swift-log, eventsource, swift-system
[8748/19249] Fetching swift-log, eventsource, swift-system, swift-docc-symbolkit
Fetched https://github.com/swiftlang/swift-docc-symbolkit (0.61s)
[15420/15420] Fetching swift-log, eventsource, swift-system
Fetched https://github.com/apple/swift-system.git (0.66s)
Fetched https://github.com/apple/swift-log.git (0.66s)
[1/86091] Fetching swift-nio
Fetched https://github.com/mattt/eventsource.git (3.13s)
Fetched https://github.com/apple/swift-nio.git (3.17s)
Computing version for https://github.com/swiftlang/swift-docc-symbolkit
Computed https://github.com/swiftlang/swift-docc-symbolkit at 1.0.0 (3.39s)
Computing version for https://github.com/mattt/eventsource.git
Computed https://github.com/mattt/eventsource.git at 1.5.1 (0.16s)
Computing version for https://github.com/apple/swift-log.git
Computed https://github.com/apple/swift-log.git at 1.15.1 (0.19s)
Computing version for https://github.com/apple/swift-system.git
Computed https://github.com/apple/swift-system.git at 1.8.1 (0.21s)
Computing version for https://github.com/apple/swift-nio.git
Computed https://github.com/apple/swift-nio.git at 2.103.0 (0.33s)
Fetching https://github.com/apple/swift-atomics.git
Fetching https://github.com/apple/swift-collections.git
[1/1881] Fetching swift-atomics
Fetched https://github.com/apple/swift-atomics.git (0.57s)
[1/27702] Fetching swift-collections
Fetched https://github.com/apple/swift-collections.git (1.26s)
Computing version for https://github.com/apple/swift-atomics.git
Computed https://github.com/apple/swift-atomics.git at 1.3.1 (1.43s)
Computing version for https://github.com/apple/swift-collections.git
Computed https://github.com/apple/swift-collections.git at 1.7.0 (0.29s)
Creating working copy for https://github.com/swiftlang/swift-docc-symbolkit
Working copy of https://github.com/swiftlang/swift-docc-symbolkit resolved at 1.0.0
Creating working copy for https://github.com/apple/swift-collections.git
Working copy of https://github.com/apple/swift-collections.git resolved at 1.7.0
Creating working copy for https://github.com/apple/swift-log.git
Working copy of https://github.com/apple/swift-log.git resolved at 1.15.1
Creating working copy for https://github.com/swiftlang/swift-docc-plugin
Working copy of https://github.com/swiftlang/swift-docc-plugin resolved at main (647c708)
Creating working copy for https://github.com/apple/swift-atomics.git
Working copy of https://github.com/apple/swift-atomics.git resolved at 1.3.1
Creating working copy for https://github.com/apple/swift-nio.git
Working copy of https://github.com/apple/swift-nio.git resolved at 2.103.0
Creating working copy for https://github.com/apple/swift-system.git
Working copy of https://github.com/apple/swift-system.git resolved at 1.8.1
Creating working copy for https://github.com/mattt/eventsource.git
Working copy of https://github.com/mattt/eventsource.git resolved at 1.5.1
Building for debugging...
[Computing dependencies]
[Pre-planning 1 / 838]
[Planning deferred tasks]
[125 / 255]
[134 / 277] Logging
[136 / 295] SystemPackage
[137 / 295] _NIOBase64
[160 / 295] SystemPackage
[160 / 295] InternalCollectionsUtilities
[171 / 295] _NIODataStructures
[174 / 296] _NIOBase64
[178 / 296] _NIOBase64
[181 / 296] NIOConcurrencyHelpers
[182 / 296] NIOConcurrencyHelpers
[184 / 297] NIOConcurrencyHelpers
[186 / 297] SystemPackage
[192 / 297] Logging
[194 / 298] Logging
[198 / 298] SystemPackage
[200 / 298] SpanPreview
[201 / 298] SpanPreview
[203 / 298] InternalCollectionsUtilities
[204 / 298] InternalCollectionsUtilities
[209 / 303] CNIOWindows
[214 / 304] SpanPreview
[229 / 307] InternalCollectionsUtilities
[239 / 317] CNIOOpenBSD
[244 / 326] InternalCollectionsUtilities
[246 / 326] MCP
[247 / 327] MCP
[250 / 327] MCP
error: SwiftCompile normal wasm32 failed with a nonzero exit code. Command line:     cd /host

/host/spi-builder-workspace/Sources/MCP/Base/Transports/HTTPClientTransport.swift:5:12: [1;31merror: [1;39mno such module 'EventSource'[0;0m
  [0;36m3 |[0;0m
  [0;36m4 |[0;0m #if !os(Linux)
  [0;36m5 |[0;0m     import EventSource
    [0;36m|[0;0m            `- [1;31merror: [1;39mno such module 'EventSource'[0;0m
  [0;36m6 |[0;0m #endif
  [0;36m7 |[0;0m
Failed frontend command:
/usr/bin/swift-frontend -frontend -emit-module -experimental-skip-non-inlinable-function-bodies-without-types /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthAuthorizationCodeFlow.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthAuthorizer.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthClientRegistrar.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthConfiguration.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthConstants.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthDiscovery.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthDiscoveryClient.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthErrors.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthModels.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthTokenEndpointClient.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthURLValidator.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/OAuthWWWAuthenticateParser.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/PKCE.swift /host/spi-builder-workspace/Sources/MCP/Base/Authorization/TokenStorage.swift /host/spi-builder-workspace/Sources/MCP/Base/Error.swift /host/spi-builder-workspace/Sources/MCP/Base/ID.swift /host/spi-builder-workspace/Sources/MCP/Base/Icon.swift /host/spi-builder-workspace/Sources/MCP/Base/Lifecycle.swift /host/spi-builder-workspace/Sources/MCP/Base/Messages.swift /host/spi-builder-workspace/Sources/MCP/Base/PendingRequest.swift /host/spi-builder-workspace/Sources/MCP/Base/Transport.swift /host/spi-builder-workspace/Sources/MCP/Base/Transports/HTTPClientTransport.swift /host/spi-builder-workspace/Sources/MCP/Base/Transports/HTTPServer/HTTPRequestValidation.swift /host/spi-builder-workspace/Sources/MCP/Base/Transports/HTTPServer/HTTPServerTypes.swift /host/spi-builder-workspace/Sources/MCP/Base/Transports/HTTPServer/StatefulHTTPServerTransport.swift /host/spi-builder-workspace/Sources/MCP/Base/Transports/HTTPServer/StatelessHTTPServerTransport.swift /host/spi-builder-workspace/Sources/MCP/Base/Transports/InMemoryTransport.swift /host/spi-builder-workspace/Sources/MCP/Base/Transports/NetworkTransport.swift /host/spi-builder-workspace/Sources/MCP/Base/Transports/StdioTransport.swift /host/spi-builder-workspace/Sources/MCP/Base/UnitInterval.swift /host/spi-builder-workspace/Sources/MCP/Base/Utilities/Cancellation.swift /host/spi-builder-workspace/Sources/MCP/Base/Utilities/Ping.swift /host/spi-builder-workspace/Sources/MCP/Base/Utilities/Progress.swift /host/spi-builder-workspace/Sources/MCP/Base/Utilities/RequestContext.swift /host/spi-builder-workspace/Sources/MCP/Base/Value.swift /host/spi-builder-workspace/Sources/MCP/Base/Versioning.swift /host/spi-builder-workspace/Sources/MCP/Client/Client.swift /host/spi-builder-workspace/Sources/MCP/Client/Elicitation.swift /host/spi-builder-workspace/Sources/MCP/Client/Roots.swift /host/spi-builder-workspace/Sources/MCP/Client/Sampling.swift /host/spi-builder-workspace/Sources/MCP/Extensions/Data+Extensions.swift /host/spi-builder-workspace/Sources/MCP/Server/Completion.swift /host/spi-builder-workspace/Sources/MCP/Server/Logging.swift /host/spi-builder-workspace/Sources/MCP/Server/Prompts.swift /host/spi-builder-workspace/Sources/MCP/Server/Resources.swift /host/spi-builder-workspace/Sources/MCP/Server/Server.swift /host/spi-builder-workspace/Sources/MCP/Server/Tools.swift -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 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/mcp-swift-sdk.build/Debug-webassembly-wasm32/MCP-t.build/DerivedSources-normal/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-webassembly-wasm32/MCP-t.build/DerivedSources/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-webassembly-wasm32/MCP-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name MCP -package-name spi_builder_workspace -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-webassembly-wasm32/MCP-t.build/Objects-normal/wasm32/MCP_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 -emit-module-doc-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-webassembly-wasm32/MCP-t.build/Objects-normal/wasm32/Modules/MCP.swiftdoc -emit-module-source-info-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-webassembly-wasm32/MCP-t.build/Objects-normal/wasm32/Modules/MCP.swiftsourceinfo -emit-objc-header-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-webassembly-wasm32/MCP-t.build/Objects-normal/wasm32/MCP-Swift.h -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-webassembly-wasm32/MCP-t.build/Objects-normal/wasm32/MCP-primary-emit-module.dia -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-webassembly-wasm32/MCP-t.build/Objects-normal/wasm32/MCP-primary-emit-module.d -parse-as-library -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/mcp-swift-sdk.build/Debug-webassembly-wasm32/MCP-t.build/Objects-normal/wasm32/Modules/MCP.swiftmodule
error: Build failed
BUILD FAILURE 6.4 wasm