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Build Information

Failed to build MCP, reference master (ff6b02), with Swift 6.3 for Wasm on 23 Oct 2026 19:29:35 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-6.3-latest swift build --swift-sdk swift-6.3.2-RELEASE_wasm 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 5.1.3
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/tannerdsilva/swift-mcp.git
Reference: master
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/tannerdsilva/swift-mcp
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at ff6b02e fix(client): the shutdown ladder follows the child's placement
Cloned https://github.com/tannerdsilva/swift-mcp.git
Revision (git rev-parse @):
ff6b02e2f44071a72352e7664033f2b2183fef8f
SUCCESS checkout https://github.com/tannerdsilva/swift-mcp.git at master
========================================
Build
========================================
Selected platform:         wasm
Swift version:             6.3
Building package at path:  $PWD
https://github.com/tannerdsilva/swift-mcp.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-54344843-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:wasm-6.3-latest swift build --swift-sdk swift-6.3.2-RELEASE_wasm 2>&1
wasm-6.3-latest: Pulling from saguaro1/spi-images
Digest: sha256:eea66feda95ad8894091082dbcb77ec1fc917891d37888fd1938b0b68455d992
Status: Image is up to date for registry.gitlab.com/saguaro1/spi-images:wasm-6.3-latest
Fetching https://github.com/swiftlang/swift-syntax.git
Fetching https://github.com/tannerdsilva/SwiftSlash.git
Fetching https://github.com/apple/swift-argument-parser.git
Fetching https://github.com/tannerdsilva/QuickJSON.git
Fetching https://github.com/apple/swift-docc-plugin.git
Fetching https://github.com/swift-server/swift-service-lifecycle.git
[1/2345] Fetching swift-docc-plugin
[2346/21616] Fetching swift-docc-plugin, swift-argument-parser
[21617/25894] Fetching swift-docc-plugin, swift-argument-parser, swiftslash
[22345/26428] Fetching swift-docc-plugin, swift-argument-parser, swiftslash, quickjson
[26429/29308] Fetching swift-docc-plugin, swift-argument-parser, swiftslash, quickjson, swift-service-lifecycle
Fetched https://github.com/tannerdsilva/QuickJSON.git from cache (8.42s)
Fetched https://github.com/tannerdsilva/SwiftSlash.git from cache (8.42s)
Fetched https://github.com/swift-server/swift-service-lifecycle.git from cache (8.42s)
Fetched https://github.com/apple/swift-docc-plugin.git from cache (8.43s)
Fetching https://github.com/apple/swift-nio.git
Fetching https://github.com/apple/swift-log.git
Fetched https://github.com/apple/swift-argument-parser.git from cache (8.43s)
[1/8373] Fetching swift-log
Fetched https://github.com/apple/swift-log.git from cache (0.52s)
[1/86643] Fetching swift-nio
[18197/167699] Fetching swift-nio, swift-syntax
Fetched https://github.com/apple/swift-nio.git from cache (3.26s)
[20264/81056] Fetching swift-syntax
Fetched https://github.com/swiftlang/swift-syntax.git from cache (16.03s)
Computing version for https://github.com/tannerdsilva/SwiftSlash.git
Computed https://github.com/tannerdsilva/SwiftSlash.git at 6.0.0 (16.21s)
Computing version for https://github.com/tannerdsilva/QuickJSON.git
Computed https://github.com/tannerdsilva/QuickJSON.git at 2.0.3 (0.14s)
Fetching https://github.com/ibireme/yyjson.git
[1/5194] Fetching yyjson
Fetched https://github.com/ibireme/yyjson.git from cache (0.88s)
Computing version for https://github.com/swiftlang/swift-syntax.git
Computed https://github.com/swiftlang/swift-syntax.git at 603.0.2 (1.86s)
Computing version for https://github.com/ibireme/yyjson.git
Computed https://github.com/ibireme/yyjson.git at 0.12.0 (0.17s)
Computing version for https://github.com/apple/swift-argument-parser.git
Computed https://github.com/apple/swift-argument-parser.git at 1.8.2 (0.16s)
Computing version for https://github.com/apple/swift-docc-plugin.git
Computed https://github.com/apple/swift-docc-plugin.git at 1.5.0 (0.17s)
Fetching https://github.com/swiftlang/swift-docc-symbolkit
[1/3847] Fetching swift-docc-symbolkit
Fetched https://github.com/swiftlang/swift-docc-symbolkit from cache (2.13s)
Computing version for https://github.com/swiftlang/swift-docc-symbolkit
Computed https://github.com/swiftlang/swift-docc-symbolkit at 1.0.0 (2.34s)
Computing version for https://github.com/swift-server/swift-service-lifecycle.git
Computed https://github.com/swift-server/swift-service-lifecycle.git at 2.13.0 (0.15s)
Fetching https://github.com/apple/swift-async-algorithms.git
[1/6821] Fetching swift-async-algorithms
Fetched https://github.com/apple/swift-async-algorithms.git from cache (0.55s)
Computing version for https://github.com/apple/swift-async-algorithms.git
Computed https://github.com/apple/swift-async-algorithms.git at 1.1.7 (0.75s)
Fetching https://github.com/apple/swift-collections.git
[1/29301] Fetching swift-collections
Fetched https://github.com/apple/swift-collections.git from cache (1.30s)
Computing version for https://github.com/apple/swift-collections.git
Computed https://github.com/apple/swift-collections.git at 1.7.4 (1.54s)
Computing version for https://github.com/apple/swift-log.git
Computed https://github.com/apple/swift-log.git at 1.16.2 (0.15s)
Computing version for https://github.com/apple/swift-nio.git
Computed https://github.com/apple/swift-nio.git at 2.104.0 (0.27s)
Fetching https://github.com/apple/swift-atomics.git
Fetching https://github.com/apple/swift-system.git
[1/1889] Fetching swift-atomics
Fetched https://github.com/apple/swift-atomics.git from cache (0.47s)
[1/7373] Fetching swift-system
Fetched https://github.com/apple/swift-system.git from cache (0.90s)
Computing version for https://github.com/apple/swift-atomics.git
Computed https://github.com/apple/swift-atomics.git at 1.3.1 (1.06s)
Computing version for https://github.com/apple/swift-system.git
Computed https://github.com/apple/swift-system.git at 1.8.1 (0.18s)
Creating working copy for https://github.com/apple/swift-nio.git
Working copy of https://github.com/apple/swift-nio.git resolved at 2.104.0
Creating working copy for https://github.com/swiftlang/swift-syntax.git
Working copy of https://github.com/swiftlang/swift-syntax.git resolved at 603.0.2
Creating working copy for https://github.com/apple/swift-argument-parser.git
Working copy of https://github.com/apple/swift-argument-parser.git resolved at 1.8.2
Creating working copy for https://github.com/apple/swift-collections.git
Working copy of https://github.com/apple/swift-collections.git resolved at 1.7.4
Creating working copy for https://github.com/swift-server/swift-service-lifecycle.git
Working copy of https://github.com/swift-server/swift-service-lifecycle.git resolved at 2.13.0
Creating working copy for https://github.com/tannerdsilva/QuickJSON.git
Working copy of https://github.com/tannerdsilva/QuickJSON.git resolved at 2.0.3
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-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-log.git
Working copy of https://github.com/apple/swift-log.git resolved at 1.16.2
Creating working copy for https://github.com/ibireme/yyjson.git
Working copy of https://github.com/ibireme/yyjson.git resolved at 0.12.0
Creating working copy for https://github.com/apple/swift-async-algorithms.git
Working copy of https://github.com/apple/swift-async-algorithms.git resolved at 1.1.7
Creating working copy for https://github.com/tannerdsilva/SwiftSlash.git
Working copy of https://github.com/tannerdsilva/SwiftSlash.git resolved at 6.0.0
Creating working copy for https://github.com/apple/swift-docc-plugin.git
Working copy of https://github.com/apple/swift-docc-plugin.git resolved at 1.5.0
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
Downloading package prebuilt https://download.swift.org/prebuilts/swift-syntax/603.0.2/swift-6.3.2-RELEASE-ubuntu_noble_x86_64-MacroSupport.tar.gz
Downloaded https://download.swift.org/prebuilts/swift-syntax/603.0.2/swift-6.3.2-RELEASE-ubuntu_noble_x86_64-MacroSupport.tar.gz (0.19s)
[1/1] Compiling plugin GenerateManual
[2/2] Compiling plugin GenerateDoccReference
[3/3] Compiling plugin Swift-DocC Preview
[4/4] Compiling plugin Swift-DocC
Building for debugging...
[4/198] Write sources
[13/198] Compiling _AtomicsShims.c
[13/198] Compiling __cswiftslash_threads __cswiftslash_threads.c
[15/198] Write sources
[21/198] Compiling __cswiftslash_eventtrigger __cswiftslash_eventtrigger.c
[22/198] Compiling _SwiftSyntaxCShims PlatformMutex.c
[23/198] Write sources
[55/198] Compiling CNIOWindows WSAStartup.c
[56/198] Compiling CNIOWASI CNIOWASI.c
[57/198] Compiling CNIOWindows shim.c
[58/198] Compiling __cswiftslash_posix_helpers __cswiftslash_posix_helpers.c
[59/198] Compiling CNIOPosix event_loop_id.c
[60/198] Compiling CNIOOpenBSD shim.c
[61/198] Compiling CNIOLinux liburing_shims.c
[62/198] Compiling CNIOLLHTTP c_nio_http.c
[63/198] Compiling CNIOFreeBSD shim.c
[64/198] Compiling CNIODarwin shim.c
[65/198] Write sources
[67/198] Compiling CNIOLLHTTP c_nio_api.c
[68/198] Compiling __cswiftslash_types __cswiftslash_types.c
[69/198] Compiling CNIOLinux shim.c
[70/198] Compiling __cswiftslash_threads __cswiftslash_threads.c
In file included from /host/spi-builder-workspace/.build/checkouts/SwiftSlash/Sources/__cswiftslash_eventtrigger/__cswiftslash_eventtrigger.c:16:
/host/spi-builder-workspace/.build/checkouts/SwiftSlash/Sources/__cswiftslash_eventtrigger/__cswiftslash_eventtrigger.h:16:10: fatal error: 'sys/wait.h' file not found
   16 | #include <sys/wait.h>
      |          ^~~~~~~~~~~~
1 error generated.
[71/198] Compiling __cswiftslash_eventtrigger __cswiftslash_eventtrigger.c
In file included from /host/spi-builder-workspace/.build/checkouts/SwiftSlash/Sources/__cswiftslash_posix_helpers/__cswiftslash_posix_helpers.c:16:
In file included from /host/spi-builder-workspace/.build/checkouts/SwiftSlash/Sources/__cswiftslash_posix_helpers/__cswiftslash_posix_helpers.h:27:
/root/.swiftpm/swift-sdks/swift-6.3.2-RELEASE_wasm.artifactbundle/swift-6.3.2-RELEASE_wasm/wasm32-unknown-wasip1/WASI.sdk/include/wasm32-wasip1/signal.h:2:2: error: "wasm lacks signal support; to enable minimal signal emulation, compile with -D_WASI_EMULATED_SIGNAL and link with -lwasi-emulated-signal"
    2 | #error "wasm lacks signal support; to enable minimal signal emulation, \
      |  ^
/host/spi-builder-workspace/.build/checkouts/SwiftSlash/Sources/__cswiftslash_posix_helpers/__cswiftslash_posix_helpers.c:19:10: fatal error: 'spawn.h' file not found
   19 | #include <spawn.h>
      |          ^~~~~~~~~
[71/198] Compiling __cswiftslash_posix_helpers __cswiftslash_posix_helpers.c
[71/198] Compiling yyjson.c
[71/198] Compiling c-atomics.c
[71/198] Compiling yyjson.c
[71/198] Compiling CNIOLLHTTP c_nio_llhttp.c
[71/198] Compiling c-nioatomics.c
[71/198] Write swift-version-24593BA9C3E375BF.txt
BUILD FAILURE 6.3 wasm