Swift Package IndexBuild Information
Failed to build swift-tools-support-async, reference 0.20.0 (b2538c), with Swift 6.2 for Wasm on 25 Sep 2026 12:47:46 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-6.2-latest swift build --swift-sdk swift-6.2-RELEASE_wasm 2>&1Build Log
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RunAll
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Builder version: 5.1.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/apple/swift-tools-support-async.git
Reference: 0.20.0
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/apple/swift-tools-support-async
* tag 0.20.0 -> FETCH_HEAD
HEAD is now at b2538c3 Update CI config
Submodule path 'ThirdParty/BLAKE3': checked out '2f6f56f3477321c9e4742f1c863e45f2cfcbfb5e'
Submodule 'ThirdParty/BLAKE3' (https://github.com/BLAKE3-team/BLAKE3.git) registered for path 'ThirdParty/BLAKE3'
Cloning into '/host/spi-builder-workspace/ThirdParty/BLAKE3'...
Cloned https://github.com/apple/swift-tools-support-async.git
Revision (git rev-parse @):
b2538c3737abe16b4c2cc3ab678851366d8bbcdf
SUCCESS checkout https://github.com/apple/swift-tools-support-async.git at 0.20.0
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Build
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Selected platform: wasm
Swift version: 6.2
Building package at path: $PWD
https://github.com/apple/swift-tools-support-async.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-53886770-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:wasm-6.2-latest swift build --swift-sdk swift-6.2-RELEASE_wasm 2>&1
wasm-6.2-latest: Pulling from saguaro1/spi-images
Digest: sha256:ff44196b45f83e5a0a99a627b185f548850d9bc1242e3dee2178fb1570812fe8
Status: Image is up to date for registry.gitlab.com/saguaro1/spi-images:wasm-6.2-latest
Fetching https://github.com/apple/swift-log.git
Fetching https://github.com/apple/swift-protobuf.git
Fetching https://github.com/apple/swift-collections.git
Fetching https://github.com/apple/swift-nio.git
Fetching https://github.com/swiftlang/swift-tools-support-core.git
Fetching https://github.com/apple/swift-system.git
[1/8165] Fetching swift-log
[8166/15117] Fetching swift-log, swift-system
[9209/22520] Fetching swift-log, swift-system, swift-tools-support-core
[22521/50243] Fetching swift-log, swift-system, swift-tools-support-core, swift-collections
[39987/136343] Fetching swift-log, swift-system, swift-tools-support-core, swift-collections, swift-nio
[48728/190629] Fetching swift-log, swift-system, swift-tools-support-core, swift-collections, swift-nio, swift-protobuf
Fetched https://github.com/apple/swift-system.git from cache (1.28s)
Fetched https://github.com/swiftlang/swift-tools-support-core.git from cache (1.28s)
Fetching https://github.com/apple/swift-atomics.git
Fetching https://github.com/apple/swift-async-algorithms.git
Fetched https://github.com/apple/swift-log.git from cache (1.28s)
[70175/168109] Fetching swift-collections, swift-nio, swift-protobuf
Fetched https://github.com/apple/swift-collections.git from cache (1.29s)
[44717/140386] Fetching swift-nio, swift-protobuf
[84026/142267] Fetching swift-nio, swift-protobuf, swift-atomics
[91204/148999] Fetching swift-nio, swift-protobuf, swift-atomics, swift-async-algorithms
Fetched https://github.com/apple/swift-atomics.git from cache (0.66s)
Fetched https://github.com/apple/swift-async-algorithms.git from cache (0.67s)
[100048/140386] Fetching swift-nio, swift-protobuf
Fetched https://github.com/apple/swift-nio.git from cache (5.50s)
Fetched https://github.com/apple/swift-protobuf.git from cache (5.51s)
Computing version for https://github.com/apple/swift-atomics.git
Computed https://github.com/apple/swift-atomics.git at 1.3.1 (5.71s)
Computing version for https://github.com/swiftlang/swift-tools-support-core.git
Computed https://github.com/swiftlang/swift-tools-support-core.git at 0.8.0 (0.26s)
Computing version for https://github.com/apple/swift-async-algorithms.git
Computed https://github.com/apple/swift-async-algorithms.git at 1.1.6 (0.22s)
Computing version for https://github.com/apple/swift-collections.git
Computed https://github.com/apple/swift-collections.git at 1.7.0 (0.24s)
Computing version for https://github.com/apple/swift-protobuf.git
Computed https://github.com/apple/swift-protobuf.git at 1.38.1 (0.18s)
Computing version for https://github.com/apple/swift-system.git
Computed https://github.com/apple/swift-system.git at 1.8.1 (0.18s)
Computing version for https://github.com/apple/swift-log.git
Computed https://github.com/apple/swift-log.git at 1.15.1 (0.15s)
Computing version for https://github.com/apple/swift-nio.git
Computed https://github.com/apple/swift-nio.git at 2.103.0 (0.34s)
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/apple/swift-protobuf.git
Working copy of https://github.com/apple/swift-protobuf.git resolved at 1.38.1
Creating working copy for https://github.com/swiftlang/swift-tools-support-core.git
Working copy of https://github.com/swiftlang/swift-tools-support-core.git resolved at 0.8.0
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-system.git
Working copy of https://github.com/apple/swift-system.git resolved at 1.8.1
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-async-algorithms.git
Working copy of https://github.com/apple/swift-async-algorithms.git resolved at 1.1.6
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
[1/1] Compiling plugin SwiftProtobufPlugin
Building for debugging...
[1/51] Write sources
[11/51] Compiling CBLAKE3 blake3_avx512.c
[12/51] Write sources
[28/51] Compiling _AtomicsShims.c
[28/51] Compiling CBLAKE3 blake3_sse41.c
In file included from /host/spi-builder-workspace/.build/checkouts/swift-tools-support-core/Sources/TSCclibc/process.c:15:
/host/spi-builder-workspace/.build/checkouts/swift-tools-support-core/Sources/TSCclibc/include/process.h:3:10: fatal error: 'spawn.h' file not found
3 | #include <spawn.h>
| ^~~~~~~~~
1 error generated.
[30/51] Compiling TSCclibc process.c
[30/51] Compiling CNIOWindows WSAStartup.c
[30/51] Compiling TSCclibc strerror.c
[30/51] Compiling CSystem shims.c
[30/51] Compiling CNIOWindows shim.c
[30/51] Compiling TSCclibc libc.c
In file included from /host/spi-builder-workspace/Sources/CProcessSpawnSync/spawner.c:18:
/root/.swiftpm/swift-sdks/swift-6.2-RELEASE_wasm.artifactbundle/swift-6.2-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, \
| ^
[30/51] Compiling TSFCProcessSpawnSync spawner.c
[30/51] Write swift-version-24593BA9C3E375BF.txt
BUILD FAILURE 6.2 wasm