Swift Package IndexBuild Information
Failed to build swift-tools-support-async, reference main (c3d96f), with Swift 6.3 for Wasm on 19 Apr 2026 01:31:24 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.3-latest swift build --swift-sdk swift-6.3-RELEASE_wasm 2>&1Build Log
========================================
RunAll
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Builder version: 4.70.0
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: 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/apple/swift-tools-support-async
* branch main -> FETCH_HEAD
* [new branch] main -> origin/main
HEAD is now at c3d96f4 Merge pull request #64 from cwakamo/dev/update-TSC-dep
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 @):
c3d96f47848965cc7d247c656e8e5f27fe2f10c4
SUCCESS checkout https://github.com/apple/swift-tools-support-async.git at main
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Build
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Selected platform: wasm
Swift version: 6.3
Building package at path: $PWD
https://github.com/apple/swift-tools-support-async.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.3-latest swift build --swift-sdk swift-6.3-RELEASE_wasm 2>&1
wasm-6.3-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:d69f4e7582c319245442d62a08b2d7c7fd5a0c0c69f5d2ef11d1530cd8d3329b
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.3-latest
Fetching https://github.com/apple/swift-collections.git
Fetching https://github.com/apple/swift-protobuf.git
Fetching https://github.com/apple/swift-nio.git
Fetching https://github.com/apple/swift-atomics.git
Fetching https://github.com/swiftlang/swift-tools-support-core.git
Fetching https://github.com/apple/swift-system.git
[1/1820] Fetching swift-atomics
[129/25389] Fetching swift-atomics, swift-collections
[1547/30990] Fetching swift-atomics, swift-collections, swift-system
[4357/38178] Fetching swift-atomics, swift-collections, swift-system, swift-tools-support-core
[6229/85190] Fetching swift-atomics, swift-collections, swift-system, swift-tools-support-core, swift-protobuf
[15305/168362] Fetching swift-atomics, swift-collections, swift-system, swift-tools-support-core, swift-protobuf, swift-nio
Fetched https://github.com/apple/swift-system.git from cache (1.47s)
Fetching https://github.com/apple/swift-async-algorithms.git
[15613/162761] Fetching swift-atomics, swift-collections, swift-tools-support-core, swift-protobuf, swift-nio
[20936/169008] Fetching swift-atomics, swift-collections, swift-tools-support-core, swift-protobuf, swift-nio, swift-async-algorithms
Fetched https://github.com/apple/swift-async-algorithms.git from cache (1.25s)
[40450/162761] Fetching swift-atomics, swift-collections, swift-tools-support-core, swift-protobuf, swift-nio
Fetching https://github.com/apple/swift-log.git
[60837/169396] Fetching swift-atomics, swift-collections, swift-tools-support-core, swift-protobuf, swift-nio, swift-log
Fetched https://github.com/apple/swift-log.git from cache (1.26s)
[79646/162761] Fetching swift-atomics, swift-collections, swift-tools-support-core, swift-protobuf, swift-nio
Fetched https://github.com/apple/swift-nio.git from cache (18.95s)
Fetched https://github.com/apple/swift-atomics.git from cache (20.42s)
Fetched https://github.com/swiftlang/swift-tools-support-core.git from cache (20.42s)
Fetched https://github.com/apple/swift-collections.git from cache (20.52s)
Fetched https://github.com/apple/swift-protobuf.git from cache (20.59s)
Computing version for https://github.com/apple/swift-atomics.git
Computed https://github.com/apple/swift-atomics.git at 1.3.0 (21.42s)
Computing version for https://github.com/apple/swift-async-algorithms.git
Computed https://github.com/apple/swift-async-algorithms.git at 1.1.3 (0.99s)
Computing version for https://github.com/swiftlang/swift-tools-support-core.git
Computed https://github.com/swiftlang/swift-tools-support-core.git at 0.7.3 (1.04s)
Computing version for https://github.com/apple/swift-collections.git
Computed https://github.com/apple/swift-collections.git at 1.4.1 (1.20s)
Computing version for https://github.com/apple/swift-system.git
Computed https://github.com/apple/swift-system.git at 1.6.4 (1.49s)
Computing version for https://github.com/apple/swift-protobuf.git
Computed https://github.com/apple/swift-protobuf.git at 1.36.1 (0.92s)
Computing version for https://github.com/apple/swift-log.git
Computed https://github.com/apple/swift-log.git at 1.12.0 (0.92s)
Computing version for https://github.com/apple/swift-nio.git
Computed https://github.com/apple/swift-nio.git at 2.98.0 (1.15s)
Creating working copy for https://github.com/apple/swift-protobuf.git
Working copy of https://github.com/apple/swift-protobuf.git resolved at 1.36.1
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 1.1.3
Creating working copy for https://github.com/apple/swift-nio.git
Working copy of https://github.com/apple/swift-nio.git resolved at 2.98.0
Creating working copy for https://github.com/apple/swift-system.git
Working copy of https://github.com/apple/swift-system.git resolved at 1.6.4
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 0.7.3
Creating working copy for https://github.com/apple/swift-collections.git
Working copy of https://github.com/apple/swift-collections.git resolved at 1.4.1
Creating working copy for https://github.com/apple/swift-atomics.git
Working copy of https://github.com/apple/swift-atomics.git resolved at 1.3.0
Creating working copy for https://github.com/apple/swift-log.git
Working copy of https://github.com/apple/swift-log.git resolved at 1.12.0
[1/1] Compiling plugin SwiftProtobufPlugin
Building for debugging...
In file included from /host/spi-builder-workspace/Sources/CProcessSpawnSync/spawner.c:18:
/root/.swiftpm/swift-sdks/swift-6.3-RELEASE_wasm.artifactbundle/swift-6.3-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/Sources/CProcessSpawnSync/spawner.c:26:10: fatal error: 'sys/wait.h' file not found
26 | #include <sys/wait.h>
| ^~~~~~~~~~~~
2 errors generated.
[1/49] Compiling TSFCProcessSpawnSync spawner.c
[1/49] Write sources
[1/49] Write swift-version-24593BA9C3E375BF.txt
[1/49] Write sources
BUILD FAILURE 6.3 wasm