Swift Package IndexBuild Information
Failed to build AsyncProcess, reference 0.0.5 (3a506b), with Swift 6.3 for Wasm on 15 Apr 2026 20:30:51 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-4609320-3":/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
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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/gregcotten/AsyncProcess.git
Reference: 0.0.5
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/gregcotten/AsyncProcess
* tag 0.0.5 -> FETCH_HEAD
HEAD is now at 3a506bb don't explicitly unwrap pid for interrupt/terminate
Cloned https://github.com/gregcotten/AsyncProcess.git
Revision (git rev-parse @):
3a506bb36e4aa54eb3f1b13f15e636c68ee3eb19
SUCCESS checkout https://github.com/gregcotten/AsyncProcess.git at 0.0.5
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Build
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Selected platform: wasm
Swift version: 6.3
Building package at path: $PWD
https://github.com/gregcotten/AsyncProcess.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-3":/host -w "$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-system
Fetching https://github.com/apple/swift-atomics.git
Fetching https://github.com/apple/swift-nio.git
Fetching https://github.com/apple/swift-log.git
Fetching https://github.com/apple/swift-async-algorithms.git
[1/5601] Fetching swift-system
[450/7421] Fetching swift-system, swift-atomics
[469/30958] Fetching swift-system, swift-atomics, swift-collections
[2557/37541] Fetching swift-system, swift-atomics, swift-collections, swift-log
[5060/43782] Fetching swift-system, swift-atomics, swift-collections, swift-log, swift-async-algorithms
[21894/126937] Fetching swift-system, swift-atomics, swift-collections, swift-log, swift-async-algorithms, swift-nio
Fetched https://github.com/apple/swift-async-algorithms.git from cache (1.61s)
Fetched https://github.com/apple/swift-log.git from cache (1.67s)
[12631/114113] Fetching swift-system, swift-atomics, swift-collections, swift-nio
Fetched https://github.com/apple/swift-atomics.git from cache (3.06s)
Fetched https://github.com/apple/swift-system from cache (3.07s)
Fetched https://github.com/apple/swift-collections.git from cache (3.11s)
[36256/83155] Fetching swift-nio
Fetched https://github.com/apple/swift-nio.git from cache (7.27s)
Computing version for https://github.com/apple/swift-atomics.git
Computed https://github.com/apple/swift-atomics.git at 1.3.0 (8.76s)
Computing version for https://github.com/apple/swift-async-algorithms.git
Computed https://github.com/apple/swift-async-algorithms.git at 1.1.3 (1.50s)
Computing version for https://github.com/apple/swift-collections.git
Computed https://github.com/apple/swift-collections.git at 1.4.1 (1.33s)
Computing version for https://github.com/apple/swift-system
Computed https://github.com/apple/swift-system at 1.6.4 (0.81s)
Computing version for https://github.com/apple/swift-log.git
Computed https://github.com/apple/swift-log.git at 1.12.0 (0.69s)
Computing version for https://github.com/apple/swift-nio.git
Computed https://github.com/apple/swift-nio.git at 2.97.1 (1.10s)
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-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-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-log.git
Working copy of https://github.com/apple/swift-log.git resolved at 1.12.0
Creating working copy for https://github.com/apple/swift-system
Working copy of https://github.com/apple/swift-system resolved at 1.6.4
Creating working copy for https://github.com/apple/swift-nio.git
Working copy of https://github.com/apple/swift-nio.git resolved at 2.97.1
Building for debugging...
[0/31] Write sources
[14/31] Compiling _AtomicsShims.c
In file included from /host/spi-builder-workspace/Sources/CProcessSpawnSync/spawner.c:16:
/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, \
| ^
In file included from /host/spi-builder-workspace/Sources/CProcessSpawnSync/spawner.c:26:
In file included from /host/spi-builder-workspace/Sources/CProcessSpawnSync/internal-helpers.h:15:
/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, \
| ^
In file included from /host/spi-builder-workspace/Sources/CProcessSpawnSync/spawner.c:26:
/host/spi-builder-workspace/Sources/CProcessSpawnSync/internal-helpers.h:70:72: error: unknown type name 'sigset_t'
70 | static int block_everything_but_something_went_seriously_wrong_signals(sigset_t *old_mask) {
| ^
/host/spi-builder-workspace/Sources/CProcessSpawnSync/internal-helpers.h:71:5: error: use of undeclared identifier 'sigset_t'
71 | sigset_t mask;
| ^~~~~~~~
/host/spi-builder-workspace/Sources/CProcessSpawnSync/internal-helpers.h:73:10: error: call to undeclared function 'sigfillset'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
73 | r |= sigfillset(&mask);
| ^
/host/spi-builder-workspace/Sources/CProcessSpawnSync/internal-helpers.h:73:22: error: use of undeclared identifier 'mask'
73 | r |= sigfillset(&mask);
| ^~~~
/host/spi-builder-workspace/Sources/CProcessSpawnSync/internal-helpers.h:74:10: error: call to undeclared function 'sigdelset'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
74 | r |= sigdelset(&mask, SIGABRT);
| ^
/host/spi-builder-workspace/Sources/CProcessSpawnSync/internal-helpers.h:74:21: error: use of undeclared identifier 'mask'
74 | r |= sigdelset(&mask, SIGABRT);
| ^~~~
/host/spi-builder-workspace/Sources/CProcessSpawnSync/internal-helpers.h:74:27: error: use of undeclared identifier 'SIGABRT'
74 | r |= sigdelset(&mask, SIGABRT);
| ^~~~~~~
/host/spi-builder-workspace/Sources/CProcessSpawnSync/internal-helpers.h:75:21: error: use of undeclared identifier 'mask'
75 | r |= sigdelset(&mask, SIGBUS);
| ^~~~
/host/spi-builder-workspace/Sources/CProcessSpawnSync/internal-helpers.h:75:27: error: use of undeclared identifier 'SIGBUS'
75 | r |= sigdelset(&mask, SIGBUS);
| ^~~~~~
/host/spi-builder-workspace/Sources/CProcessSpawnSync/internal-helpers.h:76:21: error: use of undeclared identifier 'mask'
76 | r |= sigdelset(&mask, SIGFPE);
| ^~~~
/host/spi-builder-workspace/Sources/CProcessSpawnSync/internal-helpers.h:76:27: error: use of undeclared identifier 'SIGFPE'
76 | r |= sigdelset(&mask, SIGFPE);
| ^~~~~~
/host/spi-builder-workspace/Sources/CProcessSpawnSync/internal-helpers.h:77:21: error: use of undeclared identifier 'mask'
77 | r |= sigdelset(&mask, SIGILL);
| ^~~~
/host/spi-builder-workspace/Sources/CProcessSpawnSync/internal-helpers.h:77:27: error: use of undeclared identifier 'SIGILL'
77 | r |= sigdelset(&mask, SIGILL);
| ^~~~~~
/host/spi-builder-workspace/Sources/CProcessSpawnSync/internal-helpers.h:78:21: error: use of undeclared identifier 'mask'
78 | r |= sigdelset(&mask, SIGKILL);
| ^~~~
/host/spi-builder-workspace/Sources/CProcessSpawnSync/internal-helpers.h:78:27: error: use of undeclared identifier 'SIGKILL'
78 | r |= sigdelset(&mask, SIGKILL);
| ^~~~~~~
/host/spi-builder-workspace/Sources/CProcessSpawnSync/internal-helpers.h:79:21: error: use of undeclared identifier 'mask'
79 | r |= sigdelset(&mask, SIGSEGV);
| ^~~~
/host/spi-builder-workspace/Sources/CProcessSpawnSync/internal-helpers.h:79:27: error: use of undeclared identifier 'SIGSEGV'
79 | r |= sigdelset(&mask, SIGSEGV);
| ^~~~~~~
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
[15/31] Compiling CProcessSpawnSync spawner.c
[15/31] Compiling CNIOOpenBSD shim.c
[15/31] Compiling CNIOPosix event_loop_id.c
[15/31] Compiling CSystem shims.c
[15/31] Compiling CNIOWindows WSAStartup.c
[15/31] Compiling CNIOWindows shim.c
[15/31] Compiling CNIOWASI CNIOWASI.c
[15/31] Write swift-version-24593BA9C3E375BF.txt
BUILD FAILURE 6.3 wasm