Swift Package Index

Build Information

Failed to build SwiftSlash, reference master (f3cd09), with Swift 6.3 for Wasm on 17 Apr 2026 21:20:16 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/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

Build Log

========================================
RunAll
========================================
Builder version: 4.70.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/tannerdsilva/SwiftSlash.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/SwiftSlash
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at f3cd096 Fix build errors with Swift 6.2 (#24)
Cloned https://github.com/tannerdsilva/SwiftSlash.git
Revision (git rev-parse @):
f3cd09604ab2f8ef78fee66d58022af52827ffa1
SUCCESS checkout https://github.com/tannerdsilva/SwiftSlash.git at master
========================================
Build
========================================
Selected platform:         wasm
Swift version:             6.3
Building package at path:  $PWD
https://github.com/tannerdsilva/SwiftSlash.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$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
Building for debugging...
[0/16] Compiling __cswiftslash_types __cswiftslash_types.c
[1/16] Write sources
In file included from /host/spi-builder-workspace/Sources/__cswiftslash_posix_helpers/__cswiftslash_posix_helpers.c:12:
In file included from /host/spi-builder-workspace/Sources/__cswiftslash_posix_helpers/__cswiftslash_posix_helpers.h:25:
/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/__cswiftslash_posix_helpers/__cswiftslash_posix_helpers.c:17:9: error: call to undeclared function 'fork'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   17 |         return fork();
      |                ^
/host/spi-builder-workspace/Sources/__cswiftslash_posix_helpers/__cswiftslash_posix_helpers.c:36:9: error: call to undeclared function 'execvp'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
   36 |         return execvp(file, argv);
      |                ^
3 errors generated.
[4/16] Compiling __cswiftslash_posix_helpers __cswiftslash_posix_helpers.c
[4/16] Write sources
[4/16] Compiling __cswiftslash_future __cswiftslash_future.c
[4/16] Compiling __cswiftslash_fifo __cswiftslash_fifo.c
In file included from [4/16] Compiling __cswiftslash_eventtrigger __cswiftslash_eventtrigger.c
[4/16] Compiling __cswiftslash_identified_list __cswiftslash_identified_list.c
In file included from /host/spi-builder-workspace/Sources/__cswiftslash_threads/__cswiftslash_threads.c:12:
/host/spi-builder-workspace/Sources/__cswiftslash_threads/__cswiftslash_threads.h:68:1: warning: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Wnullability-completeness]
   68 | __cswiftsla[4/16] Compiling __cswiftslash_threads __cswiftslash_threads.c
[4/16] Write swift-version-24593BA9C3E375BF.txt
BUILD FAILURE 6.3 wasm