Swift Package Index

Build Information

Failed to build swift-signal, reference 1.0.0-alpha.1 (0b7d2f), with Swift 6.3 for Wasm on 21 Apr 2026 15:24:13 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/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/unixzii/swift-signal.git
Reference: 1.0.0-alpha.1
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/unixzii/swift-signal
 * tag               1.0.0-alpha.1 -> FETCH_HEAD
HEAD is now at 0b7d2f2 Fix typo
Cloned https://github.com/unixzii/swift-signal.git
Revision (git rev-parse @):
0b7d2f2378e1194741c633ff0c7a4948ca56f2ff
SUCCESS checkout https://github.com/unixzii/swift-signal.git at 1.0.0-alpha.1
========================================
Build
========================================
Selected platform:         wasm
Swift version:             6.3
Building package at path:  $PWD
https://github.com/unixzii/swift-signal.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/host -w "$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...
[0/3] Write sources
[2/3] Write swift-version-24593BA9C3E375BF.txt
[4/10] Compiling SwiftSignal Observer.swift
[5/10] Emitting module SwiftSignal
[6/10] Compiling SwiftSignal Computation.swift
[7/10] Compiling SwiftSignal Scope.swift
[8/10] Compiling SwiftSignal Source.swift
[9/10] Compiling SwiftSignal Signal.swift
[10/10] Compiling SwiftSignal ThreadLocal.swift
/host/spi-builder-workspace/Sources/SwiftSignal/ThreadLocal.swift:28:36: error: cannot find 'Thread' in scope
26 |     static var value: T? {
27 |         get {
28 |             let threadDictionary = Thread.current.threadDictionary
   |                                    `- error: cannot find 'Thread' in scope
29 |             let maybeBox = threadDictionary.object(forKey: Box<T>.key)
30 |             guard let box = maybeBox as? Box<T> else {
/host/spi-builder-workspace/Sources/SwiftSignal/ThreadLocal.swift:36:36: error: cannot find 'Thread' in scope
34 |         }
35 |         set {
36 |             let threadDictionary = Thread.current.threadDictionary
   |                                    `- error: cannot find 'Thread' in scope
37 |             guard let newValue else {
38 |                 threadDictionary.removeObject(forKey: Box<T>.key)
BUILD FAILURE 6.3 wasm