Swift Package Index

Build Information

Failed to build ConcurrencyRecipes, reference main (d16dd8), with Swift 6.3 for Wasm on 16 Apr 2026 20:12:23 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/mattmassicotte/ConcurrencyRecipes.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/mattmassicotte/ConcurrencyRecipes
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at d16dd87 Update Protocols.md (#19)
Cloned https://github.com/mattmassicotte/ConcurrencyRecipes.git
Revision (git rev-parse @):
d16dd875305c3e9f472a44b1f4340d4f5b0b13e5
SUCCESS checkout https://github.com/mattmassicotte/ConcurrencyRecipes.git at main
========================================
Build
========================================
Selected platform:         wasm
Swift version:             6.3
Building package at path:  $PWD
https://github.com/mattmassicotte/ConcurrencyRecipes.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/host -w "$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...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/4] Emitting module PreconcurrencyLib
[4/4] Compiling PreconcurrencyLib PreconcurrencyStuff.swift
/host/spi-builder-workspace/Sources/PreconcurrencyLib/PreconcurrencyStuff.swift:4:2: error: cannot find 'DispatchQueue' in scope
 2 |
 3 | public func acceptEscapingBlock(_ block: @escaping () -> Void) {
 4 | 	DispatchQueue.global().async {
   |  `- error: cannot find 'DispatchQueue' in scope
 5 | 		block()
 6 | 	}
/host/spi-builder-workspace/Sources/PreconcurrencyLib/PreconcurrencyStuff.swift:10:2: error: cannot find 'DispatchQueue' in scope
 8 |
 9 | public func unannotatedEscapingSendableBlock(_ block: @escaping @Sendable () -> Void) {
10 | 	DispatchQueue.global().async {
   |  `- error: cannot find 'DispatchQueue' in scope
11 | 		block()
12 | 	}
/host/spi-builder-workspace/Sources/PreconcurrencyLib/PreconcurrencyStuff.swift:17:2: error: cannot find 'DispatchQueue' in scope
15 | @preconcurrency
16 | public func annotatedEscapingSendableBlock(_ block: @escaping @Sendable () -> Void) {
17 | 	DispatchQueue.global().async {
   |  `- error: cannot find 'DispatchQueue' in scope
18 | 		block()
19 | 	}
BUILD FAILURE 6.3 wasm