The Swift Package Index logo.Swift Package Index

Build Information

Failed to build ConcurrencyRecipes, reference main (d16dd8), with Swift 6.1 for Wasm on 28 Aug 2025 14:06:37 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/finestructure/spi-images:wasm-6.1-latest swift build --swift-sdk wasm32-unknown-wasi 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.67.1
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:             6.1
Building package at path:  $PWD
https://github.com/mattmassicotte/ConcurrencyRecipes.git
https://github.com/mattmassicotte/ConcurrencyRecipes.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "ConcurrencyRecipes",
  "name" : "ConcurrencyRecipes",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
  ],
  "targets" : [
    {
      "c99name" : "PreconcurrencyLib",
      "module_type" : "SwiftTarget",
      "name" : "PreconcurrencyLib",
      "path" : "Sources/PreconcurrencyLib",
      "sources" : [
        "PreconcurrencyStuff.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "ConcurrencyRecipesTests",
      "module_type" : "SwiftTarget",
      "name" : "ConcurrencyRecipesTests",
      "path" : "Tests/ConcurrencyRecipesTests",
      "sources" : [
        "PreconcurrencyLibTests.swift"
      ],
      "target_dependencies" : [
        "PreconcurrencyLib"
      ],
      "type" : "test"
    }
  ],
  "tools_version" : "5.10"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/finestructure/spi-images:wasm-6.1-latest swift build --swift-sdk wasm32-unknown-wasi -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures 2>&1
wasm-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:eb0758f51dbd6991fb9e51dedbfbcbec142ffc0d3b9b8ad91fa19d35e5136f0a
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:wasm-6.1-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 | 	}
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/finestructure/spi-images:wasm-6.1-latest swift build --swift-sdk wasm32-unknown-wasi 2>&1
wasm-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:eb0758f51dbd6991fb9e51dedbfbcbec142ffc0d3b9b8ad91fa19d35e5136f0a
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:wasm-6.1-latest
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-24593BA9C3E375BF.txt
[2/3] Emitting module PreconcurrencyLib
[3/3] 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 6.1 wasm