Swift Package IndexBuild Information
Failed to build LazyContainers, reference 4.1.0 (360a35), with Swift 6.3 for Wasm on 21 Apr 2026 08:26:18 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-4609320-2":/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/RougeWare/Swift-Lazy-Containers.git
Reference: 4.1.0
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/RougeWare/Swift-Lazy-Containers
* tag 4.1.0 -> FETCH_HEAD
HEAD is now at 360a35c Merge pull request #37 from RougeWare/feature/Autoconformance
Cloned https://github.com/RougeWare/Swift-Lazy-Containers.git
Revision (git rev-parse @):
360a35c98992fc53739e884fb0c48e988710fa92
SUCCESS checkout https://github.com/RougeWare/Swift-Lazy-Containers.git at 4.1.0
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Build
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Selected platform: wasm
Swift version: 6.3
Building package at path: $PWD
https://github.com/RougeWare/Swift-Lazy-Containers.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-2":/host -w "$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...
[0/5] Write sources
[1/5] Write swift-version-24593BA9C3E375BF.txt
[3/10] Compiling LazyContainers LazyContainer + Hashable.swift
[4/10] Compiling LazyContainers LazyContainers.swift
/host/spi-builder-workspace/Sources/LazyContainers/LazyContainers.swift:408:30: warning: generic parameter 'Value' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
345 | /// semaphore was added to mitigate this, but again, it hasn't undergone rigorous real-world testing.
346 | @propertyWrapper
347 | public struct FunctionalLazy<Value>: LazyContainer {
| `- note: 'Value' previously declared here
348 |
349 | /// Privatizes the inner-workings of this functional lazy container
:
406 | /// The actual functionality of `FunctionalLazy`, separated so that the semantics work out better
407 | @propertyWrapper
408 | private final class Guts<Value> {
| `- warning: generic parameter 'Value' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
409 |
410 | /// The closure called every time a value is needed
/host/spi-builder-workspace/Sources/LazyContainers/LazyContainers.swift:415:24: error: cannot find type 'DispatchSemaphore' in scope
413 | /// Guarantees that, on first-init, only one thread initializes the value. After that, this is set to `nil`
414 | /// because subsequent threads can safely access the value without the risk of setting it again.
415 | var semaphore: DispatchSemaphore? = .init(value: 1)
| `- error: cannot find type 'DispatchSemaphore' in scope
416 |
417 |
[5/10] Compiling LazyContainers LazyContainer + Equatable.swift
error: emit-module command failed with exit code 1 (use -v to see invocation)
[6/10] Emitting module LazyContainers
/host/spi-builder-workspace/Sources/LazyContainers/LazyContainers.swift:408:30: warning: generic parameter 'Value' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
345 | /// semaphore was added to mitigate this, but again, it hasn't undergone rigorous real-world testing.
346 | @propertyWrapper
347 | public struct FunctionalLazy<Value>: LazyContainer {
| `- note: 'Value' previously declared here
348 |
349 | /// Privatizes the inner-workings of this functional lazy container
:
406 | /// The actual functionality of `FunctionalLazy`, separated so that the semantics work out better
407 | @propertyWrapper
408 | private final class Guts<Value> {
| `- warning: generic parameter 'Value' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
409 |
410 | /// The closure called every time a value is needed
/host/spi-builder-workspace/Sources/LazyContainers/LazyContainers.swift:415:24: error: cannot find type 'DispatchSemaphore' in scope
413 | /// Guarantees that, on first-init, only one thread initializes the value. After that, this is set to `nil`
414 | /// because subsequent threads can safely access the value without the risk of setting it again.
415 | var semaphore: DispatchSemaphore? = .init(value: 1)
| `- error: cannot find type 'DispatchSemaphore' in scope
416 |
417 |
[7/10] Compiling LazyContainers LazyContainer + Codable.swift
BUILD FAILURE 6.3 wasm