Swift Package IndexBuild Information
Failed to build Observable, reference master (60aad1), with Swift 6.3 for Wasm on 15 Apr 2026 14:56:49 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/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/roberthein/Observable.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/roberthein/Observable
* branch master -> FETCH_HEAD
* [new branch] master -> origin/master
HEAD is now at 60aad1e Update min target
Cloned https://github.com/roberthein/Observable.git
Revision (git rev-parse @):
60aad1ecc56ae0b54e68bfb48aa89cb026488fc5
SUCCESS checkout https://github.com/roberthein/Observable.git at master
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Build
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Selected platform: wasm
Swift version: 6.3
Building package at path: $PWD
https://github.com/roberthein/Observable.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/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
[3/6] Compiling Observable Observable+Binding.swift
/host/spi-builder-workspace/Observable/Classes/Observable.swift:53:34: error: cannot find type 'DispatchQueue' in scope
51 | }
52 |
53 | public func observe(_ queue: DispatchQueue? = nil, _ observer: @escaping Observer) -> Disposable {
| `- error: cannot find type 'DispatchQueue' in scope
54 | lock.lock()
55 | defer { lock.unlock() }
/host/spi-builder-workspace/Observable/Classes/Observable+Binding.swift:31:32: error: cannot infer type of closure parameter 'new' without a type annotation
29 | ///
30 | func bind<O>(to object: O, _ objectKeyPath: ReferenceWritableKeyPath<O, T>, disposal: inout Disposal) {
31 | observe { [weak self] (new, old) in
| `- error: cannot infer type of closure parameter 'new' without a type annotation
32 | guard let self = self else { return }
33 | object[keyPath: objectKeyPath] = self.wrappedValue
/host/spi-builder-workspace/Observable/Classes/Observable+Binding.swift:31:37: error: cannot infer type of closure parameter 'old' without a type annotation
29 | ///
30 | func bind<O>(to object: O, _ objectKeyPath: ReferenceWritableKeyPath<O, T>, disposal: inout Disposal) {
31 | observe { [weak self] (new, old) in
| `- error: cannot infer type of closure parameter 'old' without a type annotation
32 | guard let self = self else { return }
33 | object[keyPath: objectKeyPath] = self.wrappedValue
/host/spi-builder-workspace/Observable/Classes/Observable+Binding.swift:58:32: error: cannot infer type of closure parameter 'new' without a type annotation
56 | ///
57 | func bind<O>(to object: O, _ objectKeyPath: ReferenceWritableKeyPath<O, T?>, disposal: inout Disposal) {
58 | observe { [weak self] (new, old) in
| `- error: cannot infer type of closure parameter 'new' without a type annotation
59 | guard let self = self else { return }
60 | object[keyPath: objectKeyPath] = self.wrappedValue
/host/spi-builder-workspace/Observable/Classes/Observable+Binding.swift:58:37: error: cannot infer type of closure parameter 'old' without a type annotation
56 | ///
57 | func bind<O>(to object: O, _ objectKeyPath: ReferenceWritableKeyPath<O, T?>, disposal: inout Disposal) {
58 | observe { [weak self] (new, old) in
| `- error: cannot infer type of closure parameter 'old' without a type annotation
59 | guard let self = self else { return }
60 | object[keyPath: objectKeyPath] = self.wrappedValue
/host/spi-builder-workspace/Observable/Classes/Observable+Binding.swift:85:32: error: cannot infer type of closure parameter 'new' without a type annotation
83 | /// ```
84 | func bind<O: NSObject, R>(to object: O, _ objectKeyPath: ReferenceWritableKeyPath<O, R>, disposal: inout Disposal, transform: @escaping (T) -> R) {
85 | observe { [weak self] (new, old) in
| `- error: cannot infer type of closure parameter 'new' without a type annotation
86 | guard let self = self else { return }
87 | let value = self.wrappedValue
/host/spi-builder-workspace/Observable/Classes/Observable+Binding.swift:85:37: error: cannot infer type of closure parameter 'old' without a type annotation
83 | /// ```
84 | func bind<O: NSObject, R>(to object: O, _ objectKeyPath: ReferenceWritableKeyPath<O, R>, disposal: inout Disposal, transform: @escaping (T) -> R) {
85 | observe { [weak self] (new, old) in
| `- error: cannot infer type of closure parameter 'old' without a type annotation
86 | guard let self = self else { return }
87 | let value = self.wrappedValue
/host/spi-builder-workspace/Observable/Classes/Observable+Binding.swift:114:32: error: cannot infer type of closure parameter 'new' without a type annotation
112 | ///
113 | func bind<O: NSObject, R>(to object: O, _ objectKeyPath: ReferenceWritableKeyPath<O, R?>, disposal: inout Disposal, transform: @escaping (T) -> R?) {
114 | observe { [weak self] (new, old) in
| `- error: cannot infer type of closure parameter 'new' without a type annotation
115 | guard let self = self else { return }
116 | let value = self.wrappedValue
/host/spi-builder-workspace/Observable/Classes/Observable+Binding.swift:114:37: error: cannot infer type of closure parameter 'old' without a type annotation
112 | ///
113 | func bind<O: NSObject, R>(to object: O, _ objectKeyPath: ReferenceWritableKeyPath<O, R?>, disposal: inout Disposal, transform: @escaping (T) -> R?) {
114 | observe { [weak self] (new, old) in
| `- error: cannot infer type of closure parameter 'old' without a type annotation
115 | guard let self = self else { return }
116 | let value = self.wrappedValue
[4/6] Compiling Observable Observable.swift
/host/spi-builder-workspace/Observable/Classes/Observable.swift:10:45: error: cannot find type 'DispatchQueue' in scope
8 | public typealias Observer = (T, T?) -> Void
9 |
10 | private var observers: [Int: (Observer, DispatchQueue?)] = [:]
| `- error: cannot find type 'DispatchQueue' in scope
11 | private var uniqueID = (0...).makeIterator()
12 |
/host/spi-builder-workspace/Observable/Classes/Observable.swift:83:66: error: cannot find type 'DispatchQueue' in scope
81 | }
82 |
83 | fileprivate func notify(observer: @escaping Observer, queue: DispatchQueue? = nil, value: T, oldValue: T? = nil) {
| `- error: cannot find type 'DispatchQueue' in scope
84 | if let queue = queue {
85 | queue.async {
/host/spi-builder-workspace/Observable/Classes/Observable.swift:53:34: error: cannot find type 'DispatchQueue' in scope
51 | }
52 |
53 | public func observe(_ queue: DispatchQueue? = nil, _ observer: @escaping Observer) -> Disposable {
| `- error: cannot find type 'DispatchQueue' in scope
54 | lock.lock()
55 | defer { lock.unlock() }
error: emit-module command failed with exit code 1 (use -v to see invocation)
[5/6] Compiling Observable Disposable.swift
[6/6] Emitting module Observable
/host/spi-builder-workspace/Observable/Classes/Observable.swift:10:45: error: cannot find type 'DispatchQueue' in scope
8 | public typealias Observer = (T, T?) -> Void
9 |
10 | private var observers: [Int: (Observer, DispatchQueue?)] = [:]
| `- error: cannot find type 'DispatchQueue' in scope
11 | private var uniqueID = (0...).makeIterator()
12 |
/host/spi-builder-workspace/Observable/Classes/Observable.swift:83:66: error: cannot find type 'DispatchQueue' in scope
81 | }
82 |
83 | fileprivate func notify(observer: @escaping Observer, queue: DispatchQueue? = nil, value: T, oldValue: T? = nil) {
| `- error: cannot find type 'DispatchQueue' in scope
84 | if let queue = queue {
85 | queue.async {
/host/spi-builder-workspace/Observable/Classes/Observable.swift:53:34: error: cannot find type 'DispatchQueue' in scope
51 | }
52 |
53 | public func observe(_ queue: DispatchQueue? = nil, _ observer: @escaping Observer) -> Disposable {
| `- error: cannot find type 'DispatchQueue' in scope
54 | lock.lock()
55 | defer { lock.unlock() }
BUILD FAILURE 6.3 wasm