Swift Package IndexBuild Information
Failed to build ColorSet, reference master (a8853e), with Swift 6.3 for Wasm on 10 Apr 2026 13:16:23 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/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/fromkk/colorset.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/fromkk/colorset
* branch master -> FETCH_HEAD
* [new branch] master -> origin/master
HEAD is now at a8853ed Merge pull request #1 from fromkk/feature/package
Cloned https://github.com/fromkk/colorset.git
Revision (git rev-parse @):
a8853ed187fc7068805f9c2e351da56adaec55dd
SUCCESS checkout https://github.com/fromkk/colorset.git at master
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Build
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Selected platform: wasm
Swift version: 6.3
Building package at path: $PWD
https://github.com/fromkk/colorset.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/host -w "$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
[3/7] Compiling ColorSet ColorType.swift
[4/7] Compiling ColorSet ColorObservationBag.swift
error: emit-module command failed with exit code 1 (use -v to see invocation)
[5/7] Emitting module ColorSet
/host/spi-builder-workspace/Sources/ColorObservable.swift:17:32: error: no exact matches in call to instance method 'post'
15 | public private(set) var value: T {
16 | didSet {
17 | notificationCenter.post(name: didChange, object: value)
| |- error: no exact matches in call to instance method 'post'
| |- note: found candidate with type '(Notification.Name, Notification.Name.Subject) -> ()' (aka '(NSNotification.Name, Notification.Name.Subject) -> ()')
| |- note: found candidate with type '(Notification.Name) -> ()' (aka '(NSNotification.Name) -> ()')
| |- note: found candidate with type '@MainActor (Notification.Name, Notification.Name.Subject) -> ()' (aka '@MainActor (NSNotification.Name, Notification.Name.Subject) -> ()')
| `- note: found candidate with type '@MainActor (Notification.Name) -> ()' (aka '@MainActor (NSNotification.Name) -> ()')
18 | }
19 | }
[6/7] Compiling ColorSet ColorObservation.swift
/host/spi-builder-workspace/Sources/ColorObservation.swift:21:44: error: cannot convert value of type 'any NSObjectProtocol' to expected argument type 'NotificationCenter.ObservationToken'
19 | /// Remove notification.
20 | public func unregister() {
21 | notificationCenter?.removeObserver(observation)
| `- error: cannot convert value of type 'any NSObjectProtocol' to expected argument type 'NotificationCenter.ObservationToken'
22 | }
23 |
/host/spi-builder-workspace/Sources/ColorObservation.swift:32:85: error: value of type 'NotificationCenter' has no member 'isEqual'
30 |
31 | public static func == (lhs: ColorObservation, rhs: ColorObservation) -> Bool {
32 | return lhs.observation.isEqual(rhs.observation) && (lhs.notificationCenter?.isEqual(rhs.notificationCenter) ?? false)
| `- error: value of type 'NotificationCenter' has no member 'isEqual'
33 | }
34 | }
[7/7] Compiling ColorSet ColorObservable.swift
/host/spi-builder-workspace/Sources/ColorObservable.swift:17:32: error: no exact matches in call to instance method 'post'
15 | public private(set) var value: T {
16 | didSet {
17 | notificationCenter.post(name: didChange, object: value)
| |- error: no exact matches in call to instance method 'post'
| |- note: found candidate with type '(Notification.Name, Notification.Name.Subject) -> ()' (aka '(NSNotification.Name, Notification.Name.Subject) -> ()')
| |- note: found candidate with type '(Notification.Name) -> ()' (aka '(NSNotification.Name) -> ()')
| |- note: found candidate with type '@MainActor (Notification.Name, Notification.Name.Subject) -> ()' (aka '@MainActor (NSNotification.Name, Notification.Name.Subject) -> ()')
| `- note: found candidate with type '@MainActor (Notification.Name) -> ()' (aka '@MainActor (NSNotification.Name) -> ()')
18 | }
19 | }
/host/spi-builder-workspace/Sources/ColorObservable.swift:39:32: error: argument type 'NotificationCenter.ObservationToken' does not conform to expected type 'NSObjectProtocol'
37 | callback(value)
38 | return ColorObservation(
39 | notificationCenter.addObserver(forName: didChange, object: nil, queue: .main, using: { notification in
| `- error: argument type 'NotificationCenter.ObservationToken' does not conform to expected type 'NSObjectProtocol'
40 | guard let value = notification.object as? T else { return }
41 | callback(value)
/host/spi-builder-workspace/Sources/ColorObservable.swift:39:43: error: extra arguments at positions #1, #2, #3 in call
37 | callback(value)
38 | return ColorObservation(
39 | notificationCenter.addObserver(forName: didChange, object: nil, queue: .main, using: { notification in
| `- error: extra arguments at positions #1, #2, #3 in call
40 | guard let value = notification.object as? T else { return }
41 | callback(value)
FoundationEssentials.NotificationCenter.addObserver:2:13: note: 'addObserver(of:for:using:)' declared here
1 | class NotificationCenter {
2 | public func addObserver<Message>(of subject: Message.Subject? = nil, for messageType: Message.Type, using observer: @escaping @MainActor (Message) -> Void) -> NotificationCenter.ObservationToken where Message : NotificationCenter.MainActorMessage, Message.Subject : AnyObject}
| `- note: 'addObserver(of:for:using:)' declared here
3 |
/host/spi-builder-workspace/Sources/ColorObservable.swift:39:62: error: missing argument for parameter 'for' in call
37 | callback(value)
38 | return ColorObservation(
39 | notificationCenter.addObserver(forName: didChange, object: nil, queue: .main, using: { notification in
| `- error: missing argument for parameter 'for' in call
40 | guard let value = notification.object as? T else { return }
41 | callback(value)
FoundationEssentials.NotificationCenter.addObserver:2:13: note: 'addObserver(of:for:using:)' declared here
1 | class NotificationCenter {
2 | public func addObserver<Message>(of subject: Message.Subject? = nil, for messageType: Message.Type, using observer: @escaping @MainActor (Message) -> Void) -> NotificationCenter.ObservationToken where Message : NotificationCenter.MainActorMessage, Message.Subject : AnyObject}
| `- note: 'addObserver(of:for:using:)' declared here
3 |
/host/spi-builder-workspace/Sources/ColorObservable.swift:39:72: error: 'nil' requires a contextual type
37 | callback(value)
38 | return ColorObservation(
39 | notificationCenter.addObserver(forName: didChange, object: nil, queue: .main, using: { notification in
| `- error: 'nil' requires a contextual type
40 | guard let value = notification.object as? T else { return }
41 | callback(value)
/host/spi-builder-workspace/Sources/ColorObservable.swift:39:85: error: cannot infer contextual base in reference to member 'main'
37 | callback(value)
38 | return ColorObservation(
39 | notificationCenter.addObserver(forName: didChange, object: nil, queue: .main, using: { notification in
| `- error: cannot infer contextual base in reference to member 'main'
40 | guard let value = notification.object as? T else { return }
41 | callback(value)
BUILD FAILURE 6.3 wasm