Swift Package IndexBuild Information
Failed to build Assertions, reference main (c815e2), with Swift 6.3 for Wasm on 16 Apr 2026 21:23:18 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>&1Build Log
========================================
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/harlanhaskins/assertions.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/harlanhaskins/assertions
* branch main -> FETCH_HEAD
* [new branch] main -> origin/main
HEAD is now at c815e2c Initial commit
Cloned https://github.com/harlanhaskins/assertions.git
Revision (git rev-parse @):
c815e2cff666d1cbe603e782ab01dfe2f39c1f73
SUCCESS checkout https://github.com/harlanhaskins/assertions.git at main
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Build
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Selected platform: wasm
Swift version: 6.3
Building package at path: $PWD
https://github.com/harlanhaskins/assertions.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/host -w "$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
Fetching https://github.com/apple/swift-collections
[1/23551] Fetching swift-collections
Fetched https://github.com/apple/swift-collections from cache (1.56s)
Computing version for https://github.com/apple/swift-collections
Computed https://github.com/apple/swift-collections at 1.4.1 (3.32s)
Creating working copy for https://github.com/apple/swift-collections
Working copy of https://github.com/apple/swift-collections resolved at 1.4.1
Building for debugging...
[0/11] Write sources
[10/11] Write swift-version-24593BA9C3E375BF.txt
[12/29] Emitting module InternalCollectionsUtilities
[13/31] Compiling InternalCollectionsUtilities _SortedCollection.swift
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[30/31] Compiling InternalCollectionsUtilities UInt+first and last set bit.swift
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[118/387] Compiling HashTreeCollections TreeSet+SetAlgebra Initializers.swift
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[123/387] Compiling _RopeModule BigString+Comparable.swift
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[225/392] Compiling OrderedCollections _UnsafeBitset.swift
[251/403] Emitting module OrderedCollections
[271/404] Compiling HashTreeCollections _HashTreeIterator.swift
[272/404] Compiling HashTreeCollections _HashTreeStatistics.swift
[273/404] Compiling _RopeModule RopeSummary.swift
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[322/413] Compiling HashTreeCollections TreeSet+SetAlgebra union.swift
[323/413] Compiling HashTreeCollections TreeSet.swift
[335/413] Emitting module _RopeModule
[398/413] Emitting module HashTreeCollections
[399/414] Emitting module DequeModule
[407/415] Compiling _RopeModule Rope+Join.swift
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[421/422] Emitting module Collections
[422/422] Compiling Collections HashTreeCollections reexports.swift
[424/428] Compiling Assertions UUID+ShortID.swift
[425/428] Compiling Assertions AssertionValue.swift
[426/428] Compiling Assertions Assertion.swift
error: emit-module command failed with exit code 1 (use -v to see invocation)
[427/428] Emitting module Assertions
/host/spi-builder-workspace/Sources/Assertions/AssertionManager.swift:50:2: error: unknown attribute 'Observable'
48 | /// AssertionManager is `@Observable` so clients can observe the state of `value`. To receive synchronous updates,
49 | /// register yourself as the `delegate` instead.
50 | @Observable
| `- error: unknown attribute 'Observable'
51 | public final class AssertionManager<Value: AssertionValue>: CustomStringConvertible, AssertionManaging {
52 | struct ActiveAssertion {
[428/428] Compiling Assertions AssertionManager.swift
/host/spi-builder-workspace/Sources/Assertions/AssertionManager.swift:50:2: error: unknown attribute 'Observable'
48 | /// AssertionManager is `@Observable` so clients can observe the state of `value`. To receive synchronous updates,
49 | /// register yourself as the `delegate` instead.
50 | @Observable
| `- error: unknown attribute 'Observable'
51 | public final class AssertionManager<Value: AssertionValue>: CustomStringConvertible, AssertionManaging {
52 | struct ActiveAssertion {
BUILD FAILURE 6.3 wasm