Swift Package Index

Build Information

Failed to build WebSocket, reference main (3a934c), with Swift 6.0 for Linux on 22 Apr 2026 01:20:07 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-3":/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:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.70.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/shareup/websocket-apple.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/shareup/websocket-apple
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 3a934c8 Fix race conditions (#20)
Cloned https://github.com/shareup/websocket-apple.git
Revision (git rev-parse @):
3a934c8d91e85b732605d58424acf75e96114282
SUCCESS checkout https://github.com/shareup/websocket-apple.git at main
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.0
Building package at path:  $PWD
https://github.com/shareup/websocket-apple.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-3":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu 2>&1
basic-6.0-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:6ccbc5e7995f6c524368c1828f9c677d1727c16390a603fc668217aec5f5123a
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:basic-6.0-latest
Fetching https://github.com/shareup/dispatch-timer.git
Fetching https://github.com/vapor/websocket-kit.git
Fetching https://github.com/shareup/async-extensions.git
Fetching https://github.com/apple/swift-nio.git
[1/105] Fetching dispatch-timer
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Fetched https://github.com/shareup/dispatch-timer.git from cache (0.34s)
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Fetched https://github.com/shareup/async-extensions.git from cache (0.36s)
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[2659/85860] Fetching websocket-kit, swift-nio
Fetched https://github.com/vapor/websocket-kit.git from cache (10.09s)
Fetched https://github.com/apple/swift-nio.git from cache (10.22s)
Computing version for https://github.com/shareup/dispatch-timer.git
Computed https://github.com/shareup/dispatch-timer.git at 3.0.1 (2.96s)
Fetching https://github.com/shareup/synchronized.git
[1/226] Fetching synchronized
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Computing version for https://github.com/shareup/async-extensions.git
Computed https://github.com/shareup/async-extensions.git at 4.4.0 (0.82s)
Computing version for https://github.com/shareup/synchronized.git
Computed https://github.com/shareup/synchronized.git at 4.0.1 (0.99s)
Computing version for https://github.com/vapor/websocket-kit.git
Computed https://github.com/vapor/websocket-kit.git at 2.16.2 (0.83s)
Fetching https://github.com/apple/swift-nio-extras.git
Fetching https://github.com/apple/swift-atomics.git
Fetching https://github.com/apple/swift-nio-ssl.git
Fetching https://github.com/apple/swift-nio-transport-services.git
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Fetched https://github.com/apple/swift-nio-extras.git from cache (0.79s)
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Fetched https://github.com/apple/swift-nio-transport-services.git from cache (2.42s)
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Fetched https://github.com/apple/swift-nio-ssl.git from cache (2.45s)
Computing version for https://github.com/apple/swift-atomics.git
Computed https://github.com/apple/swift-atomics.git at 1.3.0 (0.72s)
Computing version for https://github.com/apple/swift-nio-transport-services.git
Computed https://github.com/apple/swift-nio-transport-services.git at 1.26.0 (0.84s)
Computing version for https://github.com/apple/swift-nio-ssl.git
Computed https://github.com/apple/swift-nio-ssl.git at 2.36.1 (0.99s)
Computing version for https://github.com/apple/swift-nio.git
Computed https://github.com/apple/swift-nio.git at 2.97.1 (1.36s)
Fetching https://github.com/apple/swift-system.git
Fetching https://github.com/apple/swift-collections.git
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Fetched https://github.com/apple/swift-system.git from cache (0.62s)
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Fetched https://github.com/apple/swift-collections.git from cache (2.06s)
Computing version for https://github.com/apple/swift-system.git
Computed https://github.com/apple/swift-system.git at 1.6.4 (1.03s)
Computing version for https://github.com/apple/swift-collections.git
Computed https://github.com/apple/swift-collections.git at 1.4.1 (1.32s)
Computing version for https://github.com/apple/swift-nio-extras.git
Computed https://github.com/apple/swift-nio-extras.git at 1.33.0 (1.00s)
Fetching https://github.com/apple/swift-asn1.git
Fetching https://github.com/apple/swift-log.git
Fetching https://github.com/swift-server/swift-service-lifecycle.git
Fetching https://github.com/apple/swift-algorithms.git
Fetching https://github.com/apple/swift-async-algorithms.git
Fetching https://github.com/apple/swift-certificates.git
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[6252/30641] Fetching swift-asn1, swift-algorithms, swift-log, swift-service-lifecycle, swift-async-algorithms, swift-certificates
Fetched https://github.com/apple/swift-asn1.git from cache (1.08s)
Fetching https://github.com/apple/swift-http-structured-headers.git
Fetched https://github.com/apple/swift-log.git from cache (1.10s)
Fetching https://github.com/apple/swift-http-types.git
Fetched https://github.com/swift-server/swift-service-lifecycle.git from cache (1.26s)
Fetched https://github.com/apple/swift-algorithms.git from cache (1.26s)
Fetched https://github.com/apple/swift-async-algorithms.git from cache (1.26s)
Fetched https://github.com/apple/swift-certificates.git from cache (1.26s)
Fetching https://github.com/apple/swift-nio-http2.git
[1/1242] Fetching swift-http-structured-headers
[1243/2285] Fetching swift-http-structured-headers, swift-http-types
Fetched https://github.com/apple/swift-http-types.git from cache (0.39s)
Fetched https://github.com/apple/swift-http-structured-headers.git from cache (0.41s)
[1/12108] Fetching swift-nio-http2
Fetched https://github.com/apple/swift-nio-http2.git from cache (1.45s)
Computing version for https://github.com/apple/swift-algorithms.git
Computed https://github.com/apple/swift-algorithms.git at 1.2.1 (0.72s)
Fetching https://github.com/apple/swift-numerics.git
[1/6416] Fetching swift-numerics
Fetched https://github.com/apple/swift-numerics.git from cache (0.76s)
Computing version for https://github.com/apple/swift-http-types.git
Computed https://github.com/apple/swift-http-types.git at 1.5.1 (0.70s)
Computing version for https://github.com/swift-server/swift-service-lifecycle.git
Computed https://github.com/swift-server/swift-service-lifecycle.git at 2.11.0 (0.66s)
Computing version for https://github.com/apple/swift-async-algorithms.git
Computed https://github.com/apple/swift-async-algorithms.git at 1.1.3 (0.77s)
Computing version for https://github.com/apple/swift-numerics.git
Computed https://github.com/apple/swift-numerics.git at 1.1.1 (0.66s)
Computing version for https://github.com/apple/swift-asn1.git
Computed https://github.com/apple/swift-asn1.git at 1.6.0 (3.50s)
Computing version for https://github.com/apple/swift-certificates.git
Computed https://github.com/apple/swift-certificates.git at 1.18.0 (0.78s)
Fetching https://github.com/apple/swift-crypto.git
[1/17436] Fetching swift-crypto
Fetched https://github.com/apple/swift-crypto.git from cache (2.46s)
Computing version for https://github.com/apple/swift-http-structured-headers.git
Computed https://github.com/apple/swift-http-structured-headers.git at 1.6.0 (0.73s)
Computing version for https://github.com/apple/swift-log.git
Computed https://github.com/apple/swift-log.git at 1.11.0 (0.76s)
Computing version for https://github.com/apple/swift-crypto.git
Computed https://github.com/apple/swift-crypto.git at 4.3.1 (2.89s)
Computing version for https://github.com/apple/swift-nio-http2.git
Computed https://github.com/apple/swift-nio-http2.git at 1.42.0 (0.96s)
Creating working copy for https://github.com/apple/swift-nio-ssl.git
Working copy of https://github.com/apple/swift-nio-ssl.git resolved at 2.36.1
Creating working copy for https://github.com/apple/swift-numerics.git
Working copy of https://github.com/apple/swift-numerics.git resolved at 1.1.1
Creating working copy for https://github.com/apple/swift-system.git
Working copy of https://github.com/apple/swift-system.git resolved at 1.6.4
Creating working copy for https://github.com/shareup/synchronized.git
Working copy of https://github.com/shareup/synchronized.git resolved at 4.0.1
Creating working copy for https://github.com/apple/swift-certificates.git
Working copy of https://github.com/apple/swift-certificates.git resolved at 1.18.0
Creating working copy for https://github.com/apple/swift-http-structured-headers.git
Working copy of https://github.com/apple/swift-http-structured-headers.git resolved at 1.6.0
Creating working copy for https://github.com/apple/swift-crypto.git
Working copy of https://github.com/apple/swift-crypto.git resolved at 4.3.1
Creating working copy for https://github.com/apple/swift-nio-extras.git
Working copy of https://github.com/apple/swift-nio-extras.git resolved at 1.33.0
Creating working copy for https://github.com/apple/swift-log.git
Working copy of https://github.com/apple/swift-log.git resolved at 1.11.0
Creating working copy for https://github.com/vapor/websocket-kit.git
Working copy of https://github.com/vapor/websocket-kit.git resolved at 2.16.2
Creating working copy for https://github.com/apple/swift-atomics.git
Working copy of https://github.com/apple/swift-atomics.git resolved at 1.3.0
Creating working copy for https://github.com/apple/swift-nio-transport-services.git
Working copy of https://github.com/apple/swift-nio-transport-services.git resolved at 1.26.0
Creating working copy for https://github.com/shareup/async-extensions.git
Working copy of https://github.com/shareup/async-extensions.git resolved at 4.4.0
Creating working copy for https://github.com/apple/swift-algorithms.git
Working copy of https://github.com/apple/swift-algorithms.git resolved at 1.2.1
Creating working copy for https://github.com/swift-server/swift-service-lifecycle.git
Working copy of https://github.com/swift-server/swift-service-lifecycle.git resolved at 2.11.0
Creating working copy for https://github.com/apple/swift-asn1.git
Working copy of https://github.com/apple/swift-asn1.git resolved at 1.6.0
Creating working copy for https://github.com/apple/swift-http-types.git
Working copy of https://github.com/apple/swift-http-types.git resolved at 1.5.1
Creating working copy for https://github.com/apple/swift-collections.git
Working copy of https://github.com/apple/swift-collections.git resolved at 1.4.1
Creating working copy for https://github.com/apple/swift-nio.git
Working copy of https://github.com/apple/swift-nio.git resolved at 2.97.1
Creating working copy for https://github.com/apple/swift-nio-http2.git
Working copy of https://github.com/apple/swift-nio-http2.git resolved at 1.42.0
Creating working copy for https://github.com/apple/swift-async-algorithms.git
Working copy of https://github.com/apple/swift-async-algorithms.git resolved at 1.1.3
Creating working copy for https://github.com/shareup/dispatch-timer.git
Working copy of https://github.com/shareup/dispatch-timer.git resolved at 3.0.1
Building for debugging...
[0/5] Write sources
[4/5] Write swift-version-24593BA9C3E375BF.txt
[6/9] Compiling Synchronized Locked.swift
/host/spi-builder-workspace/.build/checkouts/synchronized/Sources/Synchronized/Locked.swift:4:54: error: cannot find type 'os_unfair_lock' in scope
 2 |
 3 | public struct Locked<Element> {
 4 |     private final class Lock: ManagedBuffer<Element, os_unfair_lock> {
   |                                                      `- error: cannot find type 'os_unfair_lock' in scope
 5 |         deinit {
 6 |             withUnsafeMutablePointerToElements { lock in
/host/spi-builder-workspace/.build/checkouts/synchronized/Sources/Synchronized/Locked.swift:12:48: error: cannot find type 'os_unfair_lock' in scope
10 |     }
11 |
12 |     private let buffer: ManagedBuffer<Element, os_unfair_lock>
   |                                                `- error: cannot find type 'os_unfair_lock' in scope
13 |
14 |     public init(_ element: Element) {
/host/spi-builder-workspace/.build/checkouts/synchronized/Sources/Synchronized/Locked.swift:6:13: error: type of expression is ambiguous without a type annotation
 4 |     private final class Lock: ManagedBuffer<Element, os_unfair_lock> {
 5 |         deinit {
 6 |             withUnsafeMutablePointerToElements { lock in
   |             `- error: type of expression is ambiguous without a type annotation
 7 |                 _ = lock.deinitialize(count: 1)
 8 |             }
/host/spi-builder-workspace/.build/checkouts/synchronized/Sources/Synchronized/Locked.swift:17:35: error: cannot find 'os_unfair_lock' in scope
15 |         buffer = Lock.create(minimumCapacity: 1) { buffer in
16 |             buffer.withUnsafeMutablePointerToElements {
17 |                 $0.initialize(to: os_unfair_lock())
   |                                   `- error: cannot find 'os_unfair_lock' in scope
18 |             }
19 |             return element
/host/spi-builder-workspace/.build/checkouts/synchronized/Sources/Synchronized/Locked.swift:15:16: error: type of expression is ambiguous without a type annotation
13 |
14 |     public init(_ element: Element) {
15 |         buffer = Lock.create(minimumCapacity: 1) { buffer in
   |                `- error: type of expression is ambiguous without a type annotation
16 |             buffer.withUnsafeMutablePointerToElements {
17 |                 $0.initialize(to: os_unfair_lock())
/host/spi-builder-workspace/.build/checkouts/synchronized/Sources/Synchronized/Locked.swift:25:13: error: cannot find 'os_unfair_lock_lock' in scope
23 |     public func access<Return>(_ block: (inout Element) throws -> Return) rethrows -> Return {
24 |         try buffer.withUnsafeMutablePointers { element, lock in
25 |             os_unfair_lock_lock(lock)
   |             `- error: cannot find 'os_unfair_lock_lock' in scope
26 |             defer { os_unfair_lock_unlock(lock) }
27 |             return try block(&element.pointee)
error: emit-module command failed with exit code 1 (use -v to see invocation)
[7/9] Emitting module Synchronized
/host/spi-builder-workspace/.build/checkouts/synchronized/Sources/Synchronized/Lock.swift:4:47: error: cannot find type 'os_unfair_lock' in scope
 2 |
 3 | public final class Lock {
 4 |     private var backing: UnsafeMutablePointer<os_unfair_lock>
   |                                               `- error: cannot find type 'os_unfair_lock' in scope
 5 |
 6 |     public init() {
/host/spi-builder-workspace/.build/checkouts/synchronized/Sources/Synchronized/Locked.swift:4:54: error: cannot find type 'os_unfair_lock' in scope
 2 |
 3 | public struct Locked<Element> {
 4 |     private final class Lock: ManagedBuffer<Element, os_unfair_lock> {
   |                                                      `- error: cannot find type 'os_unfair_lock' in scope
 5 |         deinit {
 6 |             withUnsafeMutablePointerToElements { lock in
/host/spi-builder-workspace/.build/checkouts/synchronized/Sources/Synchronized/Locked.swift:12:48: error: cannot find type 'os_unfair_lock' in scope
10 |     }
11 |
12 |     private let buffer: ManagedBuffer<Element, os_unfair_lock>
   |                                                `- error: cannot find type 'os_unfair_lock' in scope
13 |
14 |     public init(_ element: Element) {
[8/9] Compiling Synchronized Lock.swift
/host/spi-builder-workspace/.build/checkouts/synchronized/Sources/Synchronized/Lock.swift:4:47: error: cannot find type 'os_unfair_lock' in scope
 2 |
 3 | public final class Lock {
 4 |     private var backing: UnsafeMutablePointer<os_unfair_lock>
   |                                               `- error: cannot find type 'os_unfair_lock' in scope
 5 |
 6 |     public init() {
/host/spi-builder-workspace/.build/checkouts/synchronized/Sources/Synchronized/Lock.swift:7:40: error: cannot find type 'os_unfair_lock' in scope
 5 |
 6 |     public init() {
 7 |         backing = UnsafeMutablePointer<os_unfair_lock>.allocate(capacity: 1)
   |                                        `- error: cannot find type 'os_unfair_lock' in scope
 8 |         backing.initialize(to: os_unfair_lock())
 9 |     }
/host/spi-builder-workspace/.build/checkouts/synchronized/Sources/Synchronized/Lock.swift:8:32: error: cannot find 'os_unfair_lock' in scope
 6 |     public init() {
 7 |         backing = UnsafeMutablePointer<os_unfair_lock>.allocate(capacity: 1)
 8 |         backing.initialize(to: os_unfair_lock())
   |                                `- error: cannot find 'os_unfair_lock' in scope
 9 |     }
10 |
/host/spi-builder-workspace/.build/checkouts/synchronized/Sources/Synchronized/Lock.swift:18:9: error: cannot find 'os_unfair_lock_lock' in scope
16 |     public func locked<T>(_ block: () throws -> T) rethrows -> T {
17 |         // https://developer.apple.com/documentation/os/1646466-os_unfair_lock_lock
18 |         os_unfair_lock_lock(backing)
   |         `- error: cannot find 'os_unfair_lock_lock' in scope
19 |         defer { os_unfair_lock_unlock(backing) }
20 |         return try block()
/host/spi-builder-workspace/.build/checkouts/synchronized/Sources/Synchronized/Lock.swift:19:17: error: cannot find 'os_unfair_lock_unlock' in scope
17 |         // https://developer.apple.com/documentation/os/1646466-os_unfair_lock_lock
18 |         os_unfair_lock_lock(backing)
19 |         defer { os_unfair_lock_unlock(backing) }
   |                 `- error: cannot find 'os_unfair_lock_unlock' in scope
20 |         return try block()
21 |     }
/host/spi-builder-workspace/.build/checkouts/synchronized/Sources/Synchronized/Lock.swift:25:12: error: cannot find 'os_unfair_lock_trylock' in scope
23 |     public func tryLocked(_ block: () throws -> Void) rethrows -> Bool {
24 |         // https://developer.apple.com/documentation/os/1646469-os_unfair_lock_trylock
25 |         if os_unfair_lock_trylock(backing) {
   |            `- error: cannot find 'os_unfair_lock_trylock' in scope
26 |             defer { os_unfair_lock_unlock(backing) }
27 |             try block()
/host/spi-builder-workspace/.build/checkouts/synchronized/Sources/Synchronized/Lock.swift:26:21: error: cannot find 'os_unfair_lock_unlock' in scope
24 |         // https://developer.apple.com/documentation/os/1646469-os_unfair_lock_trylock
25 |         if os_unfair_lock_trylock(backing) {
26 |             defer { os_unfair_lock_unlock(backing) }
   |                     `- error: cannot find 'os_unfair_lock_unlock' in scope
27 |             try block()
28 |             return true
[9/9] Compiling Synchronized RecursiveLock.swift
/host/spi-builder-workspace/.build/checkouts/synchronized/Sources/Synchronized/RecursiveLock.swift:14:54: error: cannot convert value of type 'Int' to expected argument type 'Int32'
12 |         else { preconditionFailure() }
13 |
14 |         guard pthread_mutexattr_settype(&attributes, PTHREAD_MUTEX_RECURSIVE) == 0
   |                                                      `- error: cannot convert value of type 'Int' to expected argument type 'Int32'
15 |         else { preconditionFailure() }
16 |
BUILD FAILURE 6.0 linux