Swift Package IndexBuild Information
Failed to build Observable, reference main (8634c9), with Swift 6.2 (beta) for Linux on 19 Jun 2025 16:51:41 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-4609320-3":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.2-latest swift build --triple x86_64-unknown-linux-gnu 2>&1Build Log
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RunAll
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Builder version: 4.64.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/Flowduino/Observable.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/Flowduino/Observable
* branch main -> FETCH_HEAD
* [new branch] main -> origin/main
HEAD is now at 8634c9d Update FUNDING.yml
Cloned https://github.com/Flowduino/Observable.git
Revision (git rev-parse @):
8634c9d72b50763a6d66879fafa2cdd0345fce17
SUCCESS checkout https://github.com/Flowduino/Observable.git at main
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Build
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Selected platform: linux
Swift version: 6.2
Building package at path: $PWD
https://github.com/Flowduino/Observable.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-3":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.2-latest swift build --triple x86_64-unknown-linux-gnu 2>&1
basic-6.2-latest: Pulling from finestructure/spi-images
Digest: sha256:f81a7bd7aa87a0f81848d48c5bcc03f5f78deebd37fa5f9be9913077205d3687
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.2-latest
Fetching https://github.com/Flowduino/ThreadSafeSwift.git
[1/53] Fetching threadsafeswift
Fetched https://github.com/Flowduino/ThreadSafeSwift.git from cache (0.19s)
Computing version for https://github.com/Flowduino/ThreadSafeSwift.git
Computed https://github.com/Flowduino/ThreadSafeSwift.git at 1.1.0 (0.58s)
Creating working copy for https://github.com/Flowduino/ThreadSafeSwift.git
Working copy of https://github.com/Flowduino/ThreadSafeSwift.git resolved at 1.1.0
Building for debugging...
[0/3] Write sources
[2/3] Write swift-version-24593BA9C3E375BF.txt
[4/5] Emitting module ThreadSafeSwift
[5/5] Compiling ThreadSafeSwift ThreadSafeSemaphore.swift
[7/14] Compiling Observable ObservableClass.swift
/host/spi-builder-workspace/Sources/Observable/ObservableClass.swift:20:41: error: cannot find type 'ObservableObject' in scope
18 | */
19 | @available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
20 | open class ObservableClass: Observable, ObservableObject {
| `- error: cannot find type 'ObservableObject' in scope
21 | /**
22 | Contains a Weak Reference to an Observer.
[8/14] Compiling Observable ObservableThread.swift
/host/spi-builder-workspace/Sources/Observable/ObservableThread.swift:20:12: error: cannot inherit from class 'Thread' (compiled with Swift 6.2) because it has overridable members that could not be loaded in Swift 5.10
18 | */
19 | @available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
20 | open class ObservableThread: Thread, Observable, ObservableObject {
| `- error: cannot inherit from class 'Thread' (compiled with Swift 6.2) because it has overridable members that could not be loaded in Swift 5.10
21 | /**
22 | Contains a Weak Reference to an Observer.
/host/spi-builder-workspace/Sources/Observable/ObservableThread.swift:20:50: error: cannot find type 'ObservableObject' in scope
18 | */
19 | @available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
20 | open class ObservableThread: Thread, Observable, ObservableObject {
| `- error: cannot find type 'ObservableObject' in scope
21 | /**
22 | Contains a Weak Reference to an Observer.
/host/spi-builder-workspace/Sources/Observable/ObservableThread.swift:140:13: error: cannot find 'objectWillChange' in scope
138 | open func notifyChange() async {
139 | await MainActor.run {
140 | objectWillChange.send()
| `- error: cannot find 'objectWillChange' in scope
141 | }
142 | }
[9/15] Compiling Observable Observable.swift
[10/15] Compiling Observable ObservableThreadSafeClass.swift
/host/spi-builder-workspace/Sources/Observable/ObservableThreadSafeClass.swift:20:51: error: cannot find type 'ObservableObject' in scope
18 | */
19 | @available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
20 | open class ObservableThreadSafeClass: Observable, ObservableObject {
| `- error: cannot find type 'ObservableObject' in scope
21 | /**
22 | Contains a Weak Reference to an Observer.
/host/spi-builder-workspace/Sources/Observable/ObservableThreadSafeClass.swift:140:13: error: cannot find 'objectWillChange' in scope
138 | open func notifyChange() async {
139 | await MainActor.run {
140 | objectWillChange.send()
| `- error: cannot find 'objectWillChange' in scope
141 | }
142 | }
error: emit-module command failed with exit code 1 (use -v to see invocation)
[11/15] Emitting module Observable
/host/spi-builder-workspace/Sources/Observable/ObservableClass.swift:20:41: error: cannot find type 'ObservableObject' in scope
18 | */
19 | @available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
20 | open class ObservableClass: Observable, ObservableObject {
| `- error: cannot find type 'ObservableObject' in scope
21 | /**
22 | Contains a Weak Reference to an Observer.
/host/spi-builder-workspace/Sources/Observable/ObservableThread.swift:20:12: error: cannot inherit from class 'Thread' (compiled with Swift 6.2) because it has overridable members that could not be loaded in Swift 5.10
18 | */
19 | @available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
20 | open class ObservableThread: Thread, Observable, ObservableObject {
| `- error: cannot inherit from class 'Thread' (compiled with Swift 6.2) because it has overridable members that could not be loaded in Swift 5.10
21 | /**
22 | Contains a Weak Reference to an Observer.
/host/spi-builder-workspace/Sources/Observable/ObservableThread.swift:20:50: error: cannot find type 'ObservableObject' in scope
18 | */
19 | @available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
20 | open class ObservableThread: Thread, Observable, ObservableObject {
| `- error: cannot find type 'ObservableObject' in scope
21 | /**
22 | Contains a Weak Reference to an Observer.
/host/spi-builder-workspace/Sources/Observable/ObservableThreadSafeClass.swift:20:51: error: cannot find type 'ObservableObject' in scope
18 | */
19 | @available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
20 | open class ObservableThreadSafeClass: Observable, ObservableObject {
| `- error: cannot find type 'ObservableObject' in scope
21 | /**
22 | Contains a Weak Reference to an Observer.
[12/15] Compiling Observable KeyedObservableClass.swift
error: compile command failed due to signal 6 (use -v to see invocation)
[13/15] Compiling Observable KeyedObservable.swift
[14/15] Compiling Observable KeyedObservableThreadSafeClass.swift
swift-frontend: /home/build-user/swift/lib/SILGen/SILGenType.cpp:319: void (anonymous namespace)::SILGenVTableBase<(anonymous namespace)::SILGenVTable>::addPlaceholder(MissingMemberDecl *) [T = (anonymous namespace)::SILGenVTable]: Assertion `isResilient || m->getNumberOfVTableEntries() == 0 && "Should not be emitting fragile class with missing members"' failed.
Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the crash backtrace.
Stack dump:
0. Program arguments: /usr/bin/swift-frontend -frontend -c /host/spi-builder-workspace/Sources/Observable/Keyed/KeyedObservable.swift /host/spi-builder-workspace/Sources/Observable/Keyed/KeyedObservableClass.swift -primary-file /host/spi-builder-workspace/Sources/Observable/Keyed/KeyedObservableThread.swift /host/spi-builder-workspace/Sources/Observable/Keyed/KeyedObservableThreadSafeClass.swift /host/spi-builder-workspace/Sources/Observable/Observable.swift /host/spi-builder-workspace/Sources/Observable/ObservableClass.swift /host/spi-builder-workspace/Sources/Observable/ObservableThread.swift /host/spi-builder-workspace/Sources/Observable/ObservableThreadSafeClass.swift -emit-dependencies-path /host/spi-builder-workspace/.build/x86_64-unknown-linux-gnu/debug/Observable.build/KeyedObservableThread.d -emit-reference-dependencies-path /host/spi-builder-workspace/.build/x86_64-unknown-linux-gnu/debug/Observable.build/KeyedObservableThread.swiftdeps -serialize-diagnostics-path /host/spi-builder-workspace/.build/x86_64-unknown-linux-gnu/debug/Observable.build/KeyedObservableThread.dia -target x86_64-unknown-linux-gnu -disable-objc-interop -I /host/spi-builder-workspace/.build/x86_64-unknown-linux-gnu/debug/Modules -no-color-diagnostics -Xcc -fno-color-diagnostics -enable-testing -g -debug-info-format=dwarf -dwarf-version=4 -module-cache-path /host/spi-builder-workspace/.build/x86_64-unknown-linux-gnu/debug/ModuleCache -swift-version 5 -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -empty-abi-descriptor -enable-anonymous-context-mangled-names -file-compilation-dir /host/spi-builder-workspace -Xcc -g -Xcc -fno-omit-frame-pointer -no-auto-bridging-header-chaining -module-name Observable -in-process-plugin-server-path /usr/lib/swift/host/libSwiftInProcPluginServer.so -plugin-path /usr/lib/swift/host/plugins -plugin-path /usr/local/lib/swift/host/plugins -parse-as-library -o /host/spi-builder-workspace/.build/x86_64-unknown-linux-gnu/debug/Observable.build/KeyedObservableThread.swift.o -index-store-path /host/spi-builder-workspace/.build/x86_64-unknown-linux-gnu/debug/index/store -index-system-modules
1. Swift version 6.2-dev (LLVM 0d47fa0a0fd41fb, Swift 536aa932a9e0ea3)
2. Compiling with effective version 5.10
3. While evaluating request ASTLoweringRequest(Lowering AST to SIL for file "/host/spi-builder-workspace/Sources/Observable/Keyed/KeyedObservableThread.swift")
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
0 swift-frontend 0x000055f34873e918
1 swift-frontend 0x000055f34873c43e
2 swift-frontend 0x000055f34873efb1
3 libc.so.6 0x00007f477fd63520
4 libc.so.6 0x00007f477fdb79fc pthread_kill + 300
5 libc.so.6 0x00007f477fd63476 raise + 22
6 libc.so.6 0x00007f477fd497f3 abort + 211
7 libc.so.6 0x00007f477fd4971b
8 libc.so.6 0x00007f477fd5ae96
9 swift-frontend 0x000055f341428cac
10 swift-frontend 0x000055f341428ae6
11 swift-frontend 0x000055f341428ae6
12 swift-frontend 0x000055f341423ebd
13 swift-frontend 0x000055f341423aa8
14 swift-frontend 0x000055f3412f6853
15 swift-frontend 0x000055f3412f6fa4
16 swift-frontend 0x000055f3414098c6
17 swift-frontend 0x000055f3412fbf53
18 swift-frontend 0x000055f3412f792f
19 swift-frontend 0x000055f340ad6808
20 swift-frontend 0x000055f340ae842a
21 swift-frontend 0x000055f340ad97de
22 swift-frontend 0x000055f340ad8878
23 swift-frontend 0x000055f34085426b
24 libc.so.6 0x00007f477fd4ad90
25 libc.so.6 0x00007f477fd4ae40 __libc_start_main + 128
26 swift-frontend 0x000055f340853265
BUILD FAILURE 6.2 linux