AsyncObservable – Build Information

Build Information

Failed to build AsyncObservable, reference main (0c7bde), with Swift 6.4 for Android on 21 Sep 2026 23:37:19 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-53886770-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:android-6.4-latest swift build --swift-sdk aarch64-unknown-linux-android28 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/meech-ward/AsyncObservable.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/meech-ward/AsyncObservable
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 0c7bdec     remove continuation manually if terminated by not being assigned
Cloned https://github.com/meech-ward/AsyncObservable.git
Revision (git rev-parse @):
0c7bdec1fb0c5341de7e463385683cb0b655f885
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/meech-ward/AsyncObservable.git at main
========================================
Build
========================================
Selected platform:         android
Swift version:             6.4
Building package at path:  $PWD
https://github.com/meech-ward/AsyncObservable.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-53886770-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:android-6.4-latest swift build --swift-sdk aarch64-unknown-linux-android28 2>&1
android-6.4-latest: Pulling from saguaro1/spi-images
Digest: sha256:abadcff584c273feba50641b454858d377ba30b35ea7287a94f45ebd8afd0ea0
Status: Image is up to date for registry.gitlab.com/saguaro1/spi-images:android-6.4-latest
Building for debugging...
[Pre-planning 9 / 124]
/host/spi-builder-workspace/Sources/AsyncObservable/StreamOf.swift:10:69: [1;33mwarning: [1;39mconformance of 'AsyncStream<Element>.Continuation.BufferingPolicy' to protocol 'Sendable' conflicts with that stated in the type's module '_Concurrency' and will be ignored; there cannot be more than one conformance, even with different conditional bounds[0;0m
 [0;36m8 |[0;0m #else
 [0;36m9 |[0;0m @available(macOS 10.15, iOS 13, tvOS 13, watchOS 6, *)
[0;36m10 |[0;0m extension AsyncStream<Any>.Continuation.BufferingPolicy: @unchecked Sendable {}
   [0;36m|[0;0m                                                                     `- [1;33mwarning: [1;39mconformance of 'AsyncStream<Element>.Continuation.BufferingPolicy' to protocol 'Sendable' conflicts with that stated in the type's module '_Concurrency' and will be ignored; there cannot be more than one conformance, even with different conditional bounds[0;0m
[0;36m11 |[0;0m #endif
[0;36m12 |[0;0m
_Concurrency.AsyncStream.Continuation.BufferingPolicy:3:47: [1;39mnote: [1;39m'AsyncStream<Element>.Continuation.BufferingPolicy' declares conformance to protocol 'Sendable' here[0;0m
[0;36m1 |[0;0m generic struct AsyncStream {
[0;36m2 |[0;0m   struct Continuation {
[0;36m3 |[0;0m public enum AsyncStream<Element>.Continuation.BufferingPolicy : Sendable {
  [0;36m|[0;0m                                               `- [1;39mnote: [1;39m'AsyncStream<Element>.Continuation.BufferingPolicy' declares conformance to protocol 'Sendable' here[0;0m
[0;36m4 |[0;0m     case unbounded
[0;36m5 |[0;0m     case bufferingOldest(Int)
[32 / 48] AsyncObservable
[40 / 51] AsyncObservableUserDefaults
swift-frontend: /home/build-user/swift/lib/Sema/TypeCheckDeclPrimary.cpp:1202: void checkInheritedDefaultValueRestrictions(ParamDecl *): Assertion `(DC->isInSwiftinterface() || PD->isImplicit()) && "explicit inherited default argument outside of a module interface?"' failed.
Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the crash backtrace.
Stack dump:
0.	Program arguments: /root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend -frontend -c -primary-file /host/spi-builder-workspace/Sources/AsyncObservableUserDefaults/AsyncObservableUserDefaults.swift -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/Objects-normal/aarch64/AsyncObservableUserDefaults.d -emit-const-values-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/Objects-normal/aarch64/AsyncObservableUserDefaults.swiftconstvalues -emit-reference-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/Objects-normal/aarch64/AsyncObservableUserDefaults.swiftdeps -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/Objects-normal/aarch64/AsyncObservableUserDefaults.dia -target aarch64-unknown-linux-android28 -Xllvm -aarch64-use-tbi -disable-objc-interop -sdk /android-ndk/android-ndk-r27d/toolchains/llvm/prebuilt/linux-x86_64/sysroot -sysroot /android-ndk/android-ndk-r27d/toolchains/llvm/prebuilt/linux-x86_64/sysroot -I /host/spi-builder-workspace/.build/out/Products/Debug-android-aarch64 -module-cache-path /host/spi-builder-workspace/.build/out/ModuleCache.noindex -color-diagnostics -Xcc -fcolor-diagnostics -enable-testing -g -debug-info-format=dwarf -dwarf-version=4 -swift-version 5 -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -D Xcode -serialize-debugging-options -enable-experimental-feature DebugDescriptionMacro -empty-abi-descriptor -external-plugin-path /root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/lib/swift/host/plugins/testing#/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-plugin-server -validate-clang-modules-once -clang-build-session-file /host/spi-builder-workspace/.build/out/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /host -resource-dir /root/.swiftpm/swift-sdks/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_android.artifactbundle/swift-android/swift-resources/usr/lib/swift-aarch64 -enable-anonymous-context-mangled-names -file-compilation-dir /host -Xcc -resource-dir -Xcc /android-ndk/android-ndk-r27d/toolchains/llvm/prebuilt/linux-x86_64/lib/clang/18 -Xcc -fno-omit-frame-pointer -Xcc -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_DEBUG -Xcc -fmodules-prune-interval=86400 -Xcc -fmodules-prune-after=345600 -Xcc -I/host/spi-builder-workspace/.build/out/Products/Debug-android-aarch64/include -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/DerivedSources-normal/aarch64 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/DerivedSources/aarch64 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG=1 -no-auto-bridging-header-chaining -module-name AsyncObservableUserDefaults -package-name spi_builder_workspace -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/Objects-normal/aarch64/AsyncObservableUserDefaults_const_extract_protocols.json -in-process-plugin-server-path /root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/lib/swift/host/libSwiftInProcPluginServer.so -plugin-path /root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/lib/swift/host/plugins -plugin-path /root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/local/lib/swift/host/plugins -parse-as-library -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/Objects-normal/aarch64/AsyncObservableUserDefaults.o -index-unit-output-path /AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/Objects-normal/aarch64/AsyncObservableUserDefaults.o -index-store-path /host/spi-builder-workspace/.build/out -index-system-modules
1.	Swift version 6.4.2-dev (LLVM 15622a86b1749a9, Swift d2e983b81b18217)
2.	Compiling with effective version 5.10
3.	While evaluating request TypeCheckPrimaryFileRequest(source_file "/host/spi-builder-workspace/Sources/AsyncObservableUserDefaults/AsyncObservableUserDefaults.swift")
4.	While evaluating request TypeCheckFunctionBodyRequest(AsyncObservableUserDefaults.(file).AsyncObservableUserDefaults.init(key:initialValue:userDefaults:serialQueue:saveImmediately:)@/host/spi-builder-workspace/Sources/AsyncObservableUserDefaults/AsyncObservableUserDefaults.swift:42:10)
5.	While type-checking statement at [/host/spi-builder-workspace/Sources/AsyncObservableUserDefaults/AsyncObservableUserDefaults.swift:48:5 - line:61:3] RangeText="{
    var _initialValue = initialValue
    self.userDefaults = userDefaults
    let data = userDefaults.data(forKey: key)
    if let data, let value = try? JSONDecoder().decode(T.self, from: data) {
      _initialValue = value
    }
    self.key = key
    super.init(_initialValue, serialQueue: serialQueue)
    if saveImmediately && data == nil {
      save(initialValue, forKey: key)
    }
  "
6.	While type-checking expression at [/host/spi-builder-workspace/Sources/AsyncObservableUserDefaults/AsyncObservableUserDefaults.swift:57:5 - line:57:55] RangeText="super.init(_initialValue, serialQueue: serialQueue"
7.	While type-checking-target starting at /host/spi-builder-workspace/Sources/AsyncObservableUserDefaults/AsyncObservableUserDefaults.swift:57:11
8.	While evaluating request DefaultArgumentTypeRequest(AsyncObservable.(file).AsyncObservable.init(_:bufferingPolicy:serialQueue:).bufferingPolicy)
9.	While evaluating request DefaultArgumentExprRequest(AsyncObservable.(file).AsyncObservable.init(_:bufferingPolicy:serialQueue:).bufferingPolicy)
 #0 0x0000621ffb7f4d98 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x8bb1d98)
 #1 0x0000621ffb7f2585 llvm::sys::RunSignalHandlers() (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x8baf585)
 #2 0x0000621ffb7f5b41 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
 #3 0x000079fe94a25520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x000079fe94a799bc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969bc)
 #5 0x000079fe94a25476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x000079fe94a0b7f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x000079fe94a0b71b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #8 0x000079fe94a1ce96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #9 0x0000621ff4e172cc swift::DefaultArgumentExprRequest::evaluate(swift::Evaluator&, swift::ParamDecl*) const (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x21d42cc)
#10 0x0000621ff559944f swift::DefaultArgumentExprRequest::OutputType swift::Evaluator::getResultUncached<swift::DefaultArgumentExprRequest, swift::DefaultArgumentExprRequest::OutputType swift::evaluateOrDefault<swift::DefaultArgumentExprRequest>(swift::Evaluator&, swift::DefaultArgumentExprRequest, swift::DefaultArgumentExprRequest::OutputType)::'lambda'()>(swift::DefaultArgumentExprRequest const&, swift::DefaultArgumentExprRequest::OutputType swift::evaluateOrDefault<swift::DefaultArgumentExprRequest>(swift::Evaluator&, swift::DefaultArgumentExprRequest, swift::DefaultArgumentExprRequest::OutputType)::'lambda'()) crtstuff.c:0:0
#11 0x0000621ff54f122b swift::ParamDecl::getTypeCheckedDefaultExpr() const (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x28ae22b)
#12 0x0000621ff4e17379 swift::DefaultArgumentTypeRequest::evaluate(swift::Evaluator&, swift::ParamDecl*) const (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x21d4379)
#13 0x0000621ff559ab0f swift::DefaultArgumentTypeRequest::OutputType swift::Evaluator::getResultUncached<swift::DefaultArgumentTypeRequest, swift::DefaultArgumentTypeRequest::OutputType swift::evaluateOrDefault<swift::DefaultArgumentTypeRequest>(swift::Evaluator&, swift::DefaultArgumentTypeRequest, swift::DefaultArgumentTypeRequest::OutputType)::'lambda'()>(swift::DefaultArgumentTypeRequest const&, swift::DefaultArgumentTypeRequest::OutputType swift::evaluateOrDefault<swift::DefaultArgumentTypeRequest>(swift::Evaluator&, swift::DefaultArgumentTypeRequest, swift::DefaultArgumentTypeRequest::OutputType)::'lambda'()) crtstuff.c:0:0
#14 0x0000621ff54f1307 swift::ParamDecl::getTypeOfDefaultExpr() const (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x28ae307)
#15 0x0000621ff4be1d37 matchCallArguments(swift::constraints::ConstraintSystem&, swift::FunctionType*, swift::ArgumentList*, llvm::ArrayRef<swift::AnyFunctionType::Param>, llvm::ArrayRef<swift::AnyFunctionType::Param>, swift::constraints::ConstraintKind, swift::constraints::ConstraintLocatorBuilder, std::optional<swift::constraints::TrailingClosureMatching>, llvm::SmallVectorImpl<std::pair<swift::TypeVariableType*, swift::ExistentialArchetypeType*>>&) CSSimplify.cpp:0:0
#16 0x0000621ff4bdfbfe swift::constraints::ConstraintSystem::simplifyApplicableFnConstraint(swift::FunctionType*, swift::Type, std::optional<swift::constraints::TrailingClosureMatching>, swift::DeclContext*, swift::optionset::OptionSet<swift::constraints::ConstraintSystem::TypeMatchFlags, unsigned int>, swift::constraints::ConstraintLocatorBuilder) (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x1f9cbfe)
#17 0x0000621ff4bcf0fe swift::constraints::ConstraintSystem::addApplicationConstraint(swift::FunctionType*, swift::Type, std::optional<swift::constraints::TrailingClosureMatching>, swift::DeclContext*, swift::constraints::ConstraintLocatorBuilder) (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x1f8c0fe)
#18 0x0000621ff4b9e23f (anonymous namespace)::ConstraintGenerator::visitApplyExpr(swift::ApplyExpr*) CSGen.cpp:0:0
#19 0x0000621ff4b8c2fa (anonymous namespace)::ConstraintWalker::walkToExprPost(swift::Expr*) CSGen.cpp:0:0
#20 0x0000621ff5440bf6 (anonymous namespace)::Traversal::doIt(swift::Expr*) ASTWalker.cpp:0:0
#21 0x0000621ff5440bc0 (anonymous namespace)::Traversal::doIt(swift::Expr*) ASTWalker.cpp:0:0
#22 0x0000621ff5440b03 swift::Expr::walk(swift::ASTWalker&) (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x27fdb03)
#23 0x0000621ff4b8765e swift::constraints::ConstraintSystem::generateConstraints(swift::Expr*, swift::DeclContext*) (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x1f4465e)
#24 0x0000621ff4b8604b swift::constraints::ConstraintSystem::generateConstraints(swift::constraints::SyntacticElementTarget&, swift::FreeTypeVariableBinding) (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x1f4304b)
#25 0x0000621ff4c08940 swift::constraints::ConstraintSystem::solveImpl(swift::constraints::SyntacticElementTarget&, swift::FreeTypeVariableBinding) (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x1fc5940)
#26 0x0000621ff4c08256 swift::constraints::ConstraintSystem::solve(swift::constraints::SyntacticElementTarget&, swift::FreeTypeVariableBinding) (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x1fc5256)
#27 0x0000621ff4dcafb5 swift::TypeChecker::typeCheckTarget(swift::constraints::SyntacticElementTarget&, swift::optionset::OptionSet<swift::TypeCheckExprFlags, unsigned int>, swift::DiagnosticTransaction*) (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x2187fb5)
#28 0x0000621ff4dcae31 swift::TypeChecker::typeCheckExpression(swift::constraints::SyntacticElementTarget&, swift::optionset::OptionSet<swift::TypeCheckExprFlags, unsigned int>, swift::DiagnosticTransaction*) (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x2187e31)
#29 0x0000621ff4dcad06 swift::TypeChecker::typeCheckExpression(swift::Expr*&, swift::DeclContext*, swift::constraints::ContextualTypeInfo, swift::optionset::OptionSet<swift::TypeCheckExprFlags, unsigned int>) (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x2187d06)
#30 0x0000621ff4ecfecb (anonymous namespace)::StmtChecker::typeCheckASTNode(swift::ASTNode&) TypeCheckStmt.cpp:0:0
#31 0x0000621ff4ed67ac swift::ASTVisitor<(anonymous namespace)::StmtChecker, void, swift::Stmt*, void, void, void, void>::visit(swift::Stmt*) TypeCheckStmt.cpp:0:0
#32 0x0000621ff4ed8ffc bool (anonymous namespace)::StmtChecker::typeCheckStmt<swift::BraceStmt>(swift::BraceStmt*&) TypeCheckStmt.cpp:0:0
#33 0x0000621ff4ed16a4 (anonymous namespace)::StmtChecker::typeCheckBody(swift::BraceStmt*&) TypeCheckStmt.cpp:0:0
#34 0x0000621ff4ed12d7 swift::TypeCheckFunctionBodyRequest::evaluate(swift::Evaluator&, swift::AbstractFunctionDecl*) const (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x228e2d7)
#35 0x0000621ff55a617e swift::TypeCheckFunctionBodyRequest::OutputType swift::Evaluator::getResultUncached<swift::TypeCheckFunctionBodyRequest, swift::TypeCheckFunctionBodyRequest::OutputType swift::evaluateOrDefault<swift::TypeCheckFunctionBodyRequest>(swift::Evaluator&, swift::TypeCheckFunctionBodyRequest, swift::TypeCheckFunctionBodyRequest::OutputType)::'lambda'()>(swift::TypeCheckFunctionBodyRequest const&, swift::TypeCheckFunctionBodyRequest::OutputType swift::evaluateOrDefault<swift::TypeCheckFunctionBodyRequest>(swift::Evaluator&, swift::TypeCheckFunctionBodyRequest, swift::TypeCheckFunctionBodyRequest::OutputType)::'lambda'()) crtstuff.c:0:0
#36 0x0000621ff54f3f99 swift::AbstractFunctionDecl::getTypecheckedBody() const (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x28b0f99)
#37 0x0000621ff568c108 swift::SourceFile::typeCheckDelayedFunctions() (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x2a49108)
#38 0x0000621ff4f5064d swift::TypeCheckPrimaryFileRequest::evaluate(swift::Evaluator&, swift::SourceFile*) const (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x230d64d)
#39 0x0000621ff4f54f0b swift::TypeCheckPrimaryFileRequest::OutputType swift::Evaluator::getResultUncached<swift::TypeCheckPrimaryFileRequest, swift::TypeCheckPrimaryFileRequest::OutputType swift::evaluateOrDefault<swift::TypeCheckPrimaryFileRequest>(swift::Evaluator&, swift::TypeCheckPrimaryFileRequest, swift::TypeCheckPrimaryFileRequest::OutputType)::'lambda'()>(swift::TypeCheckPrimaryFileRequest const&, swift::TypeCheckPrimaryFileRequest::OutputType swift::evaluateOrDefault<swift::TypeCheckPrimaryFileRequest>(swift::Evaluator&, swift::TypeCheckPrimaryFileRequest, swift::TypeCheckPrimaryFileRequest::OutputType)::'lambda'()) crtstuff.c:0:0
#40 0x0000621ff4f50498 swift::performTypeChecking(swift::SourceFile&) (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x230d498)
#41 0x0000621ff3a135f9 bool llvm::function_ref<bool (swift::SourceFile&)>::callback_fn<swift::CompilerInstance::performSema()::$_10>(long, swift::SourceFile&) Frontend.cpp:0:0
#42 0x0000621ff3a0969a swift::CompilerInstance::forEachFileToTypeCheck(llvm::function_ref<bool (swift::SourceFile&)>) (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0xdc669a)
#43 0x0000621ff3a0947b swift::CompilerInstance::performSema() (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0xdc647b)
#44 0x0000621ff3671f72 withSemanticAnalysis(swift::CompilerInstance&, swift::FrontendObserver*, llvm::function_ref<bool (swift::CompilerInstance&)>, bool) FrontendTool.cpp:0:0
#45 0x0000621ff365faa9 performCompile(swift::CompilerInstance&, int&, swift::FrontendObserver*, llvm::ArrayRef<char const*>) FrontendTool.cpp:0:0
#46 0x0000621ff365c6ee swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0xa196ee)
#47 0x0000621ff3374ba8 swift::mainEntry(int, char const**) (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x731ba8)
#48 0x000079fe94a0cd90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#49 0x000079fe94a0ce40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#50 0x0000621ff3373a65 _start (/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend+0x730a65)
*** Signal 6: Backtracing from 0x79fe94b019dd... done ***
*** Program crashed: Aborted at 0x000079fe94b019dd ***
Platform: x86_64 Linux (Ubuntu 22.04.5 LTS)
Thread 0 "swift-frontend" crashed:
0  0x000079fe94b019dd <unknown> in libc.so.6
Registers:
rax 0x0000000000000000  0
rdx 0x0000000000000006  6
rcx 0x000079fe94b019dd  48 3d 01 f0 ff ff 73 01 c3 48 8b 0d 23 b4 0f 00  H=·ðÿÿs·ÃH··#´··
rbx 0x0000000000000006  6
rsi 0x00000000000000d5  213
rdi 0x00000000000000d5  213
rbp 0x00000000000000d5  213
rsp 0x000062201c793128  6b 5b 7f fb 1f 62 00 00 b0 33 79 1c 20 62 00 00  k[·û·b··°3y· b··
 r8 0x000062201c7933b0  06 00 00 00 00 00 00 00 fa ff ff ff 00 00 00 00  ········úÿÿÿ····
 r9 0x000062201c7933b0  06 00 00 00 00 00 00 00 fa ff ff ff 00 00 00 00  ········úÿÿÿ····
r10 0x000062201c7933b0  06 00 00 00 00 00 00 00 fa ff ff ff 00 00 00 00  ········úÿÿÿ····
r11 0x0000000000000246  582
r12 0x0000000000000006  6
r13 0x0000000000000016  22
r14 0x0000000000000000  0
r15 0x000062201c7931c8  ff ff ff 7f fe ff ff ff 00 00 00 00 00 00 00 00  ÿÿÿ·þÿÿÿ········
rip 0x000079fe94b019dd  48 3d 01 f0 ff ff 73 01 c3 48 8b 0d 23 b4 0f 00  H=·ðÿÿs·ÃH··#´··
rflags 0x0000000000000246  ZF PF
cs 0x0033  fs 0x0000  gs 0x0000
Images (109 omitted):
0x000079fe949e3000–0x000079fe94b9f401 6a6cb5a80fd5e5bb5bf3aeaa111add98e88843a5 libc.so.6 /usr/lib/x86_64-linux-gnu/libc.so.6
Backtrace took 0.01s
Failed frontend command:
/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-frontend -frontend -c -primary-file /host/spi-builder-workspace/Sources/AsyncObservableUserDefaults/AsyncObservableUserDefaults.swift -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/Objects-normal/aarch64/AsyncObservableUserDefaults.d -emit-const-values-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/Objects-normal/aarch64/AsyncObservableUserDefaults.swiftconstvalues -emit-reference-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/Objects-normal/aarch64/AsyncObservableUserDefaults.swiftdeps -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/Objects-normal/aarch64/AsyncObservableUserDefaults.dia -target aarch64-unknown-linux-android28 -Xllvm -aarch64-use-tbi -disable-objc-interop -sdk /android-ndk/android-ndk-r27d/toolchains/llvm/prebuilt/linux-x86_64/sysroot -sysroot /android-ndk/android-ndk-r27d/toolchains/llvm/prebuilt/linux-x86_64/sysroot -I /host/spi-builder-workspace/.build/out/Products/Debug-android-aarch64 -module-cache-path /host/spi-builder-workspace/.build/out/ModuleCache.noindex -color-diagnostics -Xcc -fcolor-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=4 -swift-version 5 -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -D Xcode -serialize-debugging-options -enable-experimental-feature DebugDescriptionMacro -empty-abi-descriptor -external-plugin-path /root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/lib/swift/host/plugins/testing\#/root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/bin/swift-plugin-server -validate-clang-modules-once -clang-build-session-file /host/spi-builder-workspace/.build/out/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /host -resource-dir /root/.swiftpm/swift-sdks/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_android.artifactbundle/swift-android/swift-resources/usr/lib/swift-aarch64 -enable-anonymous-context-mangled-names -file-compilation-dir /host -Xcc -resource-dir -Xcc /android-ndk/android-ndk-r27d/toolchains/llvm/prebuilt/linux-x86_64/lib/clang/18 -Xcc -fno-omit-frame-pointer -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -Xcc -fmodules-prune-interval\=86400 -Xcc -fmodules-prune-after\=345600 -Xcc -I/host/spi-builder-workspace/.build/out/Products/Debug-android-aarch64/include -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/DerivedSources-normal/aarch64 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/DerivedSources/aarch64 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name AsyncObservableUserDefaults -package-name spi_builder_workspace -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/Objects-normal/aarch64/AsyncObservableUserDefaults_const_extract_protocols.json -in-process-plugin-server-path /root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/lib/swift/host/libSwiftInProcPluginServer.so -plugin-path /root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/lib/swift/host/plugins -plugin-path /root/.local/share/swiftly/toolchains/6.4.x-snapshot-2026-09-04/usr/local/lib/swift/host/plugins -parse-as-library -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/Objects-normal/aarch64/AsyncObservableUserDefaults.o -index-unit-output-path /AsyncObservable.build/Debug-android-aarch64/AsyncObservableUserDefaults-t.build/Objects-normal/aarch64/AsyncObservableUserDefaults.o -index-store-path /host/spi-builder-workspace/.build/out -index-system-modules
error: Build failed
BUILD FAILURE 6.4 android