Swift Package IndexBuild Information
Failed to build swift-function-composition, reference main (7ce362), with Swift 6.4 for Linux on 27 Sep 2026 18:42:27 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:basic-6.4-latest swift build --triple x86_64-unknown-linux-gnu 2>&1Build Log
========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/capturecontext/swift-function-composition.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:
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From https://github.com/capturecontext/swift-function-composition
* branch main -> FETCH_HEAD
* [new branch] main -> origin/main
HEAD is now at 7ce3628 ci: update shared actions
Cloned https://github.com/capturecontext/swift-function-composition.git
Revision (git rev-parse @):
7ce3628c42a02b2bfe9fe04406dfc4e83b6ea790
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/capturecontext/swift-function-composition.git at main
========================================
Build
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Selected platform: linux
Swift version: 6.4
Building package at path: $PWD
https://github.com/capturecontext/swift-function-composition.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-53886770-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:basic-6.4-latest swift build --triple x86_64-unknown-linux-gnu 2>&1
basic-6.4-latest: Pulling from saguaro1/spi-images
Digest: sha256:c77fcce225e223ac0fafed844619173fc6de8d62dd560eeb28db3182af6a282b
Status: Image is up to date for registry.gitlab.com/saguaro1/spi-images:basic-6.4-latest
Fetching https://github.com/pointfreeco/swift-concurrency-extras.git
[1/1058] Fetching swift-concurrency-extras
Fetched https://github.com/pointfreeco/swift-concurrency-extras.git (0.48s)
Computing version for https://github.com/pointfreeco/swift-concurrency-extras.git
Computed https://github.com/pointfreeco/swift-concurrency-extras.git at 1.4.1 (0.69s)
Creating working copy for https://github.com/pointfreeco/swift-concurrency-extras.git
Working copy of https://github.com/pointfreeco/swift-concurrency-extras.git resolved at 1.4.1
Building for debugging...
[Computing dependencies]
[Pre-planning 1 / 589]
[Constructing 4 / 1173]
[92 / 178] FunctionComposition
[102 / 202] Either
[120 / 202] _Currying
[130 / 202] ConcurrencyExtras
[131 / 202] _Currying
[143 / 204] FunctionCompositionOperators
[150 / 206] _Currying
[153 / 206] ConcurrencyExtras-product
[156 / 206] FunctionCompositionOperators
[165 / 216] NominalFunctionTypes
[166 / 217] _Tuples
[169 / 217] NominalFunctionTypes
[177 / 217] NominalFunctionTypesCompositionOperators
swift-frontend: /home/build-user/swift/include/swift/AST/Types.h:5374: SILResultInfo &swift::SILFunctionType::getMutableErrorResult(): Assertion `hasErrorResult()' 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/NominalFunctionTypes/Async/AsyncFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/Async/MainActorAsyncFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/Async/SendableAsyncFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/AsyncThrowing/AsyncThrowingFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/AsyncThrowing/MainActorAsyncThrowingFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/AsyncThrowing/SendableAsyncThrowingFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/Exports.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/Sync/MainActorSyncFunc.swift -primary-file /host/spi-builder-workspace/Sources/NominalFunctionTypes/Sync/SendableSyncFunc.swift -primary-file /host/spi-builder-workspace/Sources/NominalFunctionTypes/Sync/SyncFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/SyncThrowing/MainActorSyncThrowingFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/SyncThrowing/SendableSyncThrowingFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/SyncThrowing/SyncThrowingFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/_AnyNominalFunctionType.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/_MainActorMarkers.swift -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SendableSyncFunc.d -emit-const-values-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SendableSyncFunc.swiftconstvalues -emit-reference-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SendableSyncFunc.swiftdeps -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SendableSyncFunc.dia -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SyncFunc.d -emit-const-values-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SyncFunc.swiftconstvalues -emit-reference-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SyncFunc.swiftdeps -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SyncFunc.dia -target x86_64-unknown-linux-gnu -disable-objc-interop -I /host/spi-builder-workspace/.build/out/Products/Debug-linux-x86_64 -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 6 -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 /usr/lib/swift/host/plugins/testing#/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 -enable-anonymous-context-mangled-names -file-compilation-dir /host -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-linux-x86_64/include -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/DerivedSources-normal/x86_64 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/DerivedSources/x86_64 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG=1 -no-auto-bridging-header-chaining -module-name NominalFunctionTypes -package-name spi_builder_workspace -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/NominalFunctionTypes_const_extract_protocols.json -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/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SendableSyncFunc.o -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SyncFunc.o -index-unit-output-path /swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SendableSyncFunc.o -index-unit-output-path /swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SyncFunc.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 the current language version
3. While evaluating request IRGenRequest(IR Generation for file "/host/spi-builder-workspace/Sources/NominalFunctionTypes/Sync/SyncFunc.swift")
4. While emitting IR SIL function "@$s20NominalFunctionTypes04SyncB0PAAE3run4with6OutputQz5InputQz_tF".
for 'run(with:)' (at /host/spi-builder-workspace/Sources/NominalFunctionTypes/Sync/SyncFunc.swift:23:9)
#0 0x000056b57ede6d98 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/bin/swift-frontend+0x8bb1d98)
#1 0x000056b57ede4585 llvm::sys::RunSignalHandlers() (/usr/bin/swift-frontend+0x8baf585)
#2 0x000056b57ede7b41 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#3 0x00007b2f54349520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x00007b2f5439d9bc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969bc)
#5 0x00007b2f54349476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x00007b2f5432f7f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x00007b2f5432f71b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#8 0x00007b2f54340e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#9 0x000056b57746e393 (/usr/bin/swift-frontend+0x1239393)
#10 0x000056b577453fcc (anonymous namespace)::IRGenSILFunction::visitSILBasicBlock(swift::SILBasicBlock*) IRGenSIL.cpp:0:0
#11 0x000056b57744ebfc (anonymous namespace)::IRGenSILFunction::emitSILFunction() IRGenSIL.cpp:0:0
#12 0x000056b57744baf3 swift::irgen::IRGenModule::emitSILFunction(swift::SILFunction*) (/usr/bin/swift-frontend+0x1216af3)
#13 0x000056b5772dee12 swift::irgen::IRGenerator::emitGlobalTopLevel(std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>>> const&) (/usr/bin/swift-frontend+0x10a9e12)
#14 0x000056b57714a0cc swift::IRGenRequest::evaluate(swift::Evaluator&, swift::IRGenDescriptor) const (/usr/bin/swift-frontend+0xf150cc)
#15 0x000056b5771c00e2 swift::GeneratedModule swift::SimpleRequest<swift::IRGenRequest, swift::GeneratedModule (swift::IRGenDescriptor), (swift::RequestFlags)17>::callDerived<0ul>(swift::Evaluator&, std::integer_sequence<unsigned long, 0ul>) const crtstuff.c:0:0
#16 0x000056b5771bffb9 swift::SimpleRequest<swift::IRGenRequest, swift::GeneratedModule (swift::IRGenDescriptor), (swift::RequestFlags)17>::evaluateRequest(swift::IRGenRequest const&, swift::Evaluator&) crtstuff.c:0:0
#17 0x000056b57699003c swift::IRGenRequest::OutputType swift::Evaluator::getResultUncached<swift::IRGenRequest, swift::IRGenRequest::OutputType swift::evaluateOrFatal<swift::IRGenRequest>(swift::Evaluator&, swift::IRGenRequest)::'lambda'()>(swift::IRGenRequest const&, swift::IRGenRequest::OutputType swift::evaluateOrFatal<swift::IRGenRequest>(swift::Evaluator&, swift::IRGenRequest)::'lambda'()) crtstuff.c:0:0
#18 0x000056b57714df3d swift::performIRGeneration(swift::FileUnit*, swift::IRGenOptions const&, swift::TBDGenOptions const&, std::unique_ptr<swift::SILModule, std::default_delete<swift::SILModule>>, llvm::StringRef, swift::PrimarySpecificPaths const&, std::shared_ptr<llvm::cas::ObjectStore>, llvm::StringRef, llvm::GlobalVariable**, swift::cas::SwiftCASOutputBackend*, std::optional<llvm::cas::ObjectRef>) (/usr/bin/swift-frontend+0xf18f3d)
#19 0x000056b576c54e15 generateIR(swift::IRGenOptions const&, swift::TBDGenOptions const&, std::unique_ptr<swift::SILModule, std::default_delete<swift::SILModule>>, swift::PrimarySpecificPaths const&, std::shared_ptr<llvm::cas::ObjectStore>, swift::cas::SwiftCASOutputBackend*, llvm::StringRef, llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>, llvm::GlobalVariable*&, llvm::ArrayRef<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>>, llvm::ArrayRef<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>>, std::optional<llvm::cas::ObjectRef>) FrontendTool.cpp:0:0
#20 0x000056b576c4d86f performCompileStepsPostSILGen(swift::CompilerInstance&, std::unique_ptr<swift::SILModule, std::default_delete<swift::SILModule>>, llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>, swift::PrimarySpecificPaths const&, int&, swift::FrontendObserver*, llvm::ArrayRef<char const*>, llvm::ArrayRef<swift::PrimarySpecificPaths>) FrontendTool.cpp:0:0
#21 0x000056b576c4bc4f swift::performCompileStepsPostSema(swift::CompilerInstance&, int&, swift::FrontendObserver*, llvm::ArrayRef<char const*>) (/usr/bin/swift-frontend+0xa16c4f)
#22 0x000056b576c63fda withSemanticAnalysis(swift::CompilerInstance&, swift::FrontendObserver*, llvm::function_ref<bool (swift::CompilerInstance&)>, bool) FrontendTool.cpp:0:0
#23 0x000056b576c51aa9 performCompile(swift::CompilerInstance&, int&, swift::FrontendObserver*, llvm::ArrayRef<char const*>) FrontendTool.cpp:0:0
#24 0x000056b576c4e6ee swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) (/usr/bin/swift-frontend+0xa196ee)
#25 0x000056b576966ba8 swift::mainEntry(int, char const**) (/usr/bin/swift-frontend+0x731ba8)
#26 0x00007b2f54330d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#27 0x00007b2f54330e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#28 0x000056b576965a65 _start (/usr/bin/swift-frontend+0x730a65)
*** Signal 6: Backtracing from 0x7b2f544259dd... done ***
*** Program crashed: Aborted at 0x00007b2f544259dd ***
Platform: x86_64 Linux (Ubuntu 22.04.5 LTS)
Thread 0 "swift-frontend" crashed:
0 0x00007b2f544259dd <unknown> in libc.so.6
Registers:
rax 0x0000000000000000 0
rdx 0x0000000000000006 6
rcx 0x00007b2f544259dd 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d 23 b4 0f 00 H=·ðÿÿs·ÃH··#´··
rbx 0x0000000000000006 6
rsi 0x000000000000014e 334
rdi 0x000000000000014e 334
rbp 0x000000000000014e 334
rsp 0x000056b5a7822068 6b 7b de 7e b5 56 00 00 f0 22 82 a7 b5 56 00 00 k{Þ~µV··ð"·§µV··
r8 0x000056b5a78222f0 06 00 00 00 00 00 00 00 fa ff ff ff 00 00 00 00 ········úÿÿÿ····
r9 0x000056b5a78222f0 06 00 00 00 00 00 00 00 fa ff ff ff 00 00 00 00 ········úÿÿÿ····
r10 0x000056b5a78222f0 06 00 00 00 00 00 00 00 fa ff ff ff 00 00 00 00 ········úÿÿÿ····
r11 0x0000000000000246 582
r12 0x0000000000000000 0
r13 0x0000000000000000 0
r14 0x0000000000000000 0
r15 0x000056b5a7822078 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ················
rip 0x00007b2f544259dd 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 (37 omitted):
0x00007b2f54307000–0x00007b2f544c3401 6a6cb5a80fd5e5bb5bf3aeaa111add98e88843a5 libc.so.6 /usr/lib/x86_64-linux-gnu/libc.so.6
Backtrace took 0.01s
Failed frontend command:
/usr/bin/swift-frontend -frontend -c /host/spi-builder-workspace/Sources/NominalFunctionTypes/Async/AsyncFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/Async/MainActorAsyncFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/Async/SendableAsyncFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/AsyncThrowing/AsyncThrowingFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/AsyncThrowing/MainActorAsyncThrowingFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/AsyncThrowing/SendableAsyncThrowingFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/Exports.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/Sync/MainActorSyncFunc.swift -primary-file /host/spi-builder-workspace/Sources/NominalFunctionTypes/Sync/SendableSyncFunc.swift -primary-file /host/spi-builder-workspace/Sources/NominalFunctionTypes/Sync/SyncFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/SyncThrowing/MainActorSyncThrowingFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/SyncThrowing/SendableSyncThrowingFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/SyncThrowing/SyncThrowingFunc.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/_AnyNominalFunctionType.swift /host/spi-builder-workspace/Sources/NominalFunctionTypes/_MainActorMarkers.swift -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SendableSyncFunc.d -emit-const-values-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SendableSyncFunc.swiftconstvalues -emit-reference-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SendableSyncFunc.swiftdeps -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SendableSyncFunc.dia -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SyncFunc.d -emit-const-values-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SyncFunc.swiftconstvalues -emit-reference-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SyncFunc.swiftdeps -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SyncFunc.dia -target x86_64-unknown-linux-gnu -disable-objc-interop -I /host/spi-builder-workspace/.build/out/Products/Debug-linux-x86_64 -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 6 -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 /usr/lib/swift/host/plugins/testing\#/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 -enable-anonymous-context-mangled-names -file-compilation-dir /host -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-linux-x86_64/include -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/DerivedSources-normal/x86_64 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/DerivedSources/x86_64 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name NominalFunctionTypes -package-name spi_builder_workspace -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/NominalFunctionTypes_const_extract_protocols.json -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/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SendableSyncFunc.o -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SyncFunc.o -index-unit-output-path /swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SendableSyncFunc.o -index-unit-output-path /swift-function-composition.build/Debug-linux-x86_64/NominalFunctionTypes-t.build/Objects-normal/x86_64/SyncFunc.o -index-store-path /host/spi-builder-workspace/.build/out -index-system-modules
error: Build failed
BUILD FAILURE 6.4 linux