[SR-11232] Function return type does not match operand type of return inst!

[swift-ci]

Previous ID	SR-11232
Radar	rdar://problem/53712386
Original Reporter	minuscorp (JIRA User)
Type	Bug
Status	Resolved
Resolution	Done

Attachment: Download

Environment

Apple Swift version 5.1 (swiftlang-1100.0.266.1 clang-1100.0.32.1)
Target: x86_64-apple-darwin19.0.0

Xcode 11 Beta 5

Software:

System Software Overview:

System Version: macOS 10.15 (19A512f)
Kernel Version: Darwin 19.0.0
Boot Volume: Macintosh HD
Boot Mode: Normal
Computer Name: MacBook Pro de Jorge
User Name: Jorge Revuelta (minuscorp)
Secure Virtual Memory: Enabled
System Integrity Protection: Enabled
Time since boot: 2:16

Additional Detail from JIRA

Votes	0
Component/s	Compiler
Labels	Bug, CompilerCrash
Assignee	None
Priority	Medium

md5: 4b96fd23131015f63a36e5634c49301f

Issue Description:

Maybe the title is not the best, but I don't know how to describe the error as it seems very concrete.

 ret %T7Combine16PublisherBoxBaseC.165* %102, !dbg !132
 %T7Combine16PublisherBoxBaseC*in function $s7Combine9PublisherP9MiniSwiftAA16ObservableObject6OutputRpzAD9StoreTypeAGRQAA19CurrentValueSubjectCyAF_5StateAdHPQZs5Error_pGAF_0f10WillChangeB0AaEPRCzrlE8dispatch5using7factory7taskMap2on8lifetimeAA03AnyB0VyAMs5NeverOGAD10DispatcherC_qd__yXAqd_0_SgAMcAgD9TypedTaskCADypRszlE8LifetimeOyyp_GtAD6ActionRd__A6_yypGRbd_0_r0_lFZ
<unknown>:0: error: fatal error encountered during compilation; please file a bug report with your project and the crash log
<unknown>:0: note: Broken function found, compilation aborted!
Stack dump:
0.  Program arguments: /Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift -frontend -c /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Action.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/ActionReducer.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Dispatcher.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Middleware.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/ReducerGroup.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Service.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/State.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Store.swift -primary-file /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Task.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Utils/Atomic.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Utils/AtomicState.swift -primary-file /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Utils/Combine/Cancellable+Extensions.swift -primary-file /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Utils/Combine/Create.swift -primary-file /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Utils/Combine/Dispatch.swift -primary-file /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Utils/Combine/FilterOne.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Utils/Combine/Publisher+Extensions.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Utils/DelayedImmutable.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Utils/DispatchQueue+Extensions.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Utils/Foundation/Dictionary+Extensions.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Utils/Foundation/String+Extensions.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Utils/Middlewares/TestMiddleware.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Utils/OrderedSet.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Utils/PayloadAction.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Utils/Services/LoggingService.swift /Users/minuscorp/Documents/GitHub/mini-swift-1/Sources/MiniSwift/Utils/SharedDictionary.swift -supplementary-output-file-map /var/folders/n4/zbkl28756wj08660vtf58qz80000gn/T/supplementaryOutputs-1a9408 -target x86_64-apple-macos10.15 -enable-objc-interop -sdk /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -I /Users/minuscorp/Library/Developer/Xcode/DerivedData/mini-swift-1-fkeadwieujcrglekkmmhzwbltgrx/Build/Products/Debug -F /Users/minuscorp/Library/Developer/Xcode/DerivedData/mini-swift-1-fkeadwieujcrglekkmmhzwbltgrx/Build/Products/Debug -F /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks -enable-testing -g -module-cache-path /Users/minuscorp/Library/Developer/Xcode/DerivedData/ModuleCache.noindex -swift-version 5 -enforce-exclusivity=checked -Onone -D SWIFT_PACKAGE -D DEBUG -D Xcode -serialize-debugging-options -Xcc -working-directory -Xcc /Users/minuscorp/Documents/GitHub/mini-swift-1 -enable-anonymous-context-mangled-names -Xcc -I/Users/minuscorp/Library/Developer/Xcode/DerivedData/mini-swift-1-fkeadwieujcrglekkmmhzwbltgrx/Build/Products/Debug/include -Xcc -I/Users/minuscorp/Library/Developer/Xcode/DerivedData/mini-swift-1-fkeadwieujcrglekkmmhzwbltgrx/Build/Intermediates.noindex/MiniSwift.build/Debug/MiniSwift.build/DerivedSources-normal/x86_64 -Xcc -I/Users/minuscorp/Library/Developer/Xcode/DerivedData/mini-swift-1-fkeadwieujcrglekkmmhzwbltgrx/Build/Intermediates.noindex/MiniSwift.build/Debug/MiniSwift.build/DerivedSources/x86_64 -Xcc -I/Users/minuscorp/Library/Developer/Xcode/DerivedData/mini-swift-1-fkeadwieujcrglekkmmhzwbltgrx/Build/Intermediates.noindex/MiniSwift.build/Debug/MiniSwift.build/DerivedSources -Xcc -DDEBUG=1 -module-name MiniSwift -o /Users/minuscorp/Library/Developer/Xcode/DerivedData/mini-swift-1-fkeadwieujcrglekkmmhzwbltgrx/Build/Intermediates.noindex/MiniSwift.build/Debug/MiniSwift.build/Objects-normal/x86_64/Task.o -o /Users/minuscorp/Library/Developer/Xcode/DerivedData/mini-swift-1-fkeadwieujcrglekkmmhzwbltgrx/Build/Intermediates.noindex/MiniSwift.build/Debug/MiniSwift.build/Objects-normal/x86_64/Cancellable+Extensions.o -o /Users/minuscorp/Library/Developer/Xcode/DerivedData/mini-swift-1-fkeadwieujcrglekkmmhzwbltgrx/Build/Intermediates.noindex/MiniSwift.build/Debug/MiniSwift.build/Objects-normal/x86_64/Create.o -o /Users/minuscorp/Library/Developer/Xcode/DerivedData/mini-swift-1-fkeadwieujcrglekkmmhzwbltgrx/Build/Intermediates.noindex/MiniSwift.build/Debug/MiniSwift.build/Objects-normal/x86_64/Dispatch.o -o /Users/minuscorp/Library/Developer/Xcode/DerivedData/mini-swift-1-fkeadwieujcrglekkmmhzwbltgrx/Build/Intermediates.noindex/MiniSwift.build/Debug/MiniSwift.build/Objects-normal/x86_64/FilterOne.o -index-store-path /Users/minuscorp/Library/Developer/Xcode/DerivedData/mini-swift-1-fkeadwieujcrglekkmmhzwbltgrx/Index/DataStore -index-system-modules 
1.  Running pass 'Module Verifier' on function '@"$s7Combine9PublisherP9MiniSwiftAA16ObservableObject6OutputRpzAD9StoreTypeAGRQAA19CurrentValueSubjectCyAF_5StateAdHPQZs5Error_pGAF_0f10WillChangeB0AaEPRCzrlE8dispatch5using7factory7taskMap2on8lifetimeAA03AnyB0VyAMs5NeverOGAD10DispatcherC_qd__yXAqd_0_SgAMcAgD9TypedTaskCADypRszlE8LifetimeOyyp_GtAD6ActionRd__A6_yypGRbd_0_r0_lFZ"'
0  swift                    0x000000010f8090e3 PrintStackTraceSignalHandler(void*) + 51
1  swift                    0x000000010f8088b6 SignalHandler(int) + 358
2  libsystem_platform.dylib 0x00007fff644d4b1d _sigtramp + 29
3  swift                    0x0000000110200000 (anonymous namespace)::DarwinX86AsmBackend::getCompactUnwindRegNum(unsigned int) const::CU32BitRegs + 117520
4  libsystem_c.dylib        0x00007fff643aaa5c abort + 120
5  swift                    0x000000010b459a00 std::__1::unique_ptr<swift::DiagnosticConsumer, std::__1::default_delete<swift::DiagnosticConsumer> > llvm::function_ref<std::__1::unique_ptr<swift::DiagnosticConsumer, std::__1::default_delete<swift::DiagnosticConsumer> > (swift::InputFile const&)>::callback_fn<createSerializedDiagnosticConsumerIfNeeded(swift::FrontendInputsAndOutputs const&)::$_15>(long, swift::InputFile const&) + 0
6  swift                    0x000000010f782306 llvm::report_fatal_error(llvm::Twine const&, bool) + 278
7  swift                    0x000000010f7821eb llvm::report_fatal_error(char const*, bool) + 43
8  swift                    0x000000010f742553 (anonymous namespace)::VerifierLegacyPass::runOnFunction(llvm::Function&) + 115
9  swift                    0x000000010f6e47c6 llvm::FPPassManager::runOnFunction(llvm::Function&) + 1590
10 swift                    0x000000010f6ef73e llvm::legacy::FunctionPassManager::run(llvm::Function&) + 446
11 swift                    0x000000010b6716b8 swift::performLLVM(swift::IRGenOptions&, swift::DiagnosticEngine*, llvm::sys::SmartMutex<false>*, llvm::GlobalVariable*, llvm::Module*, llvm::TargetMachine*, swift::version::Version const&, llvm::StringRef, swift::UnifiedStatsReporter*) + 4648
12 swift                    0x000000010b4634b3 performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) + 38307
13 swift                    0x000000010b456704 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 6820
14 swift                    0x000000010b3e3f93 main + 1219
15 libdyld.dylib            0x00007fff642d3c35 start + 1
error: Abort trap: 6 (in target 'MiniSwift' from project 'MiniSwift')

I will upload the crashing report if that helps to find out the issue:

mini-swift-1.zip

[belkadan]

@swift-ci create

[swift-ci]

Comment by Jorge Revuelta Herrero (JIRA)

Any idea of what is actually happening there?

[theblixguy]

It's crashing on this function in file Dispatch.swift in your project:

static Publisher<>.dispatch<A, B>(using:factory:taskMap:on:lifetime:)

Can you try to reduce the crash to a smaller example?

[swift-ci]

Comment by Jorge Revuelta Herrero (JIRA)

I'll try tomorrow to reduce exactly where the issue is produced and will upload it ASAP.

[swift-ci]

Comment by Jorge Revuelta Herrero (JIRA)

Here's a single file package which fails in the same way, AFAIK. Crashing.zip

[theblixguy]

   SIL verification failed: return value type does not match return type of function: functionResultType == instResultType
Verifying instruction:
     %17 = apply %16<Publishers.Create<Self.Output.State, Error>>(%6) : $@convention(method) <τ_0_0 where τ_0_0 : Publisher> (@in_guaranteed τ_0_0) -> @owned AnyPublisher<τ_0_0.Output, τ_0_0.Failure> // user: %20
->   return %17 : $AnyPublisher<Self.Output.State, Error> // id: %20
In function:
// static Publisher<>.dispatch<A>(taskMap:store:)

Will leave this to SIL experts. cc @eeckstein @gottesmm

[eeckstein]

cc @jckarter

[jckarter]

@theblixguy Was that during SILGen or after an optimization pass? What's the full backtrace?

[theblixguy]

Full trace:

SIL verification failed: return value type does not match return type of function: functionResultType == instResultType
Verifying instruction:
     %17 = apply %16<Publishers.Create<Self.Output.State, Error>>(%6) : $@convention(method) <τ_0_0 where τ_0_0 : Publisher> (@in_guaranteed τ_0_0) -> @owned AnyPublisher<τ_0_0.Output, τ_0_0.Failure> // user: %20
->   return %17 : $AnyPublisher<Self.Output.State, Error> // id: %20
In function:
// static Publisher<>.dispatch<A>(taskMap:store:)
sil [ossa] @$s7Combine9PublisherP10test_crashAA16ObservableObject6OutputRpzAD9StoreTypeAGRQAA19CurrentValueSubjectCyAF_5StateAdHPQZs5Error_pGAF_0f10WillChangeB0AaEPRCzrlE8dispatch7taskMap5storeAA03AnyB0VyAMs5NeverOGqd__SgAMc_AGtAD9TypedTaskCyypGRbd__lFZ : $@convention(method) <Self where Self : Publisher, Self.Output : ObservableObject, Self.Output : StoreType, Self.Output.ObjectWillChangePublisher : CurrentValueSubject<Self.Output.State, Error>><T where T : TypedTask<Any>> (@guaranteed @callee_guaranteed (@in_guaranteed Self.Output.State) -> @owned Optional<T>, @guaranteed Self.Output, @thick Self.Type) -> @owned AnyPublisher<Self.Output.State, Never> {
// %0                                             // users: %10, %3
// %1                                             // users: %9, %4
// %2                                             // user: %5
bb0(%0 : @guaranteed $@callee_guaranteed (@in_guaranteed Self.Output.State) -> @owned Optional<T>, %1 : @guaranteed $Self.Output, %2 : $@thick Self.Type):
  debug_value %0 : $@callee_guaranteed (@in_guaranteed Self.Output.State) -> @owned Optional<T>, let, name "taskMap", argno 1 // id: %3
  debug_value %1 : $Self.Output, let, name "store", argno 2 // id: %4
  debug_value %2 : $@thick Self.Type, let, name "self", argno 3 // id: %5
  %6 = alloc_stack $Publishers.Create<Self.Output.State, Error>, let, name "publisher" // users: %19, %18, %17, %15
  %7 = metatype $@thin Publishers.Create<Self.Output.State, Error>.Type // user: %15
  // function_ref closure #&#8203;1 in static Publisher<>.dispatch<A>(taskMap:store:)
  %8 = function_ref @$s7Combine9PublisherP10test_crashAA16ObservableObject6OutputRpzAD9StoreTypeAGRQAA19CurrentValueSubjectCyAF_5StateAdHPQZs5Error_pGAF_0f10WillChangeB0AaEPRCzrlE8dispatch7taskMap5storeAA03AnyB0VyAMs5NeverOGqd__SgAMc_AGtAD9TypedTaskCyypGRbd__lFZAA0U11CancellableCAA0U10SubscriberVyAMsAN_pGcfU_ : $@convention(thin) <τ_0_0 where τ_0_0 : Publisher, τ_0_0.Output : ObservableObject, τ_0_0.Output : StoreType, τ_0_0.Output.ObjectWillChangePublisher : CurrentValueSubject<τ_0_0.Output.State, Error>><τ_1_0 where τ_1_0 : TypedTask<Any>> (@in_guaranteed AnySubscriber<τ_0_0.Output.State, Error>, @guaranteed τ_0_0.Output, @guaranteed @callee_guaranteed (@in_guaranteed τ_0_0.Output.State) -> @owned Optional<τ_1_0>) -> @owned AnyCancellable // user: %11
  %9 = copy_value %1 : $Self.Output               // user: %11
  %10 = copy_value %0 : $@callee_guaranteed (@in_guaranteed Self.Output.State) -> @owned Optional<T> // user: %11
  %11 = partial_apply [callee_guaranteed] %8<Self, T>(%9, %10) : $@convention(thin) <τ_0_0 where τ_0_0 : Publisher, τ_0_0.Output : ObservableObject, τ_0_0.Output : StoreType, τ_0_0.Output.ObjectWillChangePublisher : CurrentValueSubject<τ_0_0.Output.State, Error>><τ_1_0 where τ_1_0 : TypedTask<Any>> (@in_guaranteed AnySubscriber<τ_0_0.Output.State, Error>, @guaranteed τ_0_0.Output, @guaranteed @callee_guaranteed (@in_guaranteed τ_0_0.Output.State) -> @owned Optional<τ_1_0>) -> @owned AnyCancellable // user: %13
  // function_ref thunk for @escaping @callee_guaranteed (@in_guaranteed AnySubscriber<A.Output.State, Error>) -> (@owned AnyCancellable)
  %12 = function_ref @$s7Combine13AnySubscriberVy6Output_5State10test_crash9StoreTypePQZs5Error_pGAA0B11CancellableCIegno_AkMIegnr_AA9PublisherRzAF9TypedTaskCyypGRbd__AA16ObservableObjectADRpzAfgSRQAA19CurrentValueSubjectCyAIsAJ_pGAD_0p10WillChangeL0AaRPRCzr__lTR : $@convention(thin) <τ_0_0 where τ_0_0 : Publisher, τ_0_0.Output : ObservableObject, τ_0_0.Output : StoreType, τ_0_0.Output.ObjectWillChangePublisher : CurrentValueSubject<τ_0_0.Output.State, Error>><τ_1_0 where τ_1_0 : TypedTask<Any>> (@in_guaranteed AnySubscriber<τ_0_0.Output.State, Error>, @guaranteed @callee_guaranteed (@in_guaranteed AnySubscriber<τ_0_0.Output.State, Error>) -> @owned AnyCancellable) -> @out AnyCancellable // user: %13
  %13 = partial_apply [callee_guaranteed] %12<Self, T>(%11) : $@convention(thin) <τ_0_0 where τ_0_0 : Publisher, τ_0_0.Output : ObservableObject, τ_0_0.Output : StoreType, τ_0_0.Output.ObjectWillChangePublisher : CurrentValueSubject<τ_0_0.Output.State, Error>><τ_1_0 where τ_1_0 : TypedTask<Any>> (@in_guaranteed AnySubscriber<τ_0_0.Output.State, Error>, @guaranteed @callee_guaranteed (@in_guaranteed AnySubscriber<τ_0_0.Output.State, Error>) -> @owned AnyCancellable) -> @out AnyCancellable // user: %15
  // function_ref Publishers.Create.init<A>(create:)
  %14 = function_ref @$s7Combine10PublishersO10test_crashE6CreateV6createAFy_xq_Gqd__AA13AnySubscriberVyxq_Gc_tcAA12SubscriptionRd__lufC : $@convention(method) <τ_0_0, τ_0_1 where τ_0_1 : Error><τ_1_0 where τ_1_0 : Subscription> (@owned @callee_guaranteed (@in_guaranteed AnySubscriber<τ_0_0, τ_0_1>) -> @out τ_1_0, @thin Publishers.Create<τ_0_0, τ_0_1>.Type) -> @out Publishers.Create<τ_0_0, τ_0_1> // user: %15
  %15 = apply %14<Self.Output.State, Error, AnyCancellable>(%6, %13, %7) : $@convention(method) <τ_0_0, τ_0_1 where τ_0_1 : Error><τ_1_0 where τ_1_0 : Subscription> (@owned @callee_guaranteed (@in_guaranteed AnySubscriber<τ_0_0, τ_0_1>) -> @out τ_1_0, @thin Publishers.Create<τ_0_0, τ_0_1>.Type) -> @out Publishers.Create<τ_0_0, τ_0_1>
  // function_ref Publisher.eraseToAnyPublisher()
  %16 = function_ref @$s7Combine9PublisherPAAE010eraseToAnyB0AA0eB0Vy6OutputQz7FailureQzGyF : $@convention(method) <τ_0_0 where τ_0_0 : Publisher> (@in_guaranteed τ_0_0) -> @owned AnyPublisher<τ_0_0.Output, τ_0_0.Failure> // user: %17
  %17 = apply %16<Publishers.Create<Self.Output.State, Error>>(%6) : $@convention(method) <τ_0_0 where τ_0_0 : Publisher> (@in_guaranteed τ_0_0) -> @owned AnyPublisher<τ_0_0.Output, τ_0_0.Failure> // user: %20
  destroy_addr %6 : $*Publishers.Create<Self.Output.State, Error> // id: %18
  dealloc_stack %6 : $*Publishers.Create<Self.Output.State, Error> // id: %19
  return %17 : $AnyPublisher<Self.Output.State, Error> // id: %20
} // end sil function '$s7Combine9PublisherP10test_crashAA16ObservableObject6OutputRpzAD9StoreTypeAGRQAA19CurrentValueSubjectCyAF_5StateAdHPQZs5Error_pGAF_0f10WillChangeB0AaEPRCzrlE8dispatch7taskMap5storeAA03AnyB0VyAMs5NeverOGqd__SgAMc_AGtAD9TypedTaskCyypGRbd__lFZ'

Stack dump:
0.  Program arguments: ./swiftc -frontend -typecheck -emit-ir /Users/suyashsrijan/Desktop/test_crash.swift -sdk /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk
1.  Swift version 5.1-dev (LLVM 200186e28b, Swift 2339b5f9bd)
2.  While emitting SIL for 'dispatch(taskMap:store:)' (at /Users/suyashsrijan/Desktop/test_crash.swift:97:12)
3.  While silgen emitFunction SIL function "@$s7Combine9PublisherP10test_crashAA16ObservableObject6OutputRpzAD9StoreTypeAGRQAA19CurrentValueSubjectCyAF_5StateAdHPQZs5Error_pGAF_0f10WillChangeB0AaEPRCzrlE8dispatch7taskMap5storeAA03AnyB0VyAMs5NeverOGqd__SgAMc_AGtAD9TypedTaskCyypGRbd__lFZ".
 for 'dispatch(taskMap:store:)' (at /Users/suyashsrijan/Desktop/test_crash.swift:97:12)
4.  While verifying SIL function "@$s7Combine9PublisherP10test_crashAA16ObservableObject6OutputRpzAD9StoreTypeAGRQAA19CurrentValueSubjectCyAF_5StateAdHPQZs5Error_pGAF_0f10WillChangeB0AaEPRCzrlE8dispatch7taskMap5storeAA03AnyB0VyAMs5NeverOGqd__SgAMc_AGtAD9TypedTaskCyypGRbd__lFZ".
 for 'dispatch(taskMap:store:)' (at /Users/suyashsrijan/Desktop/test_crash.swift:97:12)
0  swiftc                   0x000000010698f065 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 37
1  swiftc                   0x000000010698e355 llvm::sys::RunSignalHandlers() + 85
2  swiftc                   0x000000010698f648 SignalHandler(int) + 264
3  libsystem_platform.dylib 0x00007fff68354b1d _sigtramp + 29
4  swiftc                   0x0000000108cdb380 llvm::dbgs()::thestrm + 0
5  libsystem_c.dylib        0x00007fff6822aa5c abort + 120
6  swiftc                   0x000000010398f838 (anonymous namespace)::SILVerifier::_require(bool, llvm::Twine const&, std::__1::function<void ()> const&) + 616
7  swiftc                   0x00000001039a2b1f swift::SILInstructionVisitor<(anonymous namespace)::SILVerifier, void>::visit(swift::SILInstruction*) + 66879
8  swiftc                   0x000000010399136c (anonymous namespace)::SILVerifier::visitSILBasicBlock(swift::SILBasicBlock*) + 1484
9  swiftc                   0x000000010398c007 swift::SILFunction::verify(bool) const + 7303
10 swiftc                   0x00000001034307b5 swift::Lowering::SILGenModule::postEmitFunction(swift::SILDeclRef, swift::SILFunction*) + 213
11 swiftc                   0x0000000103436fa0 swift::Lowering::SILGenModule::emitFunction(swift::FuncDecl*)::$_0::operator()(swift::SILFunction*) const + 256
12 swiftc                   0x000000010342f613 swift::Lowering::SILGenModule::emitFunction(swift::FuncDecl*) + 611
13 swiftc                   0x00000001035088e9 SILGenExtension::visitFuncDecl(swift::FuncDecl*) + 313
14 swiftc                   0x0000000103505e2b SILGenExtension::emitExtension(swift::ExtensionDecl*) + 59
15 swiftc                   0x0000000103505de5 swift::Lowering::SILGenModule::visitExtensionDecl(swift::ExtensionDecl*) + 21
16 swiftc                   0x0000000103434636 swift::Lowering::SILGenModule::emitSourceFile(swift::SourceFile*) + 822
17 swiftc                   0x00000001034355f9 swift::SILModule::constructSIL(swift::ModuleDecl*, swift::SILOptions&, swift::FileUnit*) + 361
18 swiftc                   0x00000001034359b0 swift::performSILGeneration(swift::ModuleDecl*, swift::SILOptions&) + 16
19 swiftc                   0x000000010315674a performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) + 9450
20 swiftc                   0x0000000103153330 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 3024
21 swiftc                   0x00000001030fed79 main + 729
22 libdyld.dylib            0x00007fff68153c35 start + 1
zsh: abort      ./swiftc -frontend -typecheck -emit-ir ~/Desktop/test_crash.swift -sdk

[gregomni]

Possible solution: #26736

[slavapestov]

#31835