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[SR-9159] case let as when switching a function causes segfault #51654

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swift-ci opened this issue Nov 2, 2018 · 4 comments
Closed

[SR-9159] case let as when switching a function causes segfault #51654

swift-ci opened this issue Nov 2, 2018 · 4 comments
Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself crash Bug: A crash, i.e., an abnormal termination of software SILGen Area → compiler: The SIL generation stage

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@swift-ci
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swift-ci commented Nov 2, 2018

Previous ID SR-9159
Radar rdar://problem/45962466
Original Reporter voxar (JIRA User)
Type Bug
Status Closed
Resolution Done
Environment

Standard App Store Xcode 10.1 installation on OS X 10.14 (18A391)

$swiftc --version
{{ Apple Swift version 4.2.1 (swiftlang-1000.11.42 clang-1000.11.45.1)Target: x86_64-apple-darwin18.0.0}}

Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug, CompilerCrash, SILGen
Assignee None
Priority Medium

md5: ac2b5234363d3d1679981ffae99457b1

Issue Description:

The following code causes a segmentation fault

func hello() {}
switch hello { 
  case let a as Any: print(a)
}
0 swift 0x0000000107cd659a PrintStackTraceSignalHandler(void*) + 42
1 swift 0x0000000107cd5d4e SignalHandler(int) + 302
2 libsystem_platform.dylib 0x00007fff5855bb3d _sigtramp + 29
3 libsystem_platform.dylib 0x00007feeb1e40238 _sigtramp + 1502496536
4 swift 0x00000001054d1769 llvm::Optional<swift::Type> llvm::function_ref<llvm::Optional<swift::Type> (swift::TypeBase*)>::callback_fn<swift::Type::transform(llvm::function_ref<swift::Type (swift::Type)>) const::$_15>(long, swift::TypeBase*) + 25
5 swift 0x00000001054d17d8 swift::Type::transformRec(llvm::function_ref<llvm::Optional<swift::Type> (swift::TypeBase*)>) const + 56
6 swift 0x000000010419a83c swift::irgen::IRGenFunction::emitTypeMetadataRef(swift::CanType, swift::irgen::DynamicMetadataRequest) + 76
7 swift 0x000000010419a5d2 (anonymous namespace)::EmitTypeMetadataRef::visitAnyMetatypeType(swift::CanTypeWrapper<swift::AnyMetatypeType>, swift::irgen::DynamicMetadataRequest) + 130
8 swift 0x0000000104196fb3 emitDirectTypeMetadataRef(swift::irgen::IRGenFunction&, swift::CanType, swift::irgen::DynamicMetadataRequest) + 339
9 swift 0x0000000104196e44 swift::irgen::MetadataResponse llvm::function_ref<swift::irgen::MetadataResponse (swift::irgen::IRGenFunction&, swift::irgen::DynamicMetadataRequest, llvm::Constant*)>::callback_fn<swift::irgen::getTypeMetadataAccessFunction(swift::irgen::IRGenModule&, swift::CanType, swift::ForDefinition_t)::$_2>(long, swift::irgen::IRGenFunction&, swift::irgen::DynamicMetadataRequest, llvm::Constant*) + 500
10 swift 0x0000000104196c39 swift::irgen::MetadataResponse llvm::function_ref<swift::irgen::MetadataResponse (swift::irgen::IRGenFunction&, swift::irgen::Explosion&)>::callback_fn<swift::irgen::getTypeMetadataAccessFunction(swift::irgen::IRGenModule&, swift::CanType, swift::ForDefinition_t, llvm::function_ref<swift::irgen::MetadataResponse (swift::irgen::IRGenFunction&, swift::irgen::DynamicMetadataRequest, llvm::Constant*)>)::$_1>(long, swift::irgen::IRGenFunction&, swift::irgen::Explosion&) + 89
11 swift 0x0000000104195210 swift::irgen::emitLazyCacheAccessFunction(swift::irgen::IRGenModule&, llvm::Function*, llvm::GlobalVariable*, llvm::function_ref<swift::irgen::MetadataResponse (swift::irgen::IRGenFunction&, swift::irgen::Explosion&)>, bool) + 1504
12 swift 0x0000000104196bca swift::irgen::getTypeMetadataAccessFunction(swift::irgen::IRGenModule&, swift::CanType, swift::ForDefinition_t, llvm::function_ref<swift::irgen::MetadataResponse (swift::irgen::IRGenFunction&, swift::irgen::DynamicMetadataRequest, llvm::Constant*)>) + 506
13 swift 0x000000010419aa32 emitCallToTypeMetadataAccessFunction(swift::irgen::IRGenFunction&, swift::CanType, swift::irgen::DynamicMetadataRequest, swift::ForDefinition_t) + 114
14 swift 0x000000010419a8c3 swift::irgen::IRGenFunction::emitTypeMetadataRef(swift::CanType, swift::irgen::DynamicMetadataRequest) + 211
15 swift 0x000000010419d956 swift::irgen::emitMetatypeRef(swift::irgen::IRGenFunction&, swift::CanTypeWrapper<swift::MetatypeType>, swift::irgen::Explosion&) + 102
16 swift 0x00000001041530de swift::SILInstructionVisitor<(anonymous namespace)::IRGenSILFunction, void>::visit(swift::SILInstruction*) + 38958
17 swift 0x0000000104146d41 swift::irgen::IRGenModule::emitSILFunction(swift::SILFunction*) + 9825
18 swift 0x0000000104028910 swift::irgen::IRGenerator::emitGlobalTopLevel(bool) + 1184
19 swift 0x0000000104127386 performIRGeneration(swift::IRGenOptions&, swift::ModuleDecl*, std::__1::unique_ptr<swift::SILModule, std::__1::default_delete<swift::SILModule> >, llvm::StringRef, swift::PrimarySpecificPaths const&, llvm::LLVMContext&, swift::SourceFile*, llvm::GlobalVariable**, unsigned int) + 1382
20 swift 0x00000001041241b7 swift::performIRGeneration(swift::IRGenOptions&, swift::ModuleDecl*, std::__1::unique_ptr<swift::SILModule, std::__1::default_delete<swift::SILModule> >, llvm::StringRef, swift::PrimarySpecificPaths const&, llvm::LLVMContext&, llvm::ArrayRef<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > >, llvm::GlobalVariable**) + 727
21 swift 0x0000000103f67d80 performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) + 47952
22 swift 0x0000000103f58d35 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 7717
23 swift 0x0000000103efe965 main + 1349
24 libdyld.dylib 0x00007fff58372085 start + 1
25 libdyld.dylib 0x0000000000000009 start + 2814959493
Stack dump:
0. Program arguments: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift -frontend -interpret untitled 2 -enable-objc-interop -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk -module-name untitled_7j 
1. While emitting IR SIL function "@main".
@belkadan
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belkadan commented Nov 2, 2018

On master:

Assertion failed: (operand.getType().isAddress()), function emitConditional, file /Volumes/Data/swift-public/swift/lib/SILGen/SILGenDynamicCast.cpp, line 391.

7  swift                    0x000000010e829b52 swift::Lowering::SILGenFunction::emitCheckedCastBranchOld(swift::SILLocation, swift::Lowering::ConsumableManagedValue, swift::Type, swift::CanType, swift::Lowering::SGFContext, llvm::function_ref<void (swift::Lowering::ManagedValue)>, llvm::function_ref<void ()>, swift::ProfileCounter, swift::ProfileCounter) + 2802
8  swift                    0x000000010e87dee9 (anonymous namespace)::PatternMatchEmission::emitSpecializedDispatch((anonymous namespace)::ClauseMatrix&, llvm::ArrayRef<swift::Lowering::ConsumableManagedValue>, unsigned int&, unsigned int, std::__1::function<void (swift::SILLocation)> const&) + 7193
9  swift                    0x000000010e878b6d (anonymous namespace)::PatternMatchEmission::emitDispatch((anonymous namespace)::ClauseMatrix&, llvm::ArrayRef<swift::Lowering::ConsumableManagedValue>, std::__1::function<void (swift::SILLocation)> const&) + 1997
10 swift                    0x000000010e877cef swift::Lowering::SILGenFunction::emitSwitchStmt(swift::SwitchStmt*) + 2735

@swift-ci create

@slavapestov
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#20626

@AnnaZaks
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AnnaZaks mannequin commented Jul 23, 2019

voxar (JIRA User), Could you verify if the problem is fixed and if so move the JIRA to "Closed"?

Thanks!
Anna

@swift-ci
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Comment by Patrik Sjöberg (JIRA)

Hi, sorry I've been on vacation 🙂

Confirm, looks good in xcode 10.2.1

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@AnthonyLatsis AnthonyLatsis added the crash Bug: A crash, i.e., an abnormal termination of software label Dec 12, 2022
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself crash Bug: A crash, i.e., an abnormal termination of software SILGen Area → compiler: The SIL generation stage
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