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[SR-14822] Crash while compiling an unwrapping code #57170

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swift-ci opened this issue Jun 24, 2021 · 1 comment
Closed

[SR-14822] Crash while compiling an unwrapping code #57170

swift-ci opened this issue Jun 24, 2021 · 1 comment
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself

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@swift-ci
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Previous ID SR-14822
Radar None
Original Reporter moshegottlieb (JIRA User)
Type Bug
Status Resolved
Resolution Done

Attachment: Download

Environment

Reproducible on multiple environments (iOS, macOS).

Attaching a project file with a demo.

Tested on a Mac mini M1

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

md5: f3b3cfcc2bd6c7573fe0909c689aedb2

Issue Description:

The following minimal example makes the swift compiler bundled with Xcode 12.5.1 crash.

I've only encountered it while unwrapping an optional result value, but I guess there could be other cases.

 
import Foundation
 
extension String : Error {}
 
class Obj {
}
 
func crash(value:Obj?,completion:@escaping (Result<Obj?,Error>)->()){
    completion(Result {
        guard let value = value else
{             *throw* "Error"         }
 
         return value
 
     })
 
 }
 
  
 
 crash(value: nil) { result in
 
     do {
 
         let value = try result.get()
 
         guard let value = value else {             *throw* "Error"         }
    } catch
{         print("Error: \(error)")     }
}

Compiler crash log:

/Users/xxxx/Downloads/crash/crash/main.swift:27:19: warning: value 'value' was defined but never used; consider replacing with boolean test
        guard let value = value else {
              ~~~~^~~~~~~~
                                != nil
Stored value type does not match pointer operand type!
  store %T5crash3ObjC* %55, i64* %11, align 8, !dbg !215
 i64in function $s5crashys6ResultOyAA3ObjCSgs5Error_pGcfU_
<unknown>:0: error: fatal error encountered during compilation; please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project
<unknown>:0: note: Broken function found, compilation aborted!
Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project and the crash backtrace.
Stack dump:
0. Program arguments: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -c -primary-file /Users/xxxx/Downloads/crash/crash/main.swift -emit-module-path /Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Build/Intermediates.noindex/crash.build/Debug/crash.build/Objects-normal/arm64/main~partial.swiftmodule -emit-module-doc-path /Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Build/Intermediates.noindex/crash.build/Debug/crash.build/Objects-normal/arm64/main~partial.swiftdoc -emit-module-source-info-path /Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Build/Intermediates.noindex/crash.build/Debug/crash.build/Objects-normal/arm64/main~partial.swiftsourceinfo -serialize-diagnostics-path /Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Build/Intermediates.noindex/crash.build/Debug/crash.build/Objects-normal/arm64/main.dia -emit-dependencies-path /Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Build/Intermediates.noindex/crash.build/Debug/crash.build/Objects-normal/arm64/main.d -emit-reference-dependencies-path /Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Build/Intermediates.noindex/crash.build/Debug/crash.build/Objects-normal/arm64/main.swiftdeps -target arm64-apple-macos11.3 -Xllvm -aarch64-use-tbi -enable-objc-interop -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.3.sdk -I /Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Build/Products/Debug -F /Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Build/Products/Debug -enable-testing -g -module-cache-path /Users/xxxx/Library/Developer/Xcode/DerivedData/ModuleCache.noindex -swift-version 5 -enforce-exclusivity=checked -Onone -D DEBUG -serialize-debugging-options -Xcc -working-directory -Xcc /Users/xxxx/Downloads/crash -enable-anonymous-context-mangled-names -Xcc -I/Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Build/Intermediates.noindex/crash.build/Debug/crash.build/swift-overrides.hmap -Xcc -iquote -Xcc /Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Build/Intermediates.noindex/crash.build/Debug/crash.build/crash-generated-files.hmap -Xcc -I/Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Build/Intermediates.noindex/crash.build/Debug/crash.build/crash-own-target-headers.hmap -Xcc -I/Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Build/Intermediates.noindex/crash.build/Debug/crash.build/crash-all-target-headers.hmap -Xcc -iquote -Xcc /Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Build/Intermediates.noindex/crash.build/Debug/crash.build/crash-project-headers.hmap -Xcc -I/Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Build/Products/Debug/include -Xcc -I/Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Build/Intermediates.noindex/crash.build/Debug/crash.build/DerivedSources-normal/arm64 -Xcc -I/Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Build/Intermediates.noindex/crash.build/Debug/crash.build/DerivedSources/arm64 -Xcc -I/Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Build/Intermediates.noindex/crash.build/Debug/crash.build/DerivedSources -Xcc -DDEBUG=1 -target-sdk-version 11.3 -module-name crash -o /Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Build/Intermediates.noindex/crash.build/Debug/crash.build/Objects-normal/arm64/main.o -index-store-path /Users/xxxx/Library/Developer/Xcode/DerivedData/crash-anqzepowswdhlfgorswkbmcmbale/Index/DataStore -index-system-modules 
1. Apple Swift version 5.4.2 (swiftlang-1205.0.28.2 clang-1205.0.19.57)
2. Running pass 'Module Verifier' on function '@"$s5crashys6ResultOyAA3ObjCSgs5Error_pGcfU_"'
0  swift-frontend           0x00000001063986e0 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 52
1  swift-frontend           0x0000000106397858 llvm::sys::RunSignalHandlers() + 128
2  swift-frontend           0x0000000106398cb0 SignalHandler(int) + 292
3  libsystem_platform.dylib 0x000000019860ec44 _sigtramp + 56
4  libsystem_pthread.dylib  0x00000001985c343c pthread_kill + 292
5  libsystem_c.dylib        0x000000019850b460 abort + 104
6  swift-frontend           0x00000001022d9d28 std::__1::__throw_length_error(char const*) + 0
7  swift-frontend           0x00000001063058c8 llvm::report_fatal_error(llvm::Twine const&, bool) + 252
8  swift-frontend           0x00000001063057cc llvm::report_fatal_error(llvm::Twine const&, bool) + 0
9  swift-frontend           0x00000001062afef0 void llvm::VerifierSupport::CheckFailed<llvm::Instruction*, llvm::MDNode const*>(llvm::Twine const&, llvm::Instruction* const&, llvm::MDNode const* const&) + 0
10 swift-frontend           0x00000001062548c8 llvm::FPPassManager::runOnFunction(llvm::Function&) + 1136
11 swift-frontend           0x0000000106253e80 llvm::legacy::FunctionPassManagerImpl::run(llvm::Function&) + 96
12 swift-frontend           0x000000010625a4f8 llvm::legacy::FunctionPassManager::run(llvm::Function&) + 336
13 swift-frontend           0x00000001025ee30c swift::performLLVMOptimizations(swift::IRGenOptions const&, llvm::Module*, llvm::TargetMachine*) + 1484
14 swift-frontend           0x00000001025ef228 swift::performLLVM(swift::IRGenOptions const&, swift::DiagnosticEngine&, llvm::sys::SmartMutex<false>*, llvm::GlobalVariable*, llvm::Module*, llvm::TargetMachine*, llvm::StringRef, swift::UnifiedStatsReporter*) + 2464
15 swift-frontend           0x00000001022e554c performCompileStepsPostSILGen(swift::CompilerInstance&, std::__1::unique_ptr<swift::SILModule, std::__1::default_delete<swift::SILModule> >, llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>, swift::PrimarySpecificPaths const&, int&, swift::FrontendObserver*) + 3084
16 swift-frontend           0x00000001022d758c swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 5556
17 swift-frontend           0x000000010226c460 main + 1136
18 libdyld.dylib            0x00000001985e1450 start + 4
error: Abort trap: 6 (in target 'crash' from project 'crash')
@typesanitizer
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I see the crash for Xcode 12.5 but it seems to be fixed on main and Xcode 13 beta. Please verify with a development toolchain snapshot from swift.org or the latest Xcode 13 beta release.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself
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