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[SR-11869] Generic class with generic initializer and @Published property crashes the compiler #54283

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sindresorhus opened this issue Nov 28, 2019 · 2 comments
Closed

[SR-11869] Generic class with generic initializer and @Published property crashes the compiler #54283

sindresorhus opened this issue Nov 28, 2019 · 2 comments
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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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@sindresorhus
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Previous ID SR-11869
Radar rdar://problem/57549598
Original Reporter @sindresorhus
Type Bug
Status Resolved
Resolution Done
Environment

Swift 5.1

Xcode 11.2.1

macOS 10.15.1

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

md5: 497ef8466808c62eb8d5e73eba22f375

Issue Description:

The following crashes the Swift compiler:

@available(macOS 10.15, *)
final class Foo<A> {
    @Published var a: A

    init<B>(a: A, b: B) {
        self.a = a
    }
}
Stack dump:
0.  Program arguments: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift -frontend -c /Users/sindresorhus/dev/private/SSKit/SSKit/util.swift -primary-file /Users/sindresorhus/dev/private/SSKit/SSKit/ViewController.swift /Users/sindresorhus/dev/private/SSKit/SSKit/extra.swift /Users/sindresorhus/dev/private/SSKit/SSKit/AppDelegate.swift -emit-module-path /Users/sindresorhus/Library/Developer/Xcode/DerivedData/SSKit-fuqcwavkiryflibkisabfpeaxzwe/Build/Intermediates.noindex/SSKit.build/Debug/SSKit.build/Objects-normal/x86_64/ViewController~partial.swiftmodule -emit-module-doc-path /Users/sindresorhus/Library/Developer/Xcode/DerivedData/SSKit-fuqcwavkiryflibkisabfpeaxzwe/Build/Intermediates.noindex/SSKit.build/Debug/SSKit.build/Objects-normal/x86_64/ViewController~partial.swiftdoc -serialize-diagnostics-path /Users/sindresorhus/Library/Developer/Xcode/DerivedData/SSKit-fuqcwavkiryflibkisabfpeaxzwe/Build/Intermediates.noindex/SSKit.build/Debug/SSKit.build/Objects-normal/x86_64/ViewController.dia -emit-dependencies-path /Users/sindresorhus/Library/Developer/Xcode/DerivedData/SSKit-fuqcwavkiryflibkisabfpeaxzwe/Build/Intermediates.noindex/SSKit.build/Debug/SSKit.build/Objects-normal/x86_64/ViewController.d -emit-reference-dependencies-path /Users/sindresorhus/Library/Developer/Xcode/DerivedData/SSKit-fuqcwavkiryflibkisabfpeaxzwe/Build/Intermediates.noindex/SSKit.build/Debug/SSKit.build/Objects-normal/x86_64/ViewController.swiftdeps -target x86_64-apple-macos10.14.4 -enable-objc-interop -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -I /Users/sindresorhus/Library/Developer/Xcode/DerivedData/SSKit-fuqcwavkiryflibkisabfpeaxzwe/Build/Products/Debug -F /Users/sindresorhus/Library/Developer/Xcode/DerivedData/SSKit-fuqcwavkiryflibkisabfpeaxzwe/Build/Products/Debug -enable-testing -g -module-cache-path /Users/sindresorhus/Library/Developer/Xcode/DerivedData/ModuleCache.noindex -swift-version 5 -enforce-exclusivity=checked -Onone -D DEBUG -serialize-debugging-options -Xcc -working-directory -Xcc /Users/sindresorhus/dev/private/SSKit -enable-anonymous-context-mangled-names -Xcc -I/Users/sindresorhus/Library/Developer/Xcode/DerivedData/SSKit-fuqcwavkiryflibkisabfpeaxzwe/Build/Intermediates.noindex/SSKit.build/Debug/SSKit.build/swift-overrides.hmap -Xcc -iquote -Xcc /Users/sindresorhus/Library/Developer/Xcode/DerivedData/SSKit-fuqcwavkiryflibkisabfpeaxzwe/Build/Intermediates.noindex/SSKit.build/Debug/SSKit.build/SSKit-generated-files.hmap -Xcc -I/Users/sindresorhus/Library/Developer/Xcode/DerivedData/SSKit-fuqcwavkiryflibkisabfpeaxzwe/Build/Intermediates.noindex/SSKit.build/Debug/SSKit.build/SSKit-own-target-headers.hmap -Xcc -I/Users/sindresorhus/Library/Developer/Xcode/DerivedData/SSKit-fuqcwavkiryflibkisabfpeaxzwe/Build/Intermediates.noindex/SSKit.build/Debug/SSKit.build/SSKit-all-target-headers.hmap -Xcc -iquote -Xcc /Users/sindresorhus/Library/Developer/Xcode/DerivedData/SSKit-fuqcwavkiryflibkisabfpeaxzwe/Build/Intermediates.noindex/SSKit.build/Debug/SSKit.build/SSKit-project-headers.hmap -Xcc -I/Users/sindresorhus/Library/Developer/Xcode/DerivedData/SSKit-fuqcwavkiryflibkisabfpeaxzwe/Build/Products/Debug/include -Xcc -I/Users/sindresorhus/Library/Developer/Xcode/DerivedData/SSKit-fuqcwavkiryflibkisabfpeaxzwe/Build/Intermediates.noindex/SSKit.build/Debug/SSKit.build/DerivedSources-normal/x86_64 -Xcc -I/Users/sindresorhus/Library/Developer/Xcode/DerivedData/SSKit-fuqcwavkiryflibkisabfpeaxzwe/Build/Intermediates.noindex/SSKit.build/Debug/SSKit.build/DerivedSources/x86_64 -Xcc -I/Users/sindresorhus/Library/Developer/Xcode/DerivedData/SSKit-fuqcwavkiryflibkisabfpeaxzwe/Build/Intermediates.noindex/SSKit.build/Debug/SSKit.build/DerivedSources -Xcc -DDEBUG=1 -module-name SSKit -o /Users/sindresorhus/Library/Developer/Xcode/DerivedData/SSKit-fuqcwavkiryflibkisabfpeaxzwe/Build/Intermediates.noindex/SSKit.build/Debug/SSKit.build/Objects-normal/x86_64/ViewController.o -index-store-path /Users/sindresorhus/Library/Developer/Xcode/DerivedData/SSKit-fuqcwavkiryflibkisabfpeaxzwe/Index/DataStore -index-system-modules 
1.  While emitting IR SIL function "@$s5SSKit3FooC1a1bACyxGx_qd__tclufc".
 for 'init(a:b:)' (at /Users/sindresorhus/dev/private/SSKit/SSKit/ViewController.swift:7:2)
0  swift                    0x000000010a5bba13 PrintStackTraceSignalHandler(void*) + 51
1  swift                    0x000000010a5bb1e6 SignalHandler(int) + 358
2  libsystem_platform.dylib 0x00007fff6ea5ab1d _sigtramp + 29
3  libsystem_platform.dylib 0x00007f9f0e58b560 _sigtramp + 2679310944
4  swift                    0x000000010648f615 emitDirectTypeMetadataRef(swift::irgen::IRGenFunction&, swift::CanType, swift::irgen::DynamicMetadataRequest) + 197
5  swift                    0x0000000106493f05 swift::irgen::IRGenFunction::emitTypeMetadataRef(swift::CanType, swift::irgen::DynamicMetadataRequest) + 149
6  swift                    0x00000001063d56b6 swift::irgen::emitGenericRequirementFromSubstitutions(swift::irgen::IRGenFunction&, swift::CanGenericSignature, swift::ModuleDecl&, swift::irgen::GenericRequirement, swift::SubstitutionMap) + 310
7  swift                    0x00000001063d54e4 void llvm::function_ref<void (swift::irgen::GenericRequirement)>::callback_fn<(anonymous namespace)::EmitPolymorphicArguments::emit(swift::SubstitutionMap, swift::irgen::WitnessMetadata*, swift::irgen::Explosion&)::$_21>(long, swift::irgen::GenericRequirement) + 36
8  swift                    0x00000001063d333d void llvm::function_ref<void (swift::irgen::GenericRequirement)>::callback_fn<(anonymous namespace)::PolymorphicConvention::enumerateUnfulfilledRequirements(llvm::function_ref<void (swift::irgen::GenericRequirement)> const&)::$_11>(long, swift::irgen::GenericRequirement) + 205
9  swift                    0x000000010713ac72 swift::GenericSignature::forEachParam(llvm::function_ref<void (swift::GenericTypeParamType*, bool)>) const + 690
10 swift                    0x00000001063d3162 (anonymous namespace)::PolymorphicConvention::enumerateUnfulfilledRequirements(llvm::function_ref<void (swift::irgen::GenericRequirement)> const&) + 82
11 swift                    0x00000001063d5265 swift::irgen::emitPolymorphicArguments(swift::irgen::IRGenFunction&, swift::CanTypeWrapper<swift::SILFunctionType>, swift::SubstitutionMap, swift::irgen::WitnessMetadata*, swift::irgen::Explosion&) + 485
12 swift                    0x000000010645e223 (anonymous namespace)::IRGenSILFunction::visitFullApplySite(swift::FullApplySite) + 2019
13 swift                    0x000000010643e8fa swift::irgen::IRGenModule::emitSILFunction(swift::SILFunction*) + 9834
14 swift                    0x00000001062eb080 swift::irgen::IRGenerator::emitGlobalTopLevel() + 1712
15 swift                    0x000000010641b675 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**) + 1189
16 swift                    0x0000000106207e31 performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) + 36673
17 swift                    0x00000001061fb6e4 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 6820
18 swift                    0x0000000106188be3 main + 1219
19 libdyld.dylib            0x00007fff6e8592e5 start + 1
20 libdyld.dylib            0x000000000000004a start + 2440719718
error: Segmentation fault: 11 (in target 'SSKit' from project 'SSKit')
@beccadax
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beccadax commented Dec 2, 2019

@swift-ci create

@aschwaighofer
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This is fixed with a recent swift.org toolchain.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
This issue was closed.
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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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@sindresorhus @beccadax @aschwaighofer