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[SR-11858] Self initializer used in extension of itself crashes the compiler #54267

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sindresorhus opened this issue Nov 26, 2019 · 2 comments
Closed

[SR-11858] Self initializer used in extension of itself crashes the compiler #54267

sindresorhus opened this issue Nov 26, 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-11858
Radar rdar://problem/57494717
Original Reporter @sindresorhus
Type Bug
Status Resolved
Resolution Done
Environment

Swift 5.1
Xcode 11.2.1

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

md5: ed99908fd1190e41578a2c312462429c

Issue Description:

This compiles fine:

import Cocoa

extension CAMediaTimingFunction {
    static let linear = CAMediaTimingFunction(name: .linear)
}

This crashes Swift:

import Cocoa

extension CAMediaTimingFunction {
    static let linear = Self(name: .linear)
}
Segmentation fault: 11

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 
0  swift                    0x000000010dfa1a13 PrintStackTraceSignalHandler(void*) + 51
1  swift                    0x000000010dfa11e6 SignalHandler(int) + 358
2  libsystem_platform.dylib 0x00007fff6ea5ab1d _sigtramp + 29
3  libsystem_platform.dylib 0x0000000000000400 _sigtramp + 2438617344
4  swift                    0x000000010a4fbd18 swift::MetatypeInst::create(swift::SILDebugLocation, swift::SILType, swift::SILFunction*, swift::SILOpenedArchetypesState&) + 72
5  swift                    0x0000000109fad604 swift::SILBuilder::createMetatype(swift::SILLocation, swift::SILType) + 148
6  swift                    0x000000010a01cdcb swift::Lowering::SILGenBuilder::createMetatype(swift::SILLocation, swift::SILType) + 187
7  swift                    0x000000010a04f978 swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) + 18552
8  swift                    0x000000010a04b6bc swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) + 1468
9  swift                    0x0000000109fed17b (anonymous namespace)::ArgEmitter::emit(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern) + 4475
10 swift                    0x0000000109ffe127 (anonymous namespace)::ArgEmitter::emitTopLevel(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern) + 935
11 swift                    0x0000000109ffdb2d (anonymous namespace)::CallSite::emit(swift::Lowering::SILGenFunction&, swift::Lowering::AbstractionPattern, swift::CanTypeWrapper<swift::SILFunctionType>, (anonymous namespace)::ParamLowering&, llvm::SmallVectorImpl<swift::Lowering::ManagedValue>&, llvm::SmallVectorImpl<(anonymous namespace)::DelayedArgument>&, llvm::Optional<swift::ForeignErrorConvention> const&, swift::ImportAsMemberStatus) && + 701
12 swift                    0x0000000109ffacab (anonymous namespace)::CallEmission::emitArgumentsForNormalApply(swift::CanTypeWrapper<swift::FunctionType>&, swift::Lowering::AbstractionPattern&, swift::CanTypeWrapper<swift::SILFunctionType>, llvm::Optional<swift::ForeignErrorConvention> const&, swift::ImportAsMemberStatus, llvm::SmallVectorImpl<swift::Lowering::ManagedValue>&, llvm::Optional<swift::SILLocation>&, swift::CanTypeWrapper<swift::FunctionType>&) + 1451
13 swift                    0x0000000109ff8763 (anonymous namespace)::CallEmission::apply(swift::Lowering::SGFContext) + 3059
14 swift                    0x0000000109ff4a1b swift::Lowering::SILGenFunction::emitApplyExpr(swift::Expr*, swift::Lowering::SGFContext) + 2331
15 swift                    0x000000010a04bbec swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) + 2796
16 swift                    0x000000010a04af23 swift::Lowering::SILGenFunction::emitExprInto(swift::Expr*, swift::Lowering::Initialization*, llvm::Optional<swift::SILLocation>) + 131
17 swift                    0x000000010a03e31c swift::Lowering::SILGenFunction::emitPatternBinding(swift::PatternBindingDecl*, unsigned int) + 268
18 swift                    0x000000010a07b321 swift::Lowering::SILGenModule::emitGlobalInitialization(swift::PatternBindingDecl*, unsigned int) + 2417
19 swift                    0x000000010a0d2332 swift::Lowering::SILGenModule::visitExtensionDecl(swift::ExtensionDecl*) + 370
20 swift                    0x0000000109fe6806 swift::Lowering::SILGenModule::emitSourceFile(swift::SourceFile*) + 1238
21 swift                    0x0000000109fe8266 swift::SILModule::constructSIL(swift::ModuleDecl*, swift::SILOptions&, swift::FileUnit*) + 1238
22 swift                    0x0000000109bebda4 performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) + 28340
23 swift                    0x0000000109be16e4 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 6820
24 swift                    0x0000000109b6ebe3 main + 1219
25 libdyld.dylib            0x00007fff6e8592e5 start + 1
26 libdyld.dylib            0x000000000000004a start + 2440719718
error: Segmentation fault: 11 (in target 'SSKit' from project 'SSKit')
@typesanitizer
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@swift-ci create

@theblixguy
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Doesn't crash on master:

/Users/suyashsrijan/Desktop/test.swift:4:13: error: stored property cannot have covariant 'Self' type
        static let linear = Self(name: .linear)
                   ^
/Users/suyashsrijan/Desktop/test.swift:4:22: error: covariant 'Self' type cannot be referenced from a stored property initializer
        static let linear = Self(name: .linear)
                            ^

@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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@sindresorhus @theblixguy @typesanitizer