[SR-12192] Compiler crash in SILGen in Xcode 11.4 beta 1 #54617

BasThomas · 2020-02-12T12:29:11Z


Previous ID	SR-12192
Radar	rdar://problem/59496033
Original Reporter	@BasThomas
Type	Bug

Additional Detail from JIRA


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

md5: 95ad63d11ff49c45c24b991bf48447d5

Issue Description:

The following code fixes a compiler crash in Xcode 11.4 beta 1, as seen in this project/pull request.

Code before, crashing

private func load(fromPath path: String) -> Loaded? {
    let url = CFURLCreateWithFileSystemPath(
        kCFAllocatorDefault,
        path as CFString,
        .cfurlposixPathStyle,
        false
    )

    guard let font = url.flatMap(CGDataProvider.init).flatMap(CGFont.init) else {
        return nil
    }

    return CTFontCreateWithGraphicsFont(font, CGFloat(size), nil, nil)
}

Code after, not crashing

private func load(fromPath path: String) -> Loaded? {
    guard
        let url = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, path as CFString, .cfurlposixPathStyle, false),
        let provider = CGDataProvider(url: url),
        let font = CGFont(provider)
    else {
        return nil
    }

    return CTFontCreateWithGraphicsFont(font, CGFloat(size), nil, nil)
}

Moving away from mapping from URL to provider to font, opting to use guard let constructs for each resolves the crash.

This is the segmentation fault:

1.  Apple Swift version 5.2 (swiftlang-1103.0.22 clang-1103.0.22)
2.  While emitting IR SIL function "@$sSo17CGDataProviderRefa3urlABSgSo8CFURLRefa_tcfcTO".
 for 'init(url:)' (in module 'CoreGraphics')
0  swift                    0x00000001073079b3 PrintStackTraceSignalHandler(void*) + 51
1  swift                    0x0000000107307170 SignalHandler(int) + 352
2  libsystem_platform.dylib 0x00007fff6b02c42d _sigtramp + 29
3  libsystem_malloc.dylib   0x00007fff6afeb656 tiny_malloc_should_clear + 272
4  swift                    0x0000000102c735fe swift::irgen::NativeConventionSchema::mapIntoNative(swift::irgen::IRGenModule&, swift::irgen::IRGenFunction&, swift::irgen::Explosion&, swift::SILType, bool) const + 3758
5  swift                    0x0000000102c72417 swift::irgen::addNativeArgument(swift::irgen::IRGenFunction&, swift::irgen::Explosion&, swift::CanTypeWrapper<swift::SILFunctionType>, swift::SILParameterInfo, swift::irgen::Explosion&, bool) + 935
6  swift                    0x0000000102c760c1 swift::irgen::CallEmission::setArgs(swift::irgen::Explosion&, bool, swift::irgen::WitnessMetadata*) + 801
7  swift                    0x0000000102e3cd16 (anonymous namespace)::IRGenSILFunction::visitFullApplySite(swift::FullApplySite) + 2294
8  swift                    0x0000000102e1bb83 swift::irgen::IRGenModule::emitSILFunction(swift::SILFunction*) + 9027
9  swift                    0x0000000102ccbde6 swift::irgen::IRGenerator::emitLazyDefinitions() + 8822
10 swift                    0x0000000102df8604 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**) + 1284
11 swift                    0x0000000102be2b5c performCompileStepsPostSILGen(swift::CompilerInstance&, swift::CompilerInvocation&, std::__1::unique_ptr<swift::SILModule, std::__1::default_delete<swift::SILModule> >, bool, llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>, swift::PrimarySpecificPaths const&, bool, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) + 4252
12 swift                    0x0000000102bd920e swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 61406
13 swift                    0x0000000102b4a283 main + 1299
14 libdyld.dylib            0x00007fff6ae337fd start + 1
15 libdyld.dylib            0x000000000000005c start + 2501691488
error: Segmentation fault: 11 (in target 'Splash' from project 'Splash')

The text was updated successfully, but these errors were encountered:

theblixguy · 2020-02-12T17:59:55Z

On master:

Assertion failed: (fn->getLoweredFunctionType() == constantType), function getOrCreateFunction, file /Users/suyashsrijan/Documents/swift-src/swift/lib/SIL/SILFunctionBuilder.cpp, line 115.
Stack dump:
0.  Program arguments: /Users/suyashsrijan/Documents/swift-src/build/Xcode-RelWithDebInfoAssert/swift-macosx-x86_64/Debug/bin/swift -frontend -interpret /Users/suyashsrijan/Desktop/test.swift -enable-objc-interop -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -color-diagnostics -module-name test -- -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk
1.  Swift version 5.2-dev (LLVM 88d1013b2e, Swift 8e8d195752)
2.  While evaluating request SILGenWholeModuleRequest(SIL Generation for module test)
3.  While emitting SIL for 'load(fromPath:)' (at /Users/suyashsrijan/Desktop/test.swift:5:9)
4.  While silgen emitFunction SIL function "@$s4test4load33_83378C430F65473055F1BD53F3ADCDB7LL8fromPathypSgSS_tF".
 for 'load(fromPath:)' (at /Users/suyashsrijan/Desktop/test.swift:5:9)
5.  While silgen emitCurryThunk SIL function "@$sSo17CGDataProviderRefa3urlABSgSo8CFURLRefa_tcfCTc".
 for 'init(url:)' (in module 'CoreGraphics')
6.  While silgen emitConstructor SIL function "@CGDataProviderCreateWithURL".
 for 'init(url:)' (in module 'CoreGraphics')
7.  While silgen emitForeignToNativeThunk SIL function "@$sSo17CGDataProviderRefa3urlABSgSo8CFURLRefa_tcfcTO".
 for 'init(url:)' (in module 'CoreGraphics')
0  swift                    0x0000000104581075 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 37
1  swift                    0x0000000104580285 llvm::sys::RunSignalHandlers() + 85
2  swift                    0x0000000104581666 SignalHandler(int) + 278
3  libsystem_platform.dylib 0x00007fff70da242d _sigtramp + 29
4  libsystem_platform.dylib 0x0000000000004c80 _sigtramp + 2401642608
5  libsystem_c.dylib        0x00007fff70c77a1c abort + 120
6  libsystem_c.dylib        0x00007fff70c76cd6 err + 0
7  swift                    0x0000000104899531 swift::SILFunctionBuilder::getOrCreateFunction(swift::SILLocation, swift::SILDeclRef, swift::ForDefinition_t, swift::ProfileCounter) (.cold.3) + 33
8  swift                    0x000000010118d749 swift::SILFunctionBuilder::getOrCreateFunction(swift::SILLocation, swift::SILDeclRef, swift::ForDefinition_t, swift::ProfileCounter) + 1481
9  swift                    0x0000000100c1823d swift::Lowering::SILGenModule::getFunction(swift::SILDeclRef, swift::ForDefinition_t) + 381
10 swift                    0x0000000100cf3d04 swift::Lowering::SILGenFunction::emitGlobalFunctionRef(swift::SILLocation, swift::SILDeclRef, swift::Lowering::SILConstantInfo, bool) + 532
11 swift                    0x0000000100c4f632 swift::Lowering::SILGenFunction::emitForeignToNativeThunk(swift::SILDeclRef) + 4242
12 swift                    0x0000000100cf2754 swift::Lowering::SILGenModule::emitForeignToNativeThunk(swift::SILDeclRef) + 324
13 swift                    0x0000000100cf3ce2 swift::Lowering::SILGenFunction::emitGlobalFunctionRef(swift::SILLocation, swift::SILDeclRef, swift::Lowering::SILConstantInfo, bool) + 498
14 swift                    0x0000000100c9f103 swift::Lowering::SILGenFunction::emitSiblingMethodRef(swift::SILLocation, swift::SILValue, swift::SILDeclRef, swift::SubstitutionMap) + 435
15 swift                    0x0000000100c608af swift::Lowering::SILGenFunction::emitClassConstructorAllocator(swift::ConstructorDecl*) + 1519
16 swift                    0x0000000100c209ad swift::Lowering::SILGenModule::emitConstructor(swift::ConstructorDecl*)::$_1::operator()(swift::SILFunction*) const + 237
17 swift                    0x0000000100c19051 swift::Lowering::SILGenModule::emitConstructor(swift::ConstructorDecl*) + 1249
18 swift                    0x0000000100c18628 swift::Lowering::SILGenModule::getFunction(swift::SILDeclRef, swift::ForDefinition_t) + 1384
19 swift                    0x0000000100cf3d04 swift::Lowering::SILGenFunction::emitGlobalFunctionRef(swift::SILLocation, swift::SILDeclRef, swift::Lowering::SILConstantInfo, bool) + 532
20 swift                    0x0000000100cf2fdf swift::Lowering::SILGenFunction::emitCurryThunk(swift::SILDeclRef) + 2111
21 swift                    0x0000000100cf391e swift::Lowering::SILGenModule::emitCurryThunk(swift::SILDeclRef) + 254
22 swift                    0x0000000100cf3cf2 swift::Lowering::SILGenFunction::emitGlobalFunctionRef(swift::SILLocation, swift::SILDeclRef, swift::Lowering::SILConstantInfo, bool) + 514
23 swift                    0x0000000100c2da6b (anonymous namespace)::Callee::getFnValue(swift::Lowering::SILGenFunction&, bool, llvm::Optional<swift::Lowering::ManagedValue>) const & + 955
24 swift                    0x0000000100c2a430 (anonymous namespace)::CallEmission::apply(swift::Lowering::SGFContext) + 3408
25 swift                    0x0000000100c29648 swift::Lowering::SILGenFunction::emitApplyExpr(swift::ApplyExpr*, swift::Lowering::SGFContext) + 2408
26 swift                    0x0000000100c8814c swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) + 92
27 swift                    0x0000000100c7db96 swift::Lowering::SILGenFunction::emitRValueAsSingleValue(swift::Expr*, swift::Lowering::SGFContext) + 54
28 swift                    0x0000000100c8eff0 swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) + 28416
29 swift                    0x0000000100c7db96 swift::Lowering::SILGenFunction::emitRValueAsSingleValue(swift::Expr*, swift::Lowering::SGFContext) + 54
30 swift                    0x0000000100c072c4 swift::Lowering::ArgumentSource::getAsSingleValue(swift::Lowering::SILGenFunction&, swift::Lowering::SGFContext) && + 436
31 swift                    0x0000000100c68077 swift::Lowering::SILGenFunction::emitConvertedRValue(swift::SILLocation, swift::Lowering::Conversion const&, swift::Lowering::SGFContext, llvm::function_ref<swift::Lowering::ManagedValue (swift::Lowering::SILGenFunction&, swift::SILLocation, swift::Lowering::SGFContext)>) + 343
32 swift                    0x0000000100c0745f swift::Lowering::ArgumentSource::getConverted(swift::Lowering::SILGenFunction&, swift::Lowering::Conversion const&, swift::Lowering::SGFContext) && + 159
33 swift                    0x0000000100c3a67b (anonymous namespace)::ArgEmitter::emit(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern) + 3627
34 swift                    0x0000000100c2715d (anonymous namespace)::ArgEmitter::emitSingleArg(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern) + 461
35 swift                    0x0000000100c394a3 (anonymous namespace)::ArgEmitter::emitPreparedArgs(swift::Lowering::PreparedArguments&&, swift::Lowering::AbstractionPattern) + 147
36 swift                    0x0000000100c443b9 (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) && + 713
37 swift                    0x0000000100c43d1b (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>&) + 1787
38 swift                    0x0000000100c2a352 (anonymous namespace)::CallEmission::apply(swift::Lowering::SGFContext) + 3186
39 swift                    0x0000000100c29648 swift::Lowering::SILGenFunction::emitApplyExpr(swift::ApplyExpr*, swift::Lowering::SGFContext) + 2408
40 swift                    0x0000000100c8814c swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) + 92
41 swift                    0x0000000100c7db96 swift::Lowering::SILGenFunction::emitRValueAsSingleValue(swift::Expr*, swift::Lowering::SGFContext) + 54
42 swift                    0x0000000100c3a4e6 (anonymous namespace)::ArgEmitter::emit(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern) + 3222
43 swift                    0x0000000100c2715d (anonymous namespace)::ArgEmitter::emitSingleArg(swift::Lowering::ArgumentSource&&, swift::Lowering::AbstractionPattern) + 461
44 swift                    0x0000000100c394a3 (anonymous namespace)::ArgEmitter::emitPreparedArgs(swift::Lowering::PreparedArguments&&, swift::Lowering::AbstractionPattern) + 147
45 swift                    0x0000000100c443b9 (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) && + 713
46 swift                    0x0000000100c43d1b (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>&) + 1787
47 swift                    0x0000000100c2a352 (anonymous namespace)::CallEmission::apply(swift::Lowering::SGFContext) + 3186
48 swift                    0x0000000100c29648 swift::Lowering::SILGenFunction::emitApplyExpr(swift::ApplyExpr*, swift::Lowering::SGFContext) + 2408
49 swift                    0x0000000100c8814c swift::ASTVisitor<(anonymous namespace)::RValueEmitter, swift::Lowering::RValue, void, void, void, void, void, swift::Lowering::SGFContext>::visit(swift::Expr*, swift::Lowering::SGFContext) + 92
50 swift                    0x0000000100c7ae6f swift::Lowering::SILGenFunction::emitExprInto(swift::Expr*, swift::Lowering::Initialization*, llvm::Optional<swift::SILLocation>) + 303
51 swift                    0x0000000100c6d24b swift::Lowering::SILGenFunction::emitStmtCondition(llvm::MutableArrayRef<swift::StmtConditionElement>, swift::Lowering::JumpDest, swift::SILLocation, swift::ProfileCounter, swift::ProfileCounter) + 459
52 swift                    0x0000000100ced3ba swift::ASTVisitor<(anonymous namespace)::StmtEmitter, void, void, void, void, void, void>::visit(swift::Stmt*) + 11162
53 swift                    0x0000000100cf02e8 (anonymous namespace)::StmtEmitter::visitBraceStmt(swift::BraceStmt*) + 232
54 swift                    0x0000000100cea815 swift::Lowering::SILGenFunction::emitStmt(swift::Stmt*) + 21
55 swift                    0x0000000100ca10d4 swift::Lowering::SILGenFunction::emitFunction(swift::FuncDecl*) + 372
56 swift                    0x0000000100c2048d swift::Lowering::SILGenModule::emitFunction(swift::FuncDecl*)::$_0::operator()(swift::SILFunction*) const + 237
57 swift                    0x0000000100c189d1 swift::Lowering::SILGenModule::emitFunction(swift::FuncDecl*) + 609
58 swift                    0x0000000100c1db63 (anonymous namespace)::SILGenModuleRAII::emitSourceFile(swift::SourceFile*) + 883
59 swift                    0x0000000100c1eb14 swift::SILGenWholeModuleRequest::evaluate(swift::Evaluator&, swift::SILGenDescriptor) const + 180
60 swift                    0x0000000100cea3d1 swift::SimpleRequest<swift::SILGenWholeModuleRequest, std::__1::unique_ptr<swift::SILModule, std::__1::default_delete<swift::SILModule> > (swift::SILGenDescriptor), (swift::CacheKind)0>::evaluateRequest(swift::SILGenWholeModuleRequest const&, swift::Evaluator&) + 33
61 swift                    0x0000000100c21d57 llvm::Expected<swift::SILGenWholeModuleRequest::OutputType> swift::Evaluator::getResultUncached<swift::SILGenWholeModuleRequest>(swift::SILGenWholeModuleRequest const&) + 343
62 swift                    0x0000000100c1ec8d swift::performSILGeneration(swift::ModuleDecl*, swift::Lowering::TypeConverter&, swift::SILOptions const&) + 109
63 swift                    0x0000000100938889 performCompile(swift::CompilerInstance&, swift::CompilerInvocation const&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) + 8681
64 swift                    0x0000000100935718 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 4120
65 swift                    0x00000001008ceade main + 734
66 libdyld.dylib            0x00007fff70ba97fd start + 1
zsh: abort      ./swift ~/Desktop/test.swift -sdk $(xcrun --show-sdk-path)

beccadax · 2020-02-16T21:01:48Z

@swift-ci create

swift-ci transferred this issue from apple/swift-issues Apr 25, 2022

AnthonyLatsis added the crash Bug: A crash, i.e., an abnormal termination of software label Dec 12, 2022

AnthonyLatsis removed the compiler crash label Apr 17, 2023

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[SR-12192] Compiler crash in SILGen in Xcode 11.4 beta 1 #54617

[SR-12192] Compiler crash in SILGen in Xcode 11.4 beta 1 #54617

BasThomas commented Feb 12, 2020

theblixguy commented Feb 12, 2020

beccadax commented Feb 16, 2020

[SR-12192] Compiler crash in SILGen in Xcode 11.4 beta 1 #54617

[SR-12192] Compiler crash in SILGen in Xcode 11.4 beta 1 #54617

Comments

BasThomas commented Feb 12, 2020

theblixguy commented Feb 12, 2020

beccadax commented Feb 16, 2020