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[SR-6711] Segfault when declaring extension of protocol in certain separate file under spooky conditions #49260

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swift-ci opened this issue Jan 6, 2018 · 1 comment
Open

[SR-6711] Segfault when declaring extension of protocol in certain separate file under spooky conditions #49260

swift-ci opened this issue Jan 6, 2018 · 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 crash Bug: A crash, i.e., an abnormal termination of software

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@swift-ci
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swift-ci commented Jan 6, 2018

Previous ID SR-6711
Radar None
Original Reporter neightchan (JIRA User)
Type Bug
Additional Detail from JIRA
Votes 0
Component/s Source Tooling
Labels Bug, CompilerCrash
Assignee None
Priority Medium

md5: 173a93aef886bad0d32b3569060b789e

Issue Description:

Not sure how to shrink this one yet. This segfault us occurring when declaring an extension on a type Foo in the same framework but in a different file B from the file A where Foo was declared. But in yet another file C there is an extension on Foo--and that extension's presence causes no problems. Also of potential note, there is an extension in A on Foo as well. To be clear, when this line of code occurs in B,

extension Foo {}

the segfault occurs.

0  swift                    0x000000010ad5636a PrintStackTraceSignalHandler(void*) + 42
1  swift                    0x000000010ad557a6 SignalHandler(int) + 662
2  libsystem_platform.dylib 0x00007fffd5abeb3a _sigtramp + 26
3  libsystem_malloc.dylib   0x00007fffd5a3291f tiny_malloc_from_free_list + 431
4  swift                    0x0000000108868380 swift::Mangle::ASTMangler::appendAssocType(swift::DependentMemberType*, bool&) + 320
5  swift                    0x0000000108864629 swift::Mangle::ASTMangler::appendType(swift::Type) + 4025
6  swift                    0x0000000108863df5 swift::Mangle::ASTMangler::appendType(swift::Type) + 1925
7  swift                    0x0000000108867532 swift::Mangle::ASTMangler::appendFunctionType(swift::AnyFunctionType*, bool) + 82
8  swift                    0x000000010886a02f swift::Mangle::ASTMangler::appendDeclType(swift::ValueDecl const*, bool) + 2271
9  swift                    0x00000001088696b1 swift::Mangle::ASTMangler::appendEntity(swift::ValueDecl const*, llvm::StringRef, bool) + 257
10 swift                    0x000000010886bc5b swift::Mangle::ASTMangler::mangleDeclAsUSR(swift::ValueDecl const*, llvm::StringRef) + 811
11 swift                    0x00000001089466c5 swift::ide::printDeclUSR(swift::ValueDecl const*, llvm::raw_ostream&) + 2293
12 swift                    0x000000010839a5c9 (anonymous namespace)::IndexSwiftASTWalker::getNameAndUSR(swift::ValueDecl*, swift::ExtensionDecl*, llvm::StringRef&, llvm::StringRef&) + 489
13 swift                    0x0000000108398a7f (anonymous namespace)::IndexSwiftASTWalker::initIndexSymbol(swift::ValueDecl*, swift::SourceLoc, bool, swift::index::IndexSymbol&) + 175
14 swift                    0x0000000108396dd4 (anonymous namespace)::IndexSwiftASTWalker::walkToDeclPre(swift::Decl*, swift::CharSourceRange) + 2580
15 swift                    0x000000010892cd2e (anonymous namespace)::SemaAnnotator::walkToDeclPre(swift::Decl*) + 1022
16 swift                    0x0000000108893218 (anonymous namespace)::Traversal::doIt(swift::Decl*) + 280
17 swift                    0x000000010889399f (anonymous namespace)::Traversal::visitParameterList(swift::ParameterList*) + 95
18 swift                    0x000000010889588b (anonymous namespace)::Traversal::visitAbstractFunctionDecl(swift::AbstractFunctionDecl*) + 267
19 swift                    0x000000010889328b (anonymous namespace)::Traversal::doIt(swift::Decl*) + 395
20 swift                    0x000000010889574b (anonymous namespace)::Traversal::visitNominalTypeDecl(swift::NominalTypeDecl*) + 475
21 swift                    0x000000010889327e (anonymous namespace)::Traversal::doIt(swift::Decl*) + 382
22 swift                    0x000000010892bc5f swift::SourceEntityWalker::walk(swift::SourceFile&) + 223
23 swift                    0x000000010839b71e (anonymous namespace)::IndexSwiftASTWalker::visitModule(swift::ModuleDecl&, llvm::StringRef) + 510
24 swift                    0x000000010839b4f9 swift::index::indexSourceFile(swift::SourceFile*, llvm::StringRef, swift::index::IndexDataConsumer&) + 457
25 swift                    0x000000010839f59e recordSourceFileUnit(swift::SourceFile*, llvm::StringRef, llvm::StringRef, bool, bool, llvm::StringRef, llvm::ArrayRef<clang::FileEntry const*>, clang::CompilerInstance const&, swift::DiagnosticEngine&) + 2142
26 swift                    0x00000001076b6d5f emitIndexData(swift::SourceFile*, swift::CompilerInvocation const&, swift::CompilerInstance&) + 1119
27 swift                    0x00000001076b3ce8 performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*, swift::UnifiedStatsReporter*) + 17032
28 swift                    0x00000001076ae1f4 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 7716
29 swift                    0x0000000107662e78 main + 12248
30 libdyld.dylib            0x00007fffd58af235 start + 1
31 libdyld.dylib            0x0000000000000064 start + 712314416
@belkadan
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belkadan commented Jan 8, 2018

Any chance you can share the entire project, then? If not publicly, at least with Apple at https://bugreport.apple.com ?

@nkcsgexi, @nathawes, sound familiar?

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@AnthonyLatsis AnthonyLatsis added crash Bug: A crash, i.e., an abnormal termination of software compiler The Swift compiler in itself labels 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
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@belkadan @swift-ci @AnthonyLatsis