Compiler crash in SwiftDeclConverter::VisitObjCPropertyDecl (Segmentation Fault 11)

1oo7 · 2020-10-21T04:02:53.820Z

Running into the following crash in the Swift 5.3 compiler (Xcode 12.0):

1.	Apple Swift version 5.3 (swiftlang-1200.0.29.2 clang-1200.0.30.1)
2.	While looking for 'myNavigationController'3.	While ...in 'REDACTED' (in module 'REDACTED')
4.	/Users/REDACTED/Build/Products/Testing-iphonesimulator/REDACTED.framework/Headers/REDACTED-Swift.h:1375:76: importing 'MyProtocol::myNavigationController'
0  swift                    0x000000010e300865 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 37
1  swift                    0x000000010e2ff865 llvm::sys::RunSignalHandlers() + 85
2  swift                    0x000000010e300e1f SignalHandler(int) + 111
3  libsystem_platform.dylib 0x00007fff704165fd _sigtramp + 29
4  libsystem_platform.dylib 000000000000000000 _sigtramp + 18446603338632829472
5  swift                    0x000000010ae70003 (anonymous namespace)::SwiftDeclConverter::VisitObjCPropertyDecl(clang::ObjCPropertyDecl const*) + 259
6  swift                    0x000000010ae588db swift::ClangImporter::Implementation::importDeclAndCacheImpl(clang::NamedDecl const*, swift::importer::ImportNameVersion, bool, bool) + 1483
7  swift                    0x000000010ae42972 swift::ClangImporter::loadObjCMethods(swift::ClassDecl*, swift::ObjCSelector, bool, unsigned int, llvm::TinyPtrVector<swift::AbstractFunctionDecl*>&) + 258
8  swift                    0x000000010afad19d swift::ASTContext::loadObjCMethods(swift::ClassDecl*, swift::ObjCSelector, bool, unsigned int, llvm::TinyPtrVector<swift::AbstractFunctionDecl*>&) + 301
9  swift                    0x000000010b17f8e4 swift::ClassDecl::lookupDirect(swift::ObjCSelector, bool) + 180
10 swift                    0x000000010ad47a36 lookupObjCMethodInClass(swift::ClassDecl*, swift::ObjCSelector, bool, bool, swift::SourceManager&, bool) + 54
11 swift                    0x000000010ad47440 swift::diagnoseUnintendedObjCMethodOverrides(swift::SourceFile&) + 944
12 swift                    0x000000010ae290da swift::performWholeModuleTypeChecking(swift::SourceFile&) + 250
13 swift                    0x0000000109fa3abd swift::CompilerInstance::performSemaUpTo(swift::SourceFile::ASTStage_t) + 8237
14 swift                    0x0000000109e642fd swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 6845
15 swift                    0x0000000109de8c07 main + 1255
16 libdyld.dylib            0x00007fff7021dcc9 start + 1
17 libdyld.dylib            0x0000000000000099 start + 18446603338634896337
error: Segmentation fault: 11 (in target 'REDACTEDTests' from project 'REDACTED')

... Please advise. Thanks.

1oo7 · 2020-10-21T04:47:10.860Z

Seems similar, but not identical, to [SR-3853] Compiler segfault when compiling tests and using a class from another framework and extending a superclass of that class with a convenience init in another file · Issue #46438 · apple/swift · GitHub

1oo7 · 2020-10-24T04:15:12.507Z

Filed bug report:

github.com/apple/swift

[SR-13772] Segfault on compiling test using an @objc protocol with name distinct from the Objective-C generated name

opened 05:14AM - 24 Oct 20 UTC

swift-ci

bug Compiler

| | | |------------------|-----------------|… |Previous ID | SR-13772 | |Radar | rdar://problem/70687408 | |Original Reporter | xy (JIRA User) | |Type | Bug | <details> <summary>Additional Detail from JIRA</summary> | | | |------------------|-----------------| |Votes | 0 | |Component/s | Compiler | |Labels | Bug | |Assignee | None | |Priority | Medium | md5: 5c50f1e1acbee2bf3029406aaf11ec8a </details> **Issue Description:** Given an Objective C method like: - (NSData \*)transactionForTransactionData(\_ data: NSData) ... the Swift Compiler would normally generate a Swift function like: func transaction(for transactionData: Data) -\> Data But, if this Objective C method was auto-created by the Objective C compiler due to an Objective C class Bar's header declaring an implementing an @objc Swift protocol Fooy in another module Foo with a function name like: @objc func transactionForTransactionData(\_ data: NSData) -\> NSData ... without actually listing the implementation for it ... ... and if that Bar also inherits from FBSnapshotTestCase ... ... and if there is yet another module Qux in which another class Qux inherits from that Bar, and then if MocQux inherits from Qux, and declares its own local implementations of the Foo protocol methods... then we get Segmentation Fault 11. See sample project and README for instructions: <https://github.com/1oo7/segfault11.git> Stacktrace: 1\. Apple Swift version 5.3 (swiftlang-1200.0.29.2 clang-1200.0.30.1) 2. While looking for 'myNavigationController'3. While ...in 'REDACTED' (in module 'REDACTED') 4. /Users/REDACTED/Build/Products/Testing-iphonesimulator/REDACTED.framework/Headers/REDACTED-Swift.h:1375:76: importing 'MyProtocol::myNavigationController' 0 swift 0x000000010e300865 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 37 1 swift 0x000000010e2ff865 llvm::sys::RunSignalHandlers() + 85 2 swift 0x000000010e300e1f SignalHandler(int) + 111 3 libsystem_platform.dylib 0x00007fff704165fd \_sigtramp + 29 4 libsystem_platform.dylib 000000000000000000 \_sigtramp + 18446603338632829472 5 swift 0x000000010ae70003 (anonymous namespace)::SwiftDeclConverter::VisitObjCPropertyDecl(clang::ObjCPropertyDecl const\*) + 259 6 swift 0x000000010ae588db swift::ClangImporter::Implementation::importDeclAndCacheImpl(clang::NamedDecl const\*, swift::importer::ImportNameVersion, bool, bool) + 1483 7 swift 0x000000010ae42972 swift::ClangImporter::loadObjCMethods(swift::ClassDecl\*, swift::ObjCSelector, bool, unsigned int, llvm::TinyPtrVector\<swift::AbstractFunctionDecl\*\>&) + 258 8 swift 0x000000010afad19d swift::ASTContext::loadObjCMethods(swift::ClassDecl\*, swift::ObjCSelector, bool, unsigned int, llvm::TinyPtrVector\<swift::AbstractFunctionDecl\*\>&) + 301 9 swift 0x000000010b17f8e4 swift::ClassDecl::lookupDirect(swift::ObjCSelector, bool) + 180 10 swift 0x000000010ad47a36 lookupObjCMethodInClass(swift::ClassDecl\*, swift::ObjCSelector, bool, bool, swift::SourceManager&, bool) + 54 11 swift 0x000000010ad47440 swift::diagnoseUnintendedObjCMethodOverrides(swift::SourceFile&) + 944 12 swift 0x000000010ae290da swift::performWholeModuleTypeChecking(swift::SourceFile&) + 250 13 swift 0x0000000109fa3abd swift::CompilerInstance::performSemaUpTo(swift::SourceFile::ASTStage_t) + 8237 14 swift 0x0000000109e642fd swift::performFrontend(llvm::ArrayRef\<char const\*\>, char const\*, void\*, swift::FrontendObserver\*) + 6845 15 swift 0x0000000109de8c07 main + 1255 16 libdyld.dylib 0x00007fff7021dcc9 start + 1 17 libdyld.dylib 0x0000000000000099 start + 18446603338634896337 error: Segmentation fault: 11 (in target 'REDACTEDTests' from project 'REDACTED')

Sample code to reproduce the crash:

GitHub

GitHub - 1oo7/segfault11: swift 5.3 compiler bug

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