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[SR-11086] Crash in REPL when redeclaring class with variable #4336
Comments
@swift-ci create |
Comment by Andrew Litteken (JIRA) I was thinking of trying to take a run at this bug as a first try at working with the compiler, would this be an ok starting bug? |
I don't think we really know what the problem is yet. You'd be better picking one with a "StarterBug" label. |
Comment by Andrew Litteken (JIRA) Ok, I'l take a look, FWIW I did get a different error message when running from the lldb repository: Assertion failed: (isa<X>(Val) && "cast<Ty>() argument of incompatible type!"), function cast, file /Users/andrewlitteken/Documents/side-interests/swift-source/llvm/include/llvm/Support/Casting.h, line 255.
0 lldb 0x0000000104c452c5 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 37
1 lldb 0x0000000104c44567 llvm::sys::RunSignalHandlers() + 39
2 lldb 0x0000000104c45928 SignalHandler(int) + 264
3 libsystem_platform.dylib 0x00007fff7bcebb5d _sigtramp + 29
4 libsystem_platform.dylib 0x0000700004d24468 _sigtramp + 2298710312
5 libsystem_c.dylib 0x00007fff7bba56a6 abort + 127
6 libsystem_c.dylib 0x00007fff7bb6e20d basename_r + 0
7 LLDB 0x00000001111e7b83 resolveIdentTypeComponent(swift::TypeResolution, llvm::ArrayRef<swift::ComponentIdentTypeRepr*>, swift::TypeResolutionOptions) (.cold.5) + 35
8 LLDB 0x000000010dbd4679 resolveIdentTypeComponent(swift::TypeResolution, llvm::ArrayRef<swift::ComponentIdentTypeRepr*>, swift::TypeResolutionOptions) + 3321
9 LLDB 0x000000010dbd3674 swift::TypeChecker::resolveIdentifierType(swift::TypeResolution, swift::IdentTypeRepr*, swift::TypeResolutionOptions) + 164
10 LLDB 0x000000010dbd4ab7 (anonymous namespace)::TypeResolver::resolveType(swift::TypeRepr*, swift::TypeResolutionOptions) + 295
11 LLDB 0x000000010dbd2d77 swift::TypeResolution::resolveType(swift::TypeRepr*, swift::TypeResolutionOptions) + 247
12 LLDB 0x000000010dbd47ed swift::TypeChecker::validateType(swift::TypeLoc&, swift::TypeResolution, swift::TypeResolutionOptions) + 109
13 LLDB 0x000000010db7d11b validateTypedPattern(swift::TypeChecker&, swift::TypeResolution, swift::TypedPattern*, swift::TypeResolutionOptions) + 219
14 LLDB 0x000000010db7cc54 swift::TypeChecker::typeCheckPattern(swift::Pattern*, swift::DeclContext*, swift::TypeResolutionOptions) + 388
15 LLDB 0x000000010db46656 validatePatternBindingEntries(swift::TypeChecker&, swift::PatternBindingDecl*) + 598
16 LLDB 0x000000010db3f744 (anonymous namespace)::DeclChecker::visit(swift::Decl*) + 1796
17 LLDB 0x000000010db3f036 swift::TypeChecker::typeCheckDecl(swift::Decl*) + 38
18 LLDB 0x000000010dbbf65a swift::ASTVisitor<(anonymous namespace)::StmtChecker, void, swift::Stmt*, void, void, void, void>::visit(swift::Stmt*) + 458
19 LLDB 0x000000010dbbe818 bool (anonymous namespace)::StmtChecker::typeCheckStmt<swift::BraceStmt>(swift::BraceStmt*&) + 136
20 LLDB 0x000000010dbbe90e swift::TypeChecker::typeCheckTopLevelCodeDecl(swift::TopLevelCodeDecl*) + 174
21 LLDB 0x000000010dbdf0e2 swift::performTypeChecking(swift::SourceFile&, swift::TopLevelContext&, swift::OptionSet<swift::TypeCheckingFlags, unsigned int>, unsigned int, unsigned int, unsigned int, unsigned int, unsigned int) + 914
22 LLDB 0x000000010c4d0399 lldb_private::SwiftExpressionParser::Parse(lldb_private::DiagnosticManager&, unsigned int, unsigned int) + 937
23 LLDB 0x000000010c516b4d lldb_private::SwiftUserExpression::Parse(lldb_private::DiagnosticManager&, lldb_private::ExecutionContext&, lldb_private::ExecutionPolicy, bool, bool) + 2141
24 LLDB 0x000000010bb7b261 lldb_private::UserExpression::Evaluate(lldb_private::ExecutionContext&, lldb_private::EvaluateExpressionOptions const&, llvm::StringRef, llvm::StringRef, lldb_private::SharingPtr<lldb_private::ValueObject>&, lldb_private::Status&, unsigned int, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >*, std::__1::shared_ptr<lldb_private::Module>*) + 2689
25 LLDB 0x000000010bb73da5 lldb_private::REPL::IOHandlerInputComplete(lldb_private::IOHandler&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&) + 2949
26 LLDB 0x000000010b984296 lldb_private::IOHandlerEditline::Run() + 278
27 LLDB 0x000000010b9193d1 lldb_private::Debugger::ExecuteIOHandlers() + 97
28 LLDB 0x000000010b91d23d lldb_private::Debugger::IOHandlerThread(void*) + 29
29 LLDB 0x000000010bb9f1fb lldb_private::HostNativeThreadBase::ThreadCreateTrampoline(void*) + 155
30 LLDB 0x000000010cf5bdfb lldb_private::HostThreadMacOSX::ThreadCreateTrampoline(void*) + 155
31 libsystem_pthread.dylib 0x00007fff7bcf42eb _pthread_body + 126
32 libsystem_pthread.dylib 0x00007fff7bcf7249 _pthread_start + 66
33 libsystem_pthread.dylib 0x00007fff7bcf340d thread_start + 13 |
Environment
Xcode 11 beta 3
Additional Detail from JIRA
md5: 4da831baa79eee189c7475de2db8544d
Issue Description:
This crash seems to be only occurring in the REPL due to allowing redeclaration of variables and classes
Steps to trigger crash
Stack trace
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