Crash while parsing lambda used as a default argument for the value of a forward class (original) (raw)

$ cat preprocessed.cc

struct a; void b(a c = [] { return c; });

$ clang -fsyntax-only -Wno-everything -xc++ preprocessed.cc preprocessed.cc:2:26: error: variable 'c' cannot be implicitly captured in a lambda with no capture-default specified 2 | void b(a c = [] { return c; }); | ^ preprocessed.cc:2:10: note: 'c' declared here 2 | void b(a c = [] { return c; }); | ^ preprocessed.cc:2:14: note: lambda expression begins here 2 | void b(a c = [] { return c; }); | ^ preprocessed.cc:2:15: note: capture 'c' by reference 2 | void b(a c = [] { return c; }); | ^ | &c preprocessed.cc:2:15: note: default capture by reference 2 | void b(a c = [] { return c; }); | ^ | &

Assertion:

clang: /usr/local/google/home/kadircet/repos/llvm/clang/lib/AST/RecordLayoutBuilder.cpp:3347: const ASTRecordLayout &clang::ASTContext::getASTRecordLayout(const RecordDecl *) const: Assertion `D && "Cannot get layout of forward declarations!"' failed.

Backtrace:

PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script. Stack dump: 0. Program arguments: /usr/local/google/home/kadircet/repos/llvm/build/bin/clang -fsyntax-only -std=c++20 -Wno-everything -xc++ preprocessed.cc

 preprocessed.cc:2:27: current parser token ';'

 preprocessed.cc:2:14: lambda expression parsing

 preprocessed.cc:2:17: in compound statement ('{}')

#0 0x000055bf226afd18 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /usr/local/google/home/kadircet/repos/llvm/llvm/lib/Support/Unix/Signals.inc:723:13 #1 0x000055bf226ad8de llvm::sys::RunSignalHandlers() /usr/local/google/home/kadircet/repos/llvm/llvm/lib/Support/Signals.cpp:106:18 #2 0x000055bf2261a6d6 HandleCrash /usr/local/google/home/kadircet/repos/llvm/llvm/lib/Support/CrashRecoveryContext.cpp:73:5 #3 0x000055bf2261a6d6 CrashRecoverySignalHandler(int) /usr/local/google/home/kadircet/repos/llvm/llvm/lib/Support/CrashRecoveryContext.cpp:390:51 #4 0x00007f2d83e5a510 (/lib/x86_64-linux-gnu/libc.so.6+0x3c510) #5 0x00007f2d83ea816c __pthread_kill_implementation ./nptl/pthread_kill.c:44:76 #6 0x00007f2d83e5a472 raise ./signal/../sysdeps/posix/raise.c:27:6 #7 0x00007f2d83e444b2 abort ./stdlib/abort.c:81:7 #8 0x00007f2d83e443d5 _nl_load_domain ./intl/loadmsgcat.c:1177:9 #9 0x00007f2d83e533a2 (/lib/x86_64-linux-gnu/libc.so.6+0x353a2) #10 0x000055bf26048f8b clang::ASTContext::getASTRecordLayout(clang::RecordDecl const*) const /usr/local/google/home/kadircet/repos/llvm/clang/lib/AST/RecordLayoutBuilder.cpp:3348:3 #11 0x000055bf25acf105 clang::ASTContext::getTypeInfoImpl(clang::Type const*) const /usr/local/google/home/kadircet/repos/llvm/clang/lib/AST/ASTContext.cpp:2288:37 #12 0x000055bf25ad0a49 clang::ASTContext::getTypeInfo(clang::Type const*) const /usr/local/google/home/kadircet/repos/llvm/clang/lib/AST/ASTContext.cpp:0:17 #13 0x000055bf25acf02f clang::ASTContext::getTypeInfoImpl(clang::Type const*) const /usr/local/google/home/kadircet/repos/llvm/clang/lib/AST/ASTContext.cpp:0:0 #14 0x000055bf25ad0a49 clang::ASTContext::getTypeInfo(clang::Type const*) const /usr/local/google/home/kadircet/repos/llvm/clang/lib/AST/ASTContext.cpp:0:17 #15 0x000055bf25ad12c9 operator QualType /usr/local/google/home/kadircet/repos/llvm/clang/include/clang/AST/CanonicalType.h:92:38 #16 0x000055bf25ad12c9 getCharWidth /usr/local/google/home/kadircet/repos/llvm/clang/include/clang/AST/ASTContext.h:2355:24 #17 0x000055bf25ad12c9 toCharUnitsFromBits /usr/local/google/home/kadircet/repos/llvm/clang/lib/AST/ASTContext.cpp:2417:44 #18 0x000055bf25ad12c9 clang::ASTContext::getTypeAlignInChars(clang::QualType) const /usr/local/google/home/kadircet/repos/llvm/clang/lib/AST/ASTContext.cpp:2437:10 #19 0x000055bf255b8c06 operator> /usr/local/google/home/kadircet/repos/llvm/clang/include/clang/AST/CharUnits.h:113:25 #20 0x000055bf255b8c06 clang::Sema::getNamedReturnInfo(clang::VarDecl const*) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Sema/SemaStmt.cpp:3359:32 #21 0x000055bf255b88f3 clang::Sema::getNamedReturnInfo(clang::Expr*&, clang::Sema::SimplerImplicitMoveMode) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Sema/SemaStmt.cpp:3293:25 #22 0x000055bf255bac05 clang::Sema::BuildReturnStmt(clang::SourceLocation, clang::Expr*, bool) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Sema/SemaStmt.cpp:3860:28 #23 0x000055bf255ba9d5 isInvalid /usr/local/google/home/kadircet/repos/llvm/clang/include/clang/Sema/Ownership.h:199:41 #24 0x000055bf255ba9d5 clang::Sema::ActOnReturnStmt(clang::SourceLocation, clang::Expr*, clang::Scope*) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Sema/SemaStmt.cpp:3822:9 #25 0x000055bf24ce2f93 clang::Parser::ParseReturnStatement() /usr/local/google/home/kadircet/repos/llvm/clang/lib/Parse/ParseStmt.cpp:2461:1 #26 0x000055bf24cdc889 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Parse/ParseStmt.cpp:330:11 #27 0x000055bf24cdb012 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Parse/ParseStmt.cpp:121:20 #28 0x000055bf24ce54d1 clang::Parser::ParseCompoundStatementBody(bool) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Parse/ParseStmt.cpp:1240:11 #29 0x000055bf24c61d4d clang::Parser::ParseLambdaExpressionAfterIntroducer(clang::LambdaIntroducer&) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Parse/ParseExprCXX.cpp:1617:19 #30 0x000055bf24c5e799 clang::Parser::ParseLambdaExpression() /usr/local/google/home/kadircet/repos/llvm/clang/lib/Parse/ParseExprCXX.cpp:817:10 #31 0x000055bf24c4e02e clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Parse/ParseExpr.cpp:0:13 #32 0x000055bf24c46fdc ParseCastExpression /usr/local/google/home/kadircet/repos/llvm/clang/lib/Parse/ParseExpr.cpp:0:20 #33 0x000055bf24c46fdc clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Parse/ParseExpr.cpp:182:20 #34 0x000055bf24cb55d7 clang::Parser::ParseParameterDeclarationClause(clang::DeclaratorContext, clang::ParsedAttributes&, llvm::SmallVectorImplclang::DeclaratorChunk::ParamInfo&, clang::SourceLocation&, bool) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Parse/ParseDecl.cpp:7998:26 #35 0x000055bf24cb1d8e clang::Parser::ParseFunctionDeclarator(clang::Declarator&, clang::ParsedAttributes&, clang::BalancedDelimiterTracker&, bool, bool) /usr/local/google/home/kadircet/repos/llvm/clang/include/clang/Parse/Parser.h:0:12 #36 0x000055bf24caf190 clang::Parser::ParseDirectDeclarator(clang::Declarator&) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Parse/ParseDecl.cpp:7156:9 #37 0x000055bf24cad2a4 clang::Parser::ParseDeclaratorInternal(clang::Declarator&, void (clang::Parser::)(clang::Declarator&)) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Parse/ParseDecl.cpp:0:7 #38 0x000055bf24d778af clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref<void ()>) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Sema/Sema.cpp:529:1 #39 0x000055bf24c9a24e SuppressAccessChecks /usr/local/google/home/kadircet/repos/llvm/clang/include/clang/Parse/RAIIObjectsForParser.h:54:11 #40 0x000055bf24c9a24e clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::Parser::ParsedTemplateInfo&, clang::SourceLocation, clang::Parser::ForRangeInit*) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Parse/ParseDecl.cpp:2267:24 #41 0x000055bf24c24d09 clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Parse/Parser.cpp:0:10 #42 0x000055bf24c24562 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Parse/Parser.cpp:1271:12 #43 0x000055bf24c23389 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Parse/Parser.cpp:0:14 #44 0x000055bf24c213b6 clang::Parser::ParseTopLevelDecl(clang::OpaquePtrclang::DeclGroupRef&, clang::Sema::ModuleImportState&) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Parse/Parser.cpp:763:10 #45 0x000055bf24c1c9de clang::ParseAST(clang::Sema&, bool, bool) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Parse/ParseAST.cpp:162:5 #46 0x000055bf23326e9f clang::FrontendAction::Execute() /usr/local/google/home/kadircet/repos/llvm/clang/lib/Frontend/FrontendAction.cpp:1082:10 #47 0x000055bf23293dad getPtr /usr/local/google/home/kadircet/repos/llvm/llvm/include/llvm/Support/Error.h:276:42 #48 0x000055bf23293dad operator bool /usr/local/google/home/kadircet/repos/llvm/llvm/include/llvm/Support/Error.h:239:16 #49 0x000055bf23293dad clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Frontend/CompilerInstance.cpp:1061:23 #50 0x000055bf2340cc5e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /usr/local/google/home/kadircet/repos/llvm/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:280:25 #51 0x000055bf1ff5f72f cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /usr/local/google/home/kadircet/repos/llvm/clang/tools/driver/cc1_main.cpp:232:15 #52 0x000055bf1ff5c00d ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) /usr/local/google/home/kadircet/repos/llvm/clang/tools/driver/driver.cpp:215:12 #53 0x000055bf230d2ad9 operator() /usr/local/google/home/kadircet/repos/llvm/clang/lib/Driver/Job.cpp:440:30 #54 0x000055bf230d2ad9 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optionalllvm::StringRef>, std::__cxx11::basic_string<char, std::char_traits, std::allocator>, bool) const::$_0>(long) /usr/local/google/home/kadircet/repos/llvm/llvm/include/llvm/ADT/STLFunctionalExtras.h:45:12 #55 0x000055bf2261a416 operator() /usr/local/google/home/kadircet/repos/llvm/llvm/include/llvm/ADT/STLFunctionalExtras.h:0:12 #56 0x000055bf2261a416 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) /usr/local/google/home/kadircet/repos/llvm/llvm/lib/Support/CrashRecoveryContext.cpp:426:3 #57 0x000055bf230d21d2 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optionalllvm::StringRef>, std::__cxx11::basic_string<char, std::char_traits, std::allocator>, bool) const /usr/local/google/home/kadircet/repos/llvm/clang/lib/Driver/Job.cpp:440:7 #58 0x000055bf2308a307 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const /usr/local/google/home/kadircet/repos/llvm/clang/lib/Driver/Compilation.cpp:199:15 #59 0x000055bf2308a847 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const /usr/local/google/home/kadircet/repos/llvm/clang/lib/Driver/Compilation.cpp:253:13 #60 0x000055bf230ab559 empty /usr/local/google/home/kadircet/repos/llvm/llvm/include/llvm/ADT/SmallVector.h:94:46 #61 0x000055bf230ab559 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) /usr/local/google/home/kadircet/repos/llvm/clang/lib/Driver/Driver.cpp:1942:23 #62 0x000055bf1ff5b50d clang_main(int, char**, llvm::ToolContext const&) /usr/local/google/home/kadircet/repos/llvm/clang/tools/driver/driver.cpp:391:21 #63 0x000055bf1ff6c077 main /usr/local/google/home/kadircet/repos/llvm/build/tools/clang/tools/driver/clang-driver.cpp:17:10 #64 0x00007f2d83e456ca __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:74:3 #65 0x00007f2d83e45785 call_init ./csu/../csu/libc-start.c:128:20 #66 0x00007f2d83e45785 __libc_start_main ./csu/../csu/libc-start.c:347:5 #67 0x000055bf1ff59961 _start (/usr/local/google/home/kadircet/repos/llvm/build/bin/clang+0x5465961) clang: error: clang frontend command failed with exit code 134 (use -v to see invocation) clang version 19.0.0git (git@github.com:kadircet/llvm-project.git 98ae27a0d303252a23891b204df18112a846f661) Target: x86_64-unknown-linux-gnu Thread model: posix InstalledDir: /usr/local/google/home/kadircet/repos/llvm/build/bin Build config: +assertions clang: note: diagnostic msg: