| Issue |
153800
|
| Summary |
clang crash, possibly related to templating of std::variant, isHorizontalWhitespace LexTokenInternal Preprocessor::Lex
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
sparr
|
I had not modified the body of `JsonObject::get_member_opt` when I encountered this crash. The most recent change prior to this crash was implementing `template< typename T1, typename T2 > bool JsonValue::read( std::variant<T1, T2> &v, bool throw_on_error ) const`, although it is possible I made some other change since the previous successful compile.
```
Stack dump:
0. Program arguments: /usr/lib/llvm18/bin/clang++ -Og -Xclang -fno-pch-timestamp -Wall -Wextra -Wformat-signedness -Wlogical-op -Wmissing-declarations -Wmissing-noreturn -Wpedantic -Wunused-macros -Wredundant-decls -g -fsigned-char -pthread -pthread -std=c++17 -Wnon-virtual-dtor -Wold-style-cast -Woverloaded-virtual -Wsuggest-override -Wzero-as-null-pointer-constant -Wno-unknown-warning-option -Wno-dangling-reference -Wno-c++20-compat -Winvalid-pch -Werror -Isrc -isystem src/third-party -DZSTD_STATIC_LINKING_ONLY -DZSTD_DISABLE_ASM -DGIT_VERSION -DTILES -I/usr/include/SDL2 -D_GNU_SOURCE=1 -D_REENTRANT -I/usr/include/SDL2 -DHWY_SHARED_DEFINE -DAVIF_DLL -I/usr/include/rav1e -I/usr/include/svt-av1 -DEB_DLL -I/usr/include/webp -D_GNU_SOURCE=1 -D_REENTRANT -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/harfbuzz -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/sysprof-6 -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/harfbuzz -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/sysprof-6 -I/usr/include/SDL2 -D_GNU_SOURCE=1 -D_REENTRANT -DSDL_SOUND -include-pch pch/main-pch.hpp.pch -fpch-preprocess -c -MMD -MP -fcolor-diagnostics -o obj/tiles/catacharset.o src/catacharset.cpp
1. <unknown> parser at unknown location
2. src/flexbuffer_json-inl.h:1061:1: parsing function body 'JsonObject::get_member_opt'
3. src/flexbuffer_json-inl.h:1061:1: in compound statement ('{}')
#0 0x00007fca349ca540 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /usr/src/debug/llvm18/llvm-18.1.8.src/lib/Support/Unix/Signals.inc:723:22
#1 0x00007fca349c79f5 llvm::sys::RunSignalHandlers() /usr/src/debug/llvm18/llvm-18.1.8.src/lib/Support/Signals.cpp:105:20
#2 0x00007fca349c79f5 llvm::sys::CleanupOnSignal(unsigned long) /usr/src/debug/llvm18/llvm-18.1.8.src/lib/Support/Unix/Signals.inc:367:31
#3 0x00007fca348ab2d9 HandleCrash /usr/src/debug/llvm18/llvm-18.1.8.src/lib/Support/CrashRecoveryContext.cpp:73:5
#4 0x00007fca348ab2d9 CrashRecoverySignalHandler /usr/src/debug/llvm18/llvm-18.1.8.src/lib/Support/CrashRecoveryContext.cpp:390:62
#5 0x00007fca33c4def0 (/usr/lib/libc.so.6+0x3def0)
#6 0x00007fca3c92a14d clang::isHorizontalWhitespace(unsigned char) /usr/src/debug/clang18/clang-18.1.8.src/include/clang/Basic/CharInfo.h:78:22
#7 0x00007fca3c92a14d clang::Lexer::LexTokenInternal(clang::Token&, bool) /usr/src/debug/clang18/clang-18.1.8.src/lib/Lex/Lexer.cpp:3668:29
#8 0x00007fca3c9556cc clang::Preprocessor::Lex(clang::Token&) /usr/src/debug/clang18/clang-18.1.8.src/lib/Lex/Preprocessor.cpp:869:10
#9 0x00007fca3c935ff8 clang::Preprocessor::CachingLex(clang::Token&) /usr/src/debug/clang18/clang-18.1.8.src/lib/Lex/PPCaching.cpp:65:3
#10 0x00007fca3c935ff8 clang::Preprocessor::CachingLex(clang::Token&) /usr/src/debug/clang18/clang-18.1.8.src/lib/Lex/PPCaching.cpp:48:6
#11 0x00007fca3c935ff8 clang::Preprocessor::CLK_CachingLexer(clang::Preprocessor&, clang::Token&) /usr/src/debug/clang18/clang-18.1.8.src/include/clang/Lex/Preprocessor.h:2920:17
#12 0x00007fca3c9556cc clang::Preprocessor::Lex(clang::Token&) /usr/src/debug/clang18/clang-18.1.8.src/lib/Lex/Preprocessor.cpp:869:10
#13 0x00007fca3ca5dfd3 clang::Parser::TryConsumeToken(clang::tok::TokenKind) /usr/src/debug/clang18/clang-18.1.8.src/include/clang/Parse/Parser.h:528:11
#14 0x00007fca3ca5dfd3 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) /usr/src/debug/clang18/clang-18.1.8.src/lib/Parse/ParseStmt.cpp:519:23
#15 0x00007fca3ca5e2b8 llvm::SmallVectorBase<unsigned int>::empty() const /usr/lib/llvm18/include/llvm/ADT/SmallVector.h:94:46
#16 0x00007fca3ca5e2b8 clang::Parser::MaybeDestroyTemplateIds() /usr/src/debug/clang18/clang-18.1.8.src/include/clang/Parse/Parser.h:315:27
#17 0x00007fca3ca5e2b8 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) /usr/src/debug/clang18/clang-18.1.8.src/lib/Parse/ParseStmt.cpp:120:26
#18 0x00007fca3ca63b6a clang::Parser::ParseCompoundStatementBody(bool) /usr/src/debug/clang18/clang-18.1.8.src/lib/Parse/ParseStmt.cpp:1236:38
#19 0x00007fca3ca65b34 clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) /usr/src/debug/clang18/clang-18.1.8.src/lib/Parse/ParseStmt.cpp:2517:3
#20 0x00007fca3ca66c9f clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) /usr/src/debug/clang18/clang-18.1.8.src/lib/Parse/Parser.cpp:1516:36
#21 0x00007fca3c9c4570 clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::SourceLocation*, clang::Parser::ForRangeInit*) /usr/src/debug/clang18/clang-18.1.8.src/lib/Parse/ParseDecl.cpp:2272:50
#22 0x00007fca3ca50793 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) /usr/src/debug/clang18/clang-18.1.8.src/lib/Parse/Parser.cpp:1266:42
#23 0x00007fca3ca69532 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) /usr/src/debug/clang18/clang-18.1.8.src/lib/Parse/Parser.cpp:1070:50
#24 0x00007fca3ca6a14b clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) /usr/src/debug/clang18/clang-18.1.8.src/lib/Parse/Parser.cpp:760:36
#25 0x00007fca3c98cdf8 clang::ParseAST(clang::Sema&, bool, bool) /usr/src/debug/clang18/clang-18.1.8.src/lib/Parse/ParseAST.cpp:162:69
#26 0x00007fca3e463971 clang::FrontendAction::Execute() /usr/src/debug/clang18/clang-18.1.8.src/lib/Frontend/FrontendAction.cpp:1069:21
#27 0x00007fca3e404617 llvm::Error::getPtr() const /usr/lib/llvm18/include/llvm/Support/Error.h:279:0
#28 0x00007fca3e404617 llvm::Error::operator bool() /usr/lib/llvm18/include/llvm/Support/Error.h:239:0
#29 0x00007fca3e404617 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /usr/src/debug/clang18/clang-18.1.8.src/lib/Frontend/CompilerInstance.cpp:1057:0
#30 0x00007fca3e4bc0fd std::__shared_ptr<clang::FrontendOptions, (__gnu_cxx::_Lock_policy)2>::get() const /usr/include/c++/14.2.1/bits/shared_ptr_base.h:1667:0
#31 0x00007fca3e4bc0fd std::__shared_ptr_access<clang::FrontendOptions, (__gnu_cxx::_Lock_policy)2, false, false>::_M_get() const /usr/include/c++/14.2.1/bits/shared_ptr_base.h:1364:0
#32 0x00007fca3e4bc0fd std::__shared_ptr_access<clang::FrontendOptions, (__gnu_cxx::_Lock_policy)2, false, false>::operator*() const /usr/include/c++/14.2.1/bits/shared_ptr_base.h:1350:0
#33 0x00007fca3e4bc0fd clang::CompilerInvocation::getFrontendOpts() /usr/src/debug/clang18/clang-18.1.8.src/include/clang/Frontend/CompilerInvocation.h:254:0
#34 0x00007fca3e4bc0fd clang::CompilerInstance::getFrontendOpts() /usr/src/debug/clang18/clang-18.1.8.src/include/clang/Frontend/CompilerInstance.h:291:0
#35 0x00007fca3e4bc0fd clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /usr/src/debug/clang18/clang-18.1.8.src/lib/FrontendTool/ExecuteCompilerInvocation.cpp:273:0
#36 0x00005645bca18384 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /usr/src/debug/clang18/clang-18.1.8.src/tools/driver/cc1_main.cpp:294:40
#37 0x00005645bca1c6ea ExecuteCC1Tool /usr/src/debug/clang18/clang-18.1.8.src/tools/driver/driver.cpp:365:20
#38 0x00007fca3e139485 operator() /usr/src/debug/clang18/clang-18.1.8.src/lib/Driver/Job.cpp:440:32
#39 0x00007fca3e139485 callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef> >, std::string*, bool*) const::<lambda()> > /usr/lib/llvm18/include/llvm/ADT/STLFunctionalExtras.h:45:52
#40 0x00007fca348ab72a llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) /usr/src/debug/llvm18/llvm-18.1.8.src/lib/Support/CrashRecoveryContext.cpp:428:1
#41 0x00007fca3e13be16 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const /usr/src/debug/clang18/clang-18.1.8.src/lib/Driver/Job.cpp:444:10
#42 0x00007fca3e0f6d79 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const /usr/src/debug/clang18/clang-18.1.8.src/lib/Driver/Compilation.cpp:200:3
#43 0x00007fca3e0f717c clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const /usr/src/debug/clang18/clang-18.1.8.src/lib/Driver/Compilation.cpp:253:5
#44 0x00007fca3e1157e4 llvm::SmallVectorBase<unsigned int>::empty() const /usr/lib/llvm18/include/llvm/ADT/SmallVector.h:94:0
#45 0x00007fca3e1157e4 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) /usr/src/debug/clang18/clang-18.1.8.src/lib/Driver/Driver.cpp:1921:0
#46 0x00005645bca1f045 llvm::SmallVectorBase<unsigned int>::size() const /usr/lib/llvm18/include/llvm/ADT/SmallVector.h:91:32
#47 0x00005645bca1f045 llvm::SmallVectorTemplateCommon<std::pair<int, clang::driver::Command const*>, void>::end() /usr/lib/llvm18/include/llvm/ADT/SmallVector.h:282:41
#48 0x00005645bca1f045 clang_main(int, char**, llvm::ToolContext const&) /usr/src/debug/clang18/clang-18.1.8.src/tools/driver/driver.cpp:542:26
#49 0x00005645bca0ffd5 main /usr/src/debug/clang18/clang-18.1.8.src/build/tools/driver/clang-driver.cpp:18:1
#50 0x00007fca33c376b5 (/usr/lib/libc.so.6+0x276b5)
#51 0x00007fca33c37769 __libc_start_main (/usr/lib/libc.so.6+0x27769)
#52 0x00005645bca10035 _start (/usr/lib/llvm18/bin/clang+++0xb035)
clang++: error: clang frontend command failed with exit code 135 (use -v to see invocation)
clang version 18.1.8
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/lib/llvm18/bin
clang++: note: diagnostic msg:
********************
PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang++: note: diagnostic msg: /tmp/catacharset-773ed3.cpp
clang++: note: diagnostic msg: /tmp/catacharset-773ed3.sh
clang++: note: diagnostic msg:
********************
```
[catacharset-773ed3.cpp.gz](https://github.com/user-attachments/files/21795273/catacharset-773ed3.cpp.gz)
[catacharset-773ed3.sh.gz](https://github.com/user-attachments/files/21795280/catacharset-773ed3.sh.gz)
Github rejected my attempts to upload the files uncompressed.
![]()
_______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
