| Issue |
134285
|
| Summary |
`-fdebug-types-section -gdwarf-3` crashes Clang with assertions
|
| Labels |
clang,
crash-on-valid
|
| Assignees |
|
| Reporter |
cjdb
|
**Source**
```cpp
struct A {};
struct B { A a; };
namespace N { using ::A; }
```
**Invocation**
```
clang -fdebug-types-section -gdwarf-3 crash.cpp
```
**Output**
```
Invalid form for specified DWARF version
UNREACHABLE executed at /root/llvm-project/llvm/lib/CodeGen/AsmPrinter/DIE.cpp:84!
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: /opt/compiler-explorer/clang-assertions-20.1.0/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-14.2.0 -fcolor-diagnostics -fno-crash-diagnostics -fdebug-types-section -gdwarf-3 <source>
1. <eof> parser at end of file
2. Code generation
#0 0x0000000003e64af8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x3e64af8)
#1 0x0000000003e627b4 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x3e627b4)
#2 0x0000000003daec88 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x0000765056e42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x0000765056e969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x0000765056e42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x0000765056e287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x0000000003dba5ea (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x3dba5ea)
#8 0x0000000004d99d59 llvm::DIEAbbrev::Emit(llvm::AsmPrinter const*) const (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x4d99d59)
#9 0x0000000004d9a2f7 llvm::DIEAbbrevSet::Emit(llvm::AsmPrinter const*, llvm::MCSection*) const (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x4d9a2f7)
#10 0x0000000004dc9b23 llvm::DwarfDebug::endModule() (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x4dc9b23)
#11 0x0000000004d844cd llvm::AsmPrinter::doFinalization(llvm::Module&) (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x4d844cd)
#12 0x00000000037ac4dd llvm::FPPassManager::doFinalization(llvm::Module&) (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x37ac4dd)
#13 0x00000000037b6fd6 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x37b6fd6)
#14 0x00000000041224a0 clang::emitBackendOutput(clang::CompilerInstance&, clang::CodeGenOptions&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x41224a0)
#15 0x00000000047f7a50 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x47f7a50)
#16 0x000000000683fc7c clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x683fc7c)
#17 0x00000000047f7e58 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x47f7e58)
#18 0x0000000004abdd25 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x4abdd25)
#19 0x0000000004a407de clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x4a407de)
#20 0x0000000004babd8e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x4babd8e)
#21 0x0000000000cfe40f cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0xcfe40f)
#22 0x0000000000cf5e9a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#23 0x000000000483e749 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::'lambda'()>(long) Job.cpp:0:0
#24 0x0000000003daf134 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x3daf134)
#25 0x000000000483ed3f clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (.part.0) Job.cpp:0:0
#26 0x0000000004801bad clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x4801bad)
#27 0x0000000004802c2e clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x4802c2e)
#28 0x000000000480a765 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0x480a765)
#29 0x0000000000cfb213 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0xcfb213)
#30 0x0000000000bc3694 main (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0xbc3694)
#31 0x0000765056e29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#32 0x0000765056e29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#33 0x0000000000cf5945 _start (/opt/compiler-explorer/clang-assertions-20.1.0/bin/clang+++0xcf5945)
```
**Clang details**
```
clang version 20.1.0 (https://github.com/llvm/llvm-project.git 24a30daaa559829ad079f2ff7f73eb4e18095f88)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /opt/compiler-explorer/clang-assertions-20.1.0/bin
Build config: +assertions
ASM generation compiler returned: 0
clang version 20.1.0 (https://github.com/llvm/llvm-project.git 24a30daaa559829ad079f2ff7f73eb4e18095f88)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /opt/compiler-explorer/clang-assertions-20.1.0/bin
Build config: +assertions
Compiler did not produce an executable
Execution build compiler returned: 0
```
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