[llvm-bugs] [Bug 44728] New: clang-10 -gdwarf-5 fails with WebAssembly output

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=44728

            Bug ID: 44728
           Summary: clang-10 -gdwarf-5 fails with WebAssembly output
           Product: libraries
           Version: 10.0
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: WebAssembly
          Assignee: unassignedbugs at nondot.org
          Reporter: ggreif at gmail.com
                CC: llvm-bugs at lists.llvm.org

Created attachment 23075
  --> https://bugs.llvm.org/attachment.cgi?id=23075&action=edit
Reproduction artefacts

-gdwarf-4 works
-gdwarf-5 crashes.

relevant snippet
```
6  libsystem_platform.dylib 0x00007ffee90d3d60 _sigtramp + 18446744071613513248
7  libLLVM.dylib            0x0000000109c5636e
llvm::DwarfDebug::finishUnitAttributes(llvm::DICompileUnit const*,
llvm::DwarfCompileUnit&) + 398
8  libLLVM.dylib            0x0000000109c54a70
llvm::DwarfDebug::getOrCreateDwarfCompileUnit(llvm::DICompileUnit const*) + 896
9  libLLVM.dylib            0x0000000109c573bb llvm::DwarfDebug::beginModule()
+ 1947
10 libLLVM.dylib            0x0000000109c2709d
llvm::AsmPrinter::doInitialization(llvm::Module&) + 1341
11 libLLVM.dylib            0x00000001096043a1
llvm::FPPassManager::doInitialization(llvm::Module&) + 49
12 libLLVM.dylib            0x0000000109604671
llvm::legacy::PassManagerImpl::run(llvm::Module&) + 593
13 libclang-cpp.dylib       0x00000001079a24df
clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions
const&, clang::CodeGenOptions const&, clang::TargetOptions const&,
clang::LangOptions const&, llvm::DataLayout const&, llvm::Module*,
clang::BackendAction, std::__1::unique_ptr<llvm::raw_pwrite_stream,
std::__1::default_delete<llvm::raw_pwrite_stream> >) + 14415
14 libclang-cpp.dylib       0x0000000107c66d44
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) + 1044
15 libclang-cpp.dylib       0x0000000106c6d513 clang::ParseAST(clang::Sema&,
bool, bool) + 659
16 libclang-cpp.dylib       0x000000010841adb8 clang::FrontendAction::Execute()
+ 168
```

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