[llvm] Fix crash due to un-checked error in LVReaderHandler::handleArchive method (PR #118951)

[via llvm-commits]

aurelien35 wrote:

I've extended the llvm/unittests/DebugInfo/LogicalView/CodeViewReaderTest.cpp unit test with a unit test to load a library file.

Without the merge request, it fails.
With it, it succeed.

I've made the .lib file using the "lib.exe" tool from msvc on the "llvm/unittests/DebugInfo/LogicalView/Inputs/test-codeview-msvc.o" file.

I'm investigating further for other bugs concerning MSVC static libraries debug info loading.

Do you know who can I contact about the MSVC CodeView information parsing specific topic? 

https://github.com/llvm/llvm-project/pull/118951