llvm-project.git/lldb/test/Shell/Process/Windows/msstl_smoke.cpp, branch main Unnamed repository; edit this file 'description' to name the repository. [LLDB] Avoid crashes when inspecting MSVC STL types (#140761) 2025-05-30T19:43:53+00:00 nerix nerixdev@outlook.de 2025-05-30T19:43:53+00:00 9e9626b3d5aa56828b71b03d99bf3167fdfeb08d When inspecting/printing types from MSVC's STL, LLDB would crash because it assumes these types were from libstdc++. Specifically, `std::shared_ptr` and `std::optional` would crash because of a null pointer dereference. I added a minimal test that tests the types with C++ helpers for libstdc++ (only tests for crashes). - Fixes #115216 - Fixes #120310 This still has one unresolved discussion: What about MS STL types? This is https://github.com/llvm/llvm-project/issues/24834, but there was a bit of discussion in #120310 as well. The main issue is that MSVC's STL uses the same type names as libstdc++ (i.e. neither uses an inline namespace like libc++ for some types). 
When inspecting/printing types from MSVC's STL, LLDB would crash because
it assumes these types were from libstdc++. Specifically,
`std::shared_ptr` and `std::optional` would crash because of a null
pointer dereference. I added a minimal test that tests the types with
C++ helpers for libstdc++ (only tests for crashes).

- Fixes #115216 
- Fixes #120310 

This still has one unresolved discussion: What about MS STL types? This
is https://github.com/llvm/llvm-project/issues/24834, but there was a
bit of discussion in #120310 as well. The main issue is that MSVC's STL
uses the same type names as libstdc++ (i.e. neither uses an inline
namespace like libc++ for some types).