llvm-project

21e436f7 - [LifetimeSafety] Recognize declarations nested under std namespace (#197604)

[LifetimeSafety] Recognize declarations nested under std namespace (#197604) Previously `isInStlNamespace()` only checked the immediate declaration context. This missed declarations nested below `std` through records or intermediate namespaces, such as `std::basic_string_view` constructors. This commit fixes the problem by walking the `DeclContext` chain in `isInStlNamespace`. Closes #197454