[libcxx-commits] [libcxx] [libc++] Remove UB from `std::__tree_node` construction (PR #153908)

[Nikolas Klauser via libcxx-commits]

philnik777 wrote:

> @vinay-deshmukh I modified the title and description to conclude the changes more clearly and associate this PR with the corresponding issue. Please double check the changes.

`__hash_node` doesn't contain UB anymore AFAICT. This patch only modifies it so both are implemented similarly.

https://github.com/llvm/llvm-project/pull/153908