[libcxx-commits] [libcxx] [libc++] Fix missing 'get_new_handler()' for Windows builds (PR #150182)

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siradam7th wrote:

Since https://github.com/llvm/llvm-project/pull/173451 was merged, I've resolved the conflict by moving the changes to the new test file.

https://github.com/llvm/llvm-project/pull/150182