[llvm-branch-commits] [clang] [Serialization] Code cleanups and polish 83233 (PR #83237)

[Ilya Biryukov via llvm-branch-commits]

ilya-biryukov wrote:

Here is the reproducer. Like before, builds at head and fails with the patch applied. After unpacking the archive just run
```
$ CLANGPP=<path-to-clang++> ./build.sh
```

Note the comment in `build.sh` about the system libc++ required for it (libc++ 17 worked, 15 and 16 did not).
[containers.tgz](https://github.com/user-attachments/files/16728578/containers.tgz)

Let me know if this reproduces for you.

https://github.com/llvm/llvm-project/pull/83237