`clang-format` crashes my macOS (M3 Pro; 36GB of RAM)

Replicate:

[c-multiplatform.zip](https://github.com/user-attachments/files/31341347/c-multiplatform.zip)

```sh
$ git reset --soft HEAD~1
$ fd -eh -ec -x clang-format --style=LLVM -i
```

The program can crash or whatever but here my entire machine freezes and I have to hold down the power button until it turns off.

Download c-multiplatform.zip and reproduce the freeze with `fd -eh -ec -x clang-format --style=LLVM -i` after the stated `git reset --soft HEAD~1`. Start by determining whether the failure is specific to the supplied C project, the LLVM style, or macOS; done means the command no longer freezes the machine or otherwise crashes.

Written by the indexing model from the issue text.