libgit.a isn't reentrant. It will call `die()` on many errors. If you link to it in a long running binary, it will kill your process on error.

Libgit2 is meant to address this and I was heavily involved in the development of that project 15 years ago. It's great but it's not feature complete and it's development is also completely separate from git development, so it's out of sync and constantly struggling to keep up.