3afd111489
KCFI: Require -C panic=abort While the KCFI scheme is not incompatible with unwinding, LLVM's `invoke` instruction does not currently support KCFI bundles. While it likely will in the near future, we won't be able to assume that in Rust for a while. We encountered this problem while [turning on closure support](https://github.com/rust-lang/rust/pull/123106#issuecomment-2027436640). r? ``@workingjubilee``