1 `#[track_caller]` requires functions to have the `"Rust"` ABI for implicitly
2 receiving caller location. See [RFC 2091] for details on this and other
5 Erroneous code example:
8 #![feature(track_caller)]
11 extern "C" fn foo() {}
14 [RFC 2091]: https://github.com/rust-lang/rfcs/blob/master/text/2091-inline-semantic.md