use proc_macro_error::*; #[test] #[should_panic = "proc-macro-error API cannot be used outside of"] fn missing_attr_emit() { emit_call_site_error!("You won't see me"); } #[test] #[should_panic = "proc-macro-error API cannot be used outside of"] fn missing_attr_abort() { abort_call_site!("You won't see me"); }