use tracerr::Traced;

let err = tracerr::new!("my error"); // captures frame

let res: Result<(), _> = Err(err)
    .map_err(tracerr::wrap!()); // captures frame

let err: Traced<&'static str> = res.unwrap_err();
# #[cfg(not(target_os = "windows"))]
assert_eq!(
    format!("{}\n{}", err, err.trace()),
    r"my error
error trace:
rust_out
  at src/lib.rs:6
rust_out
  at src/lib.rs:9",
);

let (val, trace) = err.split();
# #[cfg(not(target_os = "windows"))]
assert_eq!(
    format!("{}\n{}", val, trace),
    r"my error
error trace:
rust_out
  at src/lib.rs:6
rust_out
  at src/lib.rs:9",
);