vendor/backtrace/tests/accuracy/auxiliary.rs

#[inline(never)]
pub fn callback<F>(f: F) where F: FnOnce((&'static str, u32)) {
    f((file!(), line!()))
}

#[inline(always)]
pub fn callback_inlined<F>(f: F) where F: FnOnce((&'static str, u32)) {
    f((file!(), line!()))
}