Function new

crates/core/tests/tests.rs:84–90

()

#[test]
fn new() {
    let mut error = Error::new(TestError(42));
    assert!(error.is::<TestError>());
    assert_eq!(error.downcast_ref::<TestError>().unwrap().0, 42);
    error.downcast_mut::<TestError>().unwrap().0 += 1;
    assert_eq!(error.downcast_ref::<TestError>().unwrap().0, 43);
}

#[test]
fn new_drops() {