Function test_try_borrow_mut_while_borrow

tests/test_sharedref.rs:117–122

()

#[test]
fn test_try_borrow_mut_while_borrow() {
    let (gil, owner) = prepare_env();
    let py = gil.python();
    let _ref = owner.string(py).borrow();
    assert!(owner.string(py).try_borrow_mut().is_err());
}

#[test]
#[should_panic(expected = "already borrowed")]