2 Checks for arm which matches all errors with `Err(_)`
3 and take drastic actions like `panic!`.
6 It is generally a bad practice, similar to
7 catching all exceptions in java with `catch(Exception)`
11 let x: Result<i32, &str> = Ok(3);
13 Ok(_) => println!("ok"),
14 Err(_) => panic!("err"),