(Re-posted from Stack Overflow <http://unix.stackexchange.com/questions/36751/why-are-parameters-to-bashs-builtin-optional>)
Running simply `builtin` prints nothing and returns exit code 0. This is in accordance with `help builtin`, which shows all parameters as optional. But why isn't this no-op an error? Is there a use case for this? A more useful result would be an error code or, even better, listing the currently available builtins. Cheers, V
