invokation with -h doesn't correpond to usage instructions

[Karl-Philipp Richter]

Invoking `disown --help` displays usage instructions

    $ disown --help
    bash: disown: --: invalid option
    disown: usage: disown [-h] [-ar] [jobspec ...]

but invocation of `disown -h` displays

    bash: disown: current: no such job

which is inconsistent.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: bash 4.3-11ubuntu1
Uname: Linux 3.19.0-031900rc1-generic x86_64
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Dec 24 20:35:20 2014
SourcePackage: bash
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[John Samuel (johnsamuel)]

This feature is desirable for all other builtins. It looks like builtins only use the short versions of options and not the long versions.

Reference: https://sources.debian.net/src/bash/4.3-12/builtins/jobs.def/#L242
....
while ((opt = internal_getopt (list, "ahr")) != -1)
    {
      switch (opt)
....