Comment 0 for bug 1775043

bash completion, defined in /usr/share/bash-completion/completions/ufw, doesn't work: the completion is not dynamically loaded, because it uses deprecated helper function have().

According to /usr/share/bash-completions/bash_completion, which defines the helper functions:

# Backwards compatibility for compat completions that use have().
# @deprecated should no longer be used; generally not needed with dynamically
# loaded completions, and _have is suitable for runtime use.

and at the end of the file:

unset -f have
unset have

which means: function have() is not available for usage. The bash completion for ufw conditionally defines _ufw and the comspec:

have ufw &&
_ufw()
...

[ "$have" ] && complete -F _ufw ufw

These should be changed to:

_have ufw &&
_ufw()
...

_have ufw && complete -F _ufw ufw

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ufw 0.35-5
ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
Uname: Linux 4.15.0-22-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.1
Architecture: amd64
CurrentDesktop: XFCE
Date: Mon Jun 4 14:34:11 2018
InstallationDate: Installed on 2018-04-28 (37 days ago)
InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
SourcePackage: ufw
UpgradeStatus: No upgrade log present (probably fresh install)