[Bug 1752850] [NEW] bash-completion script prevent direxpand to be effective

[jean paul]

Public bug reported:

I am submitting after verifying it is really a bug by asking a question
in askubuntu: https://askubuntu.com/questions/1010931/direxpand-
unexpected-behavior

With the default bash, bash option `direxpand` is unset by default:

    shopt direxpand
    direxpand      	off

So normally when I type:

    proc=/proc
    ls $proc/<tab>

I should see no expansion, but I see

    ls /proc/

After investigation it is the bash-completion script which overide
direxpand. I do not know if this could be avoided...

version: Ubuntu 16.04.3 LTS

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: bash 4.3-14ubuntu1.2
ProcVersionSignature: Ubuntu 4.10.0-28.32~16.04.2-generic 4.10.17
Uname: Linux 4.10.0-28-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Mar  2 06:08:05 2018
ExecutablePath: /bin/bash
InstallationDate: Installed on 2017-08-04 (209 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
SourcePackage: bash
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: bash (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1752850

Title:
  bash-completion script prevent direxpand to be effective

Status in bash package in Ubuntu:
  New

Bug description:
  I am submitting after verifying it is really a bug by asking a
  question in askubuntu: https://askubuntu.com/questions/1010931
  /direxpand-unexpected-behavior

  With the default bash, bash option `direxpand` is unset by default:

      shopt direxpand
      direxpand      	off

  So normally when I type:

      proc=/proc
      ls $proc/<tab>

  I should see no expansion, but I see

      ls /proc/

  After investigation it is the bash-completion script which overide
  direxpand. I do not know if this could be avoided...

  version: Ubuntu 16.04.3 LTS

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: bash 4.3-14ubuntu1.2
  ProcVersionSignature: Ubuntu 4.10.0-28.32~16.04.2-generic 4.10.17
  Uname: Linux 4.10.0-28-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.10
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Mar  2 06:08:05 2018
  ExecutablePath: /bin/bash
  InstallationDate: Installed on 2017-08-04 (209 days ago)
  InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
  SourcePackage: bash
  UpgradeStatus: No upgrade log present (probably fresh install)

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