[Bug 778627] Re: In natty, bash completion now quotes shell variable references rather than expanding them

[Axel Beckert]

Interestingly I can reproduce this issue only on some machines, but not
on all of them despite they all have bash 4.2.

I could reproduce it on Natty and Precise, on Debian Wheezy, and on one,
but not on all of my Debian Sid boxes (4.2-5).

Disabling the sourcing of /etc/bash_completion (either manually enabled
in /etc/bash.bashrc or ~/.bashrc) made the problem vanish on Debian and
on Natty, but not on Precise. Even purging bash-completion did not help
on Precise.

And that's not all: While on precise using "bash --rcfile /dev/null"
still did not fix the issue, it brought the issue back on Natty. And on
Debian Sid it still worked as expected, i.e. did not add any backslash.

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https://bugs.launchpad.net/bugs/778627

Title:
  In natty, bash completion now quotes shell variable references rather
  than expanding them

Status in “bash” package in Ubuntu:
  Confirmed
Status in “bash” package in Debian:
  Unknown
Status in “bash” package in Fedora:
  New

Bug description:
  Binary package hint: bash

  ~$ mkdir -p /tmp/testd/finger/toe
  /tmp$ cd /tmp/testd
  /tmp/testd$ td=`pwd`
  /tmp/testd$ cd ../
  /tmp$ ls $td/fing

  Type a TAB character at this point, and bash completion makes the line:
  /tmp$ ls \$td/finger 

  Note that while 'fing' has been expanded to 'finger ' (with a space at the end), the $td variable reference has had the
  $ character quoted with a backslash.  This prevents further extension of the pathname, and in fact makes
  the command invalid; if I type a newline at this point, I get:
  ls: cannot access $td/finger: No such file or directory

  This is not useful behavior.  I believe that in Ubuntu 10.10, the $td variable would have been expanded
  to  '/tmp/testd', and subsequent completions starting from '/tmp/testd/finger' would have worked.

  
  [The version of /etc/bash_completion.d/acroread.sh that is installed starts with:

  # _filedir : to handle file and directories with spaces in their names.
  if ! type _filedir &> /dev/null ; then

  so I don't think that file is overriding /etc/bash_completion's
  _filedir ...]

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: bash 4.2-0ubuntu3
  ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
  Uname: Linux 2.6.38-8-generic x86_64
  Architecture: amd64
  Date: Fri May  6 09:48:29 2011
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
  ProcEnviron:
   SHELL=/bin/bash
   PATH=(custom, user)
   LANG=en_US.UTF-8
   LANGUAGE=en_US:en
  SourcePackage: bash
  UpgradeStatus: Upgraded to natty on 2011-04-30 (6 days ago)

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