[Bug 622106] Re: history expansion conflicts with variable expansion, maybe token parsing issue

[Launchpad Bug Tracker]

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

** Changed in: bash (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/622106

Title:
  history expansion conflicts with variable expansion, maybe token
  parsing issue

Status in “bash” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: bash

  $ cat /etc/issue
  Ubuntu 10.04.1 LTS \n \l

  
  $ echo $BASH_VERSION
  4.1.5(1)-release

  $ sleep 5 & pid=$!
  $ sleep 5 & pid=$!; echo $pid
  bash: !: event not found
  $ sleep 5 & pid=$! ; echo $pid
  3434
  $ (sleep 5 & pid=$!; echo $pid)
  bash: !: event not found
  $ (sleep 5 & pid=$\!; echo $pid)
  $!
  $ {sleep 5 & pid=$!; echo $pid;}
  bash: !: event not found
  $ 

  Seems like the workaround is to include whitespace after the $!,
  however that doesn't help existing scripts.

  $ aptitude show bash
  Package: bash
  Essential: yes
  State: installed
  Automatically installed: no
  Version: 4.1-2ubuntu3
  Priority: required
  Section: shells
  Maintainer: Ubuntu Developers <ubuntu-devel-discuss at lists.ubuntu.com>
  Uncompressed Size: 3,576k
  Depends: base-files (>= 2.1.12), debianutils (>= 2.15)
  PreDepends: dash, libc6 (>= 2.11), libncurses5 (>= 5.6+20071006-3)
  Recommends: bash-completion (>= 20060301-0)
  Suggests: bash-doc
  Conflicts: bash-completion (< 20060301-0)
  Replaces: bash-completion (< 20060301-0), bash-doc (<= 2.05-1)

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