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** Changed in: auctex (Debian)
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/790212

Title:
  "! File ended while scanning use of" error not handled correctly by
  TeX-next-error

Status in “auctex” package in Ubuntu:
  Confirmed
Status in “auctex” package in Debian:
  Fix Released

Bug description:
  Binary package hint: auctex

  If I run emacs -q and load the following file, ~/test.tex:

  \documentclass{beamer}
  \begin{document}
  \begin{frame}
    $a_{b$
  \end{frame}
  \end{document}

  and hit C-c C-c LaTeX RET, emacs says "LaTeX errors in `*~/test
  output'. Use C-c ` to display."

  Then I hit C-c ` and I expect one buffer called *TeX Help* to be
  created containing the "Missing } inserted" error, alongside the
  original test.tex buffer.

  But this doesn't happen: instead, two buffers are created: one called
  *TeX Help*, and a read-only buffer called Debian. Both are empty, and
  the minibuffer says: Search failed: "^l\\." These two buffers replace
  the test.tex buffer.

  Incidentally, if I go to the new Debian buffer and hit C-x C-w, the
  minibuffer says "Write file: ~/TeX Live 2009/", which I find rather
  curious.

  If I comment out the \begin{frame} and \end{frame} lines in test.tex,
  then I do get the expected behaviour.

  Version info:
  $ lsb_release -rd
  Description:	Ubuntu 10.04.2 LTS
  Release:	10.04
  $ apt-cache policy emacs23 auctex
  emacs23:
    Installed: 23.1+1-4ubuntu7.2
    Candidate: 23.1+1-4ubuntu7.2
    Version table:
   *** 23.1+1-4ubuntu7.2 0
          500 http://ftp.heanet.ie/pub/ubuntu/ lucid-updates/main Packages
          100 /var/lib/dpkg/status
       23.1+1-4ubuntu7 0
          500 http://ftp.heanet.ie/pub/ubuntu/ lucid/main Packages
  auctex:
    Installed: 11.85-1ubuntu1
    Candidate: 11.85-1ubuntu1
    Version table:
   *** 11.85-1ubuntu1 0
          500 http://ftp.heanet.ie/pub/ubuntu/ lucid/main Packages
          100 /var/lib/dpkg/status

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