Bug#700354: info: segfault on tab completion on large terminals

[Peter De Wachter <pdewacht@gmail.com>]

Package: info
Version: 4.13.95.dfsg.1-1
Severity: normal

This version of info sometimes crashes when using tab completion. It only
happens with some info files, and seemingly only on large terminals. This
doesn't occur with the version from unstable (4.13a.dfsg.1-10).

To reproduce, take large terminal, for example:

	$ echo $LINES $COLUMNS
	64 208

Start info with the make info file from make-doc 3.81-5.1:

	$ info make

Enter these keystrokes:

	i p TAB TAB

Result: segfault.

-- System Information:
Debian Release: 7.0
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.2.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=nl_BE.UTF-8, LC_CTYPE=nl_BE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages info depends on:
ii  install-info  4.13a.dfsg.1-10
ii  libc6         2.13-38
ii  libtinfo5     5.9-10

info recommends no packages.

Versions of packages info suggests:
pn  texinfo-doc-nonfree  <none>

-- no debconf information