Package: apt
Version: 0.9.16.1
Severity: normal

/etc/kernel/postinst.d/apt-auto-removal is run when installing a new
linux-image package.  A package list is generated at some point, and
version numbers extracted:

        dpkg -l | awk '/^ii[ ]+(linux|kfreebsd|gnumach)-image-[0-9]*/ && $2 !~ 
/-dbg$/ { print $2 }' | sed -e 's#\(linux\|kfreebsd\|gnumach\)-image-##'

produces this list:

        3.11-2-amd64
        3.12-1-amd64
        3.13-1-amd64
        amd64

Internal function `version_test_gt' is then called (inside a `for'
loop) to set two variables ('latest_version' and 'previous_version').
When it comes to the last list member (see list above), a warning
shows up:

      dpkg: warning: version 'amd64' has bad syntax: version number does not 
start with digit

The patch bellow keeps odd things away from being thrown at `dpkg
--compare-versions':

--- apt-auto-removal.orig       2014-03-14 10:03:02.000000000 +0100
+++ apt-auto-removal    2014-03-20 19:42:02.337443101 +0100
@@ -46,6 +46,11 @@
 latest_version=""
 previous_version=""
 for i in $list; do
+       case $i in
+               [!0-9]*)
+                       continue
+                       ;;
+       esac
        if version_test_gt "$i" "$latest_version"; then
                previous_version="$latest_version"
                latest_version="$i"

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

Kernel: Linux 3.13-1-amd64 (SMP w/8 CPU cores)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash

Versions of packages apt depends on:
ii  debian-archive-keyring  2012.4
ii  gnupg                   1.4.16-1.1
ii  libapt-pkg4.12          0.9.16.1
ii  libc6                   2.18-4
ii  libgcc1                 1:4.8.2-16
ii  libstdc++6              4.8.2-16

apt recommends no packages.

Versions of packages apt suggests:
ii  apt-doc                      0.9.16.1
pn  aptitude | synaptic | wajig  <none>
ii  dpkg-dev                     1.17.6
ii  python-apt                   0.9.3.4

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