Crash in dpkg-query

Executing

             dpkg-query --show --showformat='' package

causes dpkg to crash on Kubuntu 12.10 amd64, dpkg --version = "Debian `dpkg' package management program version 1.16.7 (amd64)."

Output upon crash:

*** glibc detected *** dpkg-query: free(): invalid pointer: 0x00007fede7485314 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x7eb96)[0x7fede7487b96]
dpkg-query[0x4091a3]
dpkg-query[0x404473]
dpkg-query[0x402779]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed)[0x7fede742a76d]
dpkg-query[0x4027ed]
======= Memory map: ========
00400000-0041f000 r-xp 00000000 fc:00 491671 /usr/bin/dpkg-query
0061e000-0061f000 r--p 0001e000 fc:00 491671 /usr/bin/dpkg-query
0061f000-00620000 rw-p 0001f000 fc:00 491671 /usr/bin/dpkg-query
00620000-00734000 rw-p 00000000 00:00 0
0175d000-0177e000 rw-p 00000000 00:00 0 [heap]
7fede6f2a000-7fede6f3f000 r-xp 00000000 fc:00 4063531 /lib/x86_64-linux-gnu/libgcc_s.so.1
7fede6f3f000-7fede713e000 ---p 00015000 fc:00 4063531 /lib/x86_64-linux-gnu/libgcc_s.so.1
7fede713e000-7fede713f000 r--p 00014000 fc:00 4063531 /lib/x86_64-linux-gnu/libgcc_s.so.1
7fede713f000-7fede7140000 rw-p 00015000 fc:00 4063531 /lib/x86_64-linux-gnu/libgcc_s.so.1
7fede7140000-7fede7409000 r--p 00000000 fc:00 304558 /usr/lib/locale/locale-archive
7fede7409000-7fede75be000 r-xp 00000000 fc:00 4064246 /lib/x86_64-linux-gnu/libc-2.15.so
7fede75be000-7fede77bd000 ---p 001b5000 fc:00 4064246 /lib/x86_64-linux-gnu/libc-2.15.so
7fede77bd000-7fede77c1000 r--p 001b4000 fc:00 4064246 /lib/x86_64-linux-gnu/libc-2.15.so
7fede77c1000-7fede77c3000 rw-p 001b8000 fc:00 4064246 /lib/x86_64-linux-gnu/libc-2.15.so
7fede77c3000-7fede77c8000 rw-p 00000000 00:00 0
7fede77c8000-7fede77ea000 r-xp 00000000 fc:00 4064260 /lib/x86_64-linux-gnu/ld-2.15.so
7fede79c6000-7fede79c9000 rw-p 00000000 00:00 0
7fede79e7000-7fede79ea000 rw-p 00000000 00:00 0
7fede79ea000-7fede79eb000 r--p 00022000 fc:00 4064260 /lib/x86_64-linux-gnu/ld-2.15.so
7fede79eb000-7fede79ed000 rw-p 00023000 fc:00 4064260 /lib/x86_64-linux-gnu/ld-2.15.so
7fff8e98a000-7fff8e9ab000 rw-p 00000000 00:00 0 [stack]
7fff8e9cb000-7fff8e9cc000 r-xp 00000000 00:00 0 [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]
Aborted (core dumped)