apt-get dist-upgrade crashed in pkgPolicy::GetCandidateVer()

[Rouslan Solomakhin]

Description: Ubuntu 9.04
Release: 9.04

apt:
  Installed: 0.7.20.2ubuntu5
  Candidate: 0.7.20.2ubuntu5
  Version table:
 *** 0.7.20.2ubuntu5 0
        500 http://us.archive.ubuntu.com jaunty/main Packages
        100 /var/lib/dpkg/status

# apt-get dist-upgrade
Reading package lists... Done
Segmentation fault (core dumped)
# gdb apt-get dist-upgrade
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu"...
(no debugging symbols found)
/home/rvs/dist-upgrade: No such file or directory.
(gdb) run dist-upgrade
Starting program: /usr/bin/apt-get dist-upgrade
Reading package lists... Done
Building dependency tree... 0%
Program received signal SIGSEGV, Segmentation fault.
0x00007fd140d40922 in pkgPolicy::GetCandidateVer ()
   from /usr/lib/libapt-pkg-libc6.9-6.so.4.7
(gdb) bt full
#0 0x00007fdc7c3b1922 in pkgPolicy::GetCandidateVer () from /usr/lib/libapt-pkg-libc6.9-6.so.4.7
No symbol table info available.
#1 0x00007fdc7c390f31 in pkgDepCache::Init () from /usr/lib/libapt-pkg-libc6.9-6.so.4.7
No symbol table info available.
#2 0x00007fdc7c3af84b in pkgCacheFile::Open () from /usr/lib/libapt-pkg-libc6.9-6.so.4.7
No symbol table info available.
#3 0x000000000041416b in ?? ()
No symbol table info available.
#4 0x00007fdc7c37e945 in CommandLine::DispatchArg () from /usr/lib/libapt-pkg-libc6.9-6.so.4.7
No symbol table info available.
#5 0x000000000040d3a5 in ?? ()
No symbol table info available.
#6 0x00007fdc7b64f5a6 in __libc_start_main (main=0x40d160 <_Z7GetLockSsb@plt+28080>, argc=2, ubp_av=0x7fff8482d448, init=0x416c80, fini=<value optimized out>,
    rtld_fini=<value optimized out>, stack_end=0x7fff8482d438) at libc-start.c:220
        result = <value optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {4287616, -1032624240407130876, 4219840, 140735416554560, 0, 0, 1032565374779084036, 1014320851045141764},
      mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x2, 0x40d160}, data = {prev = 0x0, cleanup = 0x0, canceltype = 2}}}
        not_first_call = <value optimized out>
#7 0x00000000004063e9 in ?? ()
No symbol table info available.
----------snip----------
#13 0x0000000000000000 in ?? ()
No symbol table info available.
(gdb) list
1 libc-start.c: No such file or directory.
        in libc-start.c
(gdb)

Expected: Update of packages.
Observed: Segmentation fault.