aptitude crashed with SIGSEGV in _int_free()

Binary package hint: aptitude

Aptitude crashes regularly shortly before termination. For example "aptitude changelog kmail" crashed on my today. Or "aptitude update" crashes sometimes (but not always) after performing the update.

ProblemType: Crash
Architecture: amd64
Date: Fri Mar 26 09:28:21 2010
DistroRelease: Ubuntu 10.04
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/aptitude
NonfreeKernelModules: nvidia
Package: aptitude 0.4.11.11-1ubuntu9
ProcCmdline: aptitude changelog kmail
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=de_DE.UTF-8
 LANGUAGE=
ProcVersionSignature: Ubuntu 2.6.32-17.26-generic 2.6.32.10+drm33.1
SegvAnalysis:
 Segfault happened at: 0x7f236c7ba392 <_int_free+674>: cmp 0x18(%r15),%r12
 PC (0x7f236c7ba392) ok
 source "0x18(%r15)" (0x2020202020202038) not located in a known VMA region (needed readable region)!
 destination "%r12" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: aptitude
StacktraceTop:
 _int_free (av=0x7f236cabde40, p=0xc10460)
 *__GI___libc_free (mem=<value optimized out>)
 ?? ()
 ?? ()
 ?? ()
Title: aptitude crashed with SIGSEGV in _int_free()
Uname: Linux 2.6.32-17-generic x86_64
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare