synaptic crashed with SIGSEGV in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::compare()

[Per-Inge]

This happened in a fresh installation of daily build 21/7 just updated from the main server, when the Software Center was started.
"lightdm-example-gtk-greeter" and "update-apt-xapian-index" crashed at the same time.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: synaptic 0.75.2ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-6.7-generic 3.0.0-rc7
Uname: Linux 3.0.0-6-generic x86_64
Architecture: amd64
Date: Sun Jul 24 08:17:13 2011
ExecutablePath: /usr/sbin/synaptic
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110721)
ProcCmdline: /usr/sbin/synaptic
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f6a45b5c601: pcmpeqb (%rax),%xmm0
 PC (0x7f6a45b5c601) ok
 source "(%rax)" (0x7f6a372a85f0) not located in a known VMA region (needed readable region)!
 destination "%xmm0" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: synaptic
StacktraceTop:
 ?? () from /lib/x86_64-linux-gnu/libc.so.6
 std::basic_string<char, std::char_traits<char>, std::allocator<char> >::compare(char const*) const () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
 pkgCacheGenerator::FinishCache(OpProgress*) () from /usr/lib/libapt-pkg.so.4.10
 pkgCacheGenerator::MakeStatusCache(pkgSourceList&, OpProgress*, MMap**, bool) () from /usr/lib/libapt-pkg.so.4.10
 ?? ()
Title: synaptic crashed with SIGSEGV in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::compare()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:43
 std::basic_string<char, std::char_traits<char>, std::allocator<char> >::compare(char const*) const () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
 pkgCacheGenerator::MergeList(pkgCacheGenerator::ListParser&, pkgCache::VerIterator*) () from /usr/lib/libapt-pkg.so.4.10
 ?? ()
 ?? ()