Application: polkit-kde-authentication-agent-1 (0.99.0)
KDE Platform Version: 4.6.3 (4.6.3) (Compiled from sources)
Qt Version: 4.7.3
Operating System: Linux 2.6.38-gentoo-r5 x86_64
Distribution: "Gentoo Base System release 2.0.2"

-- Information about the crash:
- What I was doing when the application crashed:

Logining in.

I have tried remerging all packages , revdep-rebuild etc, everything appears sane, but this continues to happen every login.

I have enabled the CONFIG_AUDITSYSCALL option in kernel as i read that it may be related but no change.

The crash can be reproduced every time.

-- Backtrace:
Application: PolicyKit1-KDE (polkit-kde-authentication-agent-1), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f91edb2c760 (LWP 3052))]

Thread 2 (Thread 0x7f91d691b700 (LWP 3088)):
#0  0x00007f91eb01fede in __lll_lock_wait_private () from /lib64/libc.so.6
#1  0x00007f91eafba908 in _L_lock_6671 () from /lib64/libc.so.6
#2  0x00007f91eafb8cf1 in free () from /lib64/libc.so.6
#3  0x00007f91e89937be in g_source_callback_unref () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f91e8993f01 in g_source_destroy_internal () from /usr/lib64/libglib-2.0.so.0
#5  0x00007f91e8994363 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#6  0x00007f91e89989b8 in g_main_context_iterate () from /usr/lib64/libglib-2.0.so.0
#7  0x00007f91e8998ec5 in g_main_loop_run () from /usr/lib64/libglib-2.0.so.0
#8  0x00007f91e8499a64 in gdbus_shared_thread_func () from /usr/lib64/libgio-2.0.so.0
#9  0x00007f91e89bdf34 in g_thread_create_proxy () from /usr/lib64/libglib-2.0.so.0
#10 0x00007f91e9107c1a in start_thread () from /lib64/libpthread.so.0
#11 0x00007f91eb0132cd in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f91edb2c760 (LWP 3052)):
[KCrash Handler]
#6  0x00007f91eafb426d in malloc_consolidate () from /lib64/libc.so.6
#7  0x00007f91eafb66d4 in _int_malloc () from /lib64/libc.so.6
#8  0x00007f91eafb9966 in _int_realloc () from /lib64/libc.so.6
#9  0x00007f91eafb9eb0 in realloc () from /lib64/libc.so.6
#10 0x00007f91ec335d4b in QString::realloc(int) () from /usr/lib64/qt4/libQtCore.so.4
#11 0x00007f91ec33618f in QString::append(QString const&) () from /usr/lib64/qt4/libQtCore.so.4
#12 0x00007f91ec389d87 in QTextStreamPrivate::putString(QString const&, bool) () from /usr/lib64/qt4/libQtCore.so.4
#13 0x00007f91ec385b66 in QTextStream::operator<<(QString const&) () from /usr/lib64/qt4/libQtCore.so.4
#14 0x00007f91ece9666d in PolkitQt1::Agent::Listener::registerListener(PolkitQt1::Subject const&, QString const&) () from /usr/lib64/libpolkit-qt-agent-1.so.1
#15 0x000000000040992c in PolicyKitKDE::PolicyKitKDE() ()
#16 0x000000000040bd90 in main ()

Reported using DrKonqi