got hit the same, suddenly. Stacktrace matches this one. After downloading libc6 debugging symbols, and running apport-retrace I get the following:
Stacktrace: Using host libthread_db library "/lib/libthread_db.so.1". Core was generated by `gnome-panel --sm-config-prefix /gnome-panel-FiPRVZ/ --sm-client-id 117f00000100'. Program terminated with signal 11, Segmentation fault. #0 0x00002aff2c449d15 in _int_malloc () from /lib/libc.so.6 #0 0x00002aff2c449d15 in _int_malloc () from /lib/libc.so.6 #1 0x00002aff2c44b99d in malloc () from /lib/libc.so.6 #2 0x00002aff2a16ed25 in _gdk_xsettings_setting_copy () from /usr/lib/libgdk-x11-2.0.so.0 #3 0x00002aff2a16e72f in _gdk_xsettings_client_get_setting () from /usr/lib/libgdk-x11-2.0.so.0 #4 0x00002aff2a1531e7 in gdk_screen_get_setting () from /usr/lib/libgdk-x11-2.0.so.0 #5 0x00002aff29d108c2 in ?? () from /usr/lib/libgtk-x11-2.0.so.0 #6 0x00002aff2b5846c2 in IA__g_object_get_valist (object=0x6cf280, first_property_name=<value optimized out>, var_args=0x7fff827edfe0) at gobject.c:659 value = {g_type = 64, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}} pspec = (GParamSpec *) 0x2aff2c7269f0 error = <value optimized out> name = $1 = -99 . Full report is available if needed. -- [apport] gnome-panel crashed with SIGSEGV in ??() https://launchpad.net/bugs/81723 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs