.
Thread 3 (Thread 0xb74e0b70 (LWP 1515)):
#0  0x00491416 in __kernel_vsyscall ()
No symbol table info available.
#1  0x005553ee in fchownat (fd=155162063, file=0x19 <Address 0x19 out of bounds>, owner=1051, group=1, flag=154886400) at ../sysdeps/unix/sysv/linux/i386/fchownat.c:93
        result = <optimized out>
        buf = 0x0
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
.
Thread 2 (Thread 0xb6449b70 (LWP 1516)):
#0  0x00491416 in __kernel_vsyscall ()
No symbol table info available.
#1  0x005553ee in fchownat (fd=14, file=0x1 <Address 0x1 out of bounds>, owner=15, group=1, flag=0) at ../sysdeps/unix/sysv/linux/i386/fchownat.c:93
        result = <optimized out>
        buf = 0x0
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
.
Thread 1 (Thread 0xb77a9880 (LWP 1458)):
#0  0x00bfae2e in sigc::signal_base::impl() const () from /tmp/tmp32t4cX/usr/lib/libsigc-2.0.so.0
No symbol table info available.
#1  0x00bfaf56 in sigc::signal_base::connect(sigc::slot_base const&) () from /tmp/tmp32t4cX/usr/lib/libsigc-2.0.so.0
No symbol table info available.
#2  0x08fa114a in connect (slot_=<optimized out>, this=<optimized out>) at /usr/include/sigc++-2.0/sigc++/signal.h:2661
No locals.
#3  UnityScreen::UnityScreen (this=0x97155b0, screen=0x92852f0) at /build/buildd/unity-4.8.2/plugins/unityshell/src/unityshell.cpp:148
        timer = {start_time_ = 132148333}
        pname = {static npos = <optimized out>, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0xbfbf4def "\t0L"}}
        old_handler = 0xbfbf4d70
        ubus = 0xbfbf4d70
        name = {static npos = <optimized out>, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x940b700 "\024"}}
        size = {mWidth = 5261645, mHeight = 134793300}
#4  0x08fa9106 in getInstance (base=<optimized out>) at /usr/include/compiz/core/pluginclasshandler.h:159
        pc = 0x97155b0
#5  PluginClassHandler<UnityScreen, CompScreen, 0>::get (base=0x92852f0) at /usr/include/compiz/core/pluginclasshandler.h:196
No locals.
#6  0x08fa929b in CompPlugin::VTableForScreenAndWindow<UnityScreen, UnityWindow>::initScreen (this=0x93c3248, s=0x92852f0) at /usr/include/compiz/core/plugin.h:232
        ps = <optimized out>
#7  0x08095c77 in CompScreen::initPluginForScreen (this=0xbfbf4f68, p=0xb666a204) at /build/buildd/compiz-0.9.5.92+bzr2791/src/plugin.cpp:340
        status = 168
        it = {_M_node = 0x943ffb8}
        fail = {_M_node = 0xbfbf4fa8}
        w = <optimized out>
#8  0x0808ab01 in CompOption::Value::set (this=0x943ffb8, s=0x943a454 "unityshell") at /build/buildd/compiz-0.9.5.92+bzr2791/src/option.cpp:165
No locals.
#9  0x080720c8 in _M_range_check (this=<optimized out>, __n=157774616) at /usr/include/c++/4.6/bits/stl_vector.h:718
No locals.
#10 at (__n=157774616, this=<optimized out>) at /usr/include/c++/4.6/bits/stl_vector.h:737
No locals.
#11 PrivateScreen::updatePlugins (this=0x93c1a00) at /build/buildd/compiz-0.9.5.92+bzr2791/src/screen.cpp:804
        p = <optimized out>
        j = 157774616
        pop = {<std::_List_base<CompPlugin*, std::allocator<CompPlugin*> >> = {_M_impl = {<std::allocator<std::_List_node<CompPlugin*> >> = {<__gnu_cxx::new_allocator<std::_List_node<CompPlugin*> >> = {<No data fields>}, <No data fields>}, _M_node = {_M_next = 0x60c400, _M_prev = 0xa4e0520}}}, <No data fields>}
        nPop = <optimized out>
        pListCount = 157774616
        __PRETTY_FUNCTION__ = "void PrivateScreen::updatePlugins()"
        i = 157774616
        pList = {<std::_Vector_base<CompOption::Value, std::allocator<CompOption::Value> >> = {_M_impl = {<std::allocator<CompOption::Value>> = {<__gnu_cxx::new_allocator<CompOption::Value>> = {<No data fields>}, <No data fields>}, _M_start = 0x28, _M_finish = 0x18, _M_end_of_storage = 0xa4e0518}}, <No data fields>}
        failedPush = <optimized out>
        list = @0xa4e04f8
#12 0x092ae990 in ?? ()
No symbol table info available.
Backtrace stopped: previous frame inner to this frame (corrupt stack?)