.
Thread 7 (Thread 0x7f1a1c34a700 (LWP 5242)):
#0  0x00007f1a1ba3439d in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f1a12e91986 in ?? () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#2  0x00007f1a12e935cf in VBoxNsprPR_Poll () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#3  0x00007f19fe1a65eb in ?? () from /usr/lib/virtualbox/components/VBoxXPCOMIPCC.so
No symbol table info available.
#4  0x00007f1a12e95413 in ?? () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#5  0x00007f1a1b6030dc in ?? () from /usr/lib/virtualbox/VBoxRT.so
No symbol table info available.
#6  0x00007f1a1b67ae6c in ?? () from /usr/lib/virtualbox/VBoxRT.so
No symbol table info available.
#7  0x00007f1a1bf150a5 in start_thread (arg=0x7f1a1c34a700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1a1c34a700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139750119089920, -2103600293447910656, 0, 0, 139750119090624, 139750119089920, 2088186730663459584, 2088180728406424320}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#8  0x00007f1a1ba3e84d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.
.
Thread 6 (Thread 0x7f1a1c31d740 (LWP 5225)):
#0  0x00007f1a12e28ce1 in ?? () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#1  0x00007f1a12e22e5c in nsACString::~nsACString() () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#2  0x00007f1a12e576fa in ?? () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#3  0x00007f1a12e962c0 in nsCOMPtr_base::~nsCOMPtr_base() () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#4  0x00007f1a12e4535d in ?? () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#5  0x00007f1a12e391c0 in nsSupportsArray::Clear() () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#6  0x00007f1a12e39b11 in nsSupportsArray::DeleteArray() () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#7  0x00007f1a12e39b51 in nsSupportsArray::~nsSupportsArray() () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#8  0x00007f1a12e39b82 in nsSupportsArray::Release() () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#9  0x00007f1a12e962c0 in nsCOMPtr_base::~nsCOMPtr_base() () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#10 0x00007f1a12e484d3 in ?? () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#11 0x00007f1a12e48526 in ?? () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#12 0x00007f1a12e99e62 in VBoxNsxpNS_ShutdownXPCOM () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#13 0x00007f1a1426e754 in ?? () from /usr/lib/virtualbox/VirtualBox.so
No symbol table info available.
#14 0x00007f1a13fdfcec in ?? () from /usr/lib/virtualbox/VirtualBox.so
No symbol table info available.
#15 0x00007f1a1401a2a4 in ?? () from /usr/lib/virtualbox/VirtualBox.so
No symbol table info available.
#16 0x00007f1a14244335 in ?? () from /usr/lib/virtualbox/VirtualBox.so
No symbol table info available.
#17 0x00007f1a12a83a7a in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#18 0x00007f1a12a73fc5 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
No symbol table info available.
#19 0x00007f1a13faf272 in TrustedMain () from /usr/lib/virtualbox/VirtualBox.so
No symbol table info available.
#20 0x00007f1a1b965ec5 in __libc_start_main (main=0x401130, argc=6, argv=0x7fff3b7028c8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff3b7028b8) at libc-start.c:287
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -2103600293447910656, 4198843, 140734190594240, 0, 0, 2103449641294052096, 2088180943219800832}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x4046f0, 0x7fff3b7028c8}, data = {prev = 0x0, cleanup = 0x0, canceltype = 4212464}}}
        not_first_call = <optimized out>
#21 0x00000000004011e4 in ?? ()
No symbol table info available.
.
Thread 5 (Thread 0x7f1a04041700 (LWP 5243)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
No locals.
#1  0x00007f1a12e9468f in VBoxNsprPR_WaitCondVar () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#2  0x00007f1a12e9491f in VBoxNsprPR_Wait () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#3  0x00007f19fe1a3735 in ?? () from /usr/lib/virtualbox/components/VBoxXPCOMIPCC.so
No symbol table info available.
#4  0x00007f1a12e6a82d in ?? () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#5  0x00007f1a12e95413 in ?? () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#6  0x00007f1a1b6030dc in ?? () from /usr/lib/virtualbox/VBoxRT.so
No symbol table info available.
#7  0x00007f1a1b67ae6c in ?? () from /usr/lib/virtualbox/VBoxRT.so
No symbol table info available.
#8  0x00007f1a1bf150a5 in start_thread (arg=0x7f1a04041700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1a04041700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139749713254144, -2103600293447910656, 0, 0, 139749713254848, 139749713254144, 2088133821498211072, 2088180728406424320}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#9  0x00007f1a1ba3e84d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.
.
Thread 4 (Thread 0x7f1a04fff700 (LWP 5238)):
#0  0x00007f1a1ba3439d in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f1a0f68bea4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f1a0f68c232 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f1a0a857f06 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
No symbol table info available.
#4  0x00007f1a0f6b28e5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f1a1bf150a5 in start_thread (arg=0x7f1a04fff700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1a04fff700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139749729761024, -2103600293447910656, 0, 0, 139749729761728, 139749729761024, 2088134563453811456, 2088180728406424320}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#6  0x00007f1a1ba3e84d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.
.
Thread 3 (Thread 0x7f1a0628d700 (LWP 5237)):
#0  0x00007f1a1ba3439d in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f1a0f68bea4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f1a0f68bfbc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f1a062951ad in ?? () from /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
No symbol table info available.
#4  0x00007f1a0f6b28e5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f1a1bf150a5 in start_thread (arg=0x7f1a0628d700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f1a0628d700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139749749217024, -2103600293447910656, 0, 0, 139749749217728, 139749749217024, 2088138591059393280, 2088180728406424320}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#6  0x00007f1a1ba3e84d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.
.
Thread 2 (Thread 0x7f19ffbb1700 (LWP 5239)):
#0  0x00007f1a1ba3439d in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f1a0f68bea4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f1a0f68bfbc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f1a0f68bff9 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0x00007f1a0f6b28e5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f1a1bf150a5 in start_thread (arg=0x7f19ffbb1700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f19ffbb1700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139749641361152, -2103600293447910656, 0, 0, 139749641361856, 139749641361152, 2088964184705415936, 2088180728406424320}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#6  0x00007f1a1ba3e84d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.
.
Thread 1 (Thread 0x7f19fca32700 (LWP 5247)):
#0  0x00007f1a12e2ecfe in ?? () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#1  0x00007f19fe1a1281 in ?? () from /usr/lib/virtualbox/components/VBoxXPCOMIPCC.so
No symbol table info available.
#2  0x00007f1a12e7601a in ?? () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#3  0x00007f1a12e75487 in ?? () from /usr/lib/virtualbox/VBoxXPCOM.so
No symbol table info available.
#4  0x00007f19c8000e00 in ?? ()
No symbol table info available.
#5  0x00007f19fca31abc in ?? ()
No symbol table info available.
#6  0x0000000000000001 in ?? ()
No symbol table info available.
#7  0x00007f19c8000cd0 in ?? ()
No symbol table info available.
#8  0x0000000000000000 in ?? ()
No symbol table info available.