.
Thread 4 (Thread 0x7fc900e07700 (LWP 6270)):
#0  0x00007fc90b5da901 in __GI___poll (fds=0x7fc8fc007dd0, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
        resultvar = 18446744073709551100
        sc_cancel_oldtype = 0
#1  0x00007fc90c2cc169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc90c2cc27c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc90c2cc2c1 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fc90c2f3645 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc90b2ba7fc in start_thread (arg=0x7fc900e07700) at pthread_create.c:465
        pd = 0x7fc900e07700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140501279864576, -3299201355490984113, 140501288253006, 140501288253007, 140501279864576, 140501279865280, 3289000021778300751, 3289025823939034959}, 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  0x00007fc90b5e6b0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
.
Thread 3 (Thread 0x7fc8fbfff700 (LWP 6271)):
#0  0x00007fc90b5da901 in __GI___poll (fds=0x7fc8fc01d930, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
        resultvar = 18446744073709551100
        sc_cancel_oldtype = 0
#1  0x00007fc90c2cc169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc90c2cc502 in g_main_loop_run () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc90c8b5b26 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fc90c2f3645 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc90b2ba7fc in start_thread (arg=0x7fc8fbfff700) at pthread_create.c:465
        pd = 0x7fc8fbfff700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140501198042880, -3299201355490984113, 140501288253390, 140501288253391, 140501198042880, 140501198043584, 3289622409784131407, 3289025823939034959}, 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  0x00007fc90b5e6b0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
.
Thread 2 (Thread 0x7fc901608700 (LWP 6269)):
#0  0x00007fc90b5da901 in __GI___poll (fds=0x55c1a202a280, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
        resultvar = 18446744073709551100
        sc_cancel_oldtype = 0
#1  0x00007fc90c2cc169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc90c2cc27c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc90161046d in  () at /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
#4  0x00007fc90c2f3645 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc90b2ba7fc in start_thread (arg=0x7fc901608700) at pthread_create.c:465
        pd = 0x7fc901608700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140501288257280, -3299201355490984113, 140729807023358, 140729807023359, 140501288257280, 140501288257984, 3289003320850054991, 3289025823939034959}, 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  0x00007fc90b5e6b0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
.
Thread 1 (Thread 0x7fc90e32cac0 (LWP 6268)):
#0  0x00007fc90bd5a257 in XGetScreenSaver () at /usr/lib/x86_64-linux-gnu/libX11.so.6
#1  0x000055c1a1741d2e in  ()
#2  0x00007fc90c2cc8a3 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc90c2cbe25 in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fc90c2cc1f0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc90c2cc502 in g_main_loop_run () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fc90d3da725 in gtk_main () at /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
#7  0x000055c1a17408f7 in main ()