.
Thread 3 (Thread 4605):
#0  0x00007f7d462a7f18 in sigwait () from /lib/libpthread.so.0
#1  0x0000000000442ace in ?? ()
#2  0x00007f7d4629fa04 in start_thread () from /lib/libpthread.so.0
#3  0x00007f7d460095fd in clone () from /lib/libc.so.6
#4  0x0000000000000000 in ?? ()
.
Thread 2 (Thread 4606):
#0  0x00007f7d462a482d in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#1  0x0000000000443a39 in ?? ()
#2  0x0000000000431295 in ?? ()
#3  0x000000000043702f in ?? ()
#4  0x0000000000442bb8 in ?? ()
#5  0x0000000000442c98 in ?? ()
#6  0x00007f7d4629fa04 in start_thread () from /lib/libpthread.so.0
#7  0x00007f7d460095fd in clone () from /lib/libc.so.6
#8  0x0000000000000000 in ?? ()
.
Thread 1 (Thread 4604):
#0  0x00007f7d45f5d4e5 in raise () from /lib/libc.so.6
#1  0x00007f7d45f60f80 in abort () from /lib/libc.so.6
#2  0x00007f7d45f564a1 in __assert_fail () from /lib/libc.so.6
#3  0x0000000000443782 in ?? ()
#4  0x000000000041b9cf in ?? ()
#5  0x00000000004386bd in ?? ()
#6  0x000000000040d224 in ?? ()
#7  0x000000000040d28e in ?? ()
#8  0x00007f7d46ca3fae in _XIOError () from /usr/lib/libX11.so.6
#9  0x00007f7d46cab9a5 in ?? () from /usr/lib/libX11.so.6
#10 0x00007f7d46cac257 in _XEventsQueued () from /usr/lib/libX11.so.6
#11 0x00007f7d46c94f9d in XPending () from /usr/lib/libX11.so.6
#12 0x000000000041b2b6 in ?? ()
#13 0x00000000004397d3 in ?? ()
#14 0x0000000000407474 in ?? ()
#15 0x0000000000407ac5 in ?? ()
#16 0x0000000000442359 in ?? ()
#17 0x00000000004077b5 in ?? ()
#18 0x00007f7d45f48acd in __libc_start_main () from /lib/libc.so.6
#19 0x00000000004059b9 in ?? ()
#20 0x00007fff1ca32d98 in ?? ()
#21 0x000000000000001c in ?? ()
#22 0x0000000000000004 in ?? ()
#23 0x00007fff1ca34e44 in ?? ()
#24 0x00007fff1ca34e56 in ?? ()
#25 0x00007fff1ca34e5d in ?? ()
#26 0x00007fff1ca34e63 in ?? ()
#27 0x0000000000000000 in ?? ()