Thread 1 (process 14979):
#0  0x0000003089a05def in _Unwind_FindEnclosingFunction () from /lib64/libgcc_s.so.1
#1  0x0000003089a06867 in _Unwind_RaiseException () from /lib64/libgcc_s.so.1
#2  0x0000003089a0695c in _Unwind_ForcedUnwind () from /lib64/libgcc_s.so.1
#3  0x000000308980abc0 in __pthread_unwind () from /lib64/tls/libpthread.so.0
#4  0x0000003089805242 in sigcancel_handler () from /lib64/tls/libpthread.so.0
#5  <signal handler called>
#6  0x0000003087c2e8ab in sigaction () from /lib64/tls/libc.so.6
#7  0x0000003087c2e482 in ssignal () from /lib64/tls/libc.so.6
#8  <signal handler called>
#9  0x0000003087cbae62 in poll () from /lib64/tls/libc.so.6
#10 0x0000002a96638790 in ?? ()
#11 0x0000000000000000 in ?? ()