(gdb) bt
#0  0x00007f7142bd3267 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55
#1  0x00007f7142bd4eca in __GI_abort () at abort.c:89
#2  0x00007f71431df06d in __gnu_cxx::__verbose_terminate_handler() () at /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#3  0x00007f71431dcee6 in  () at /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#4  0x00007f71431dcf31 in  () at /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#5  0x00007f7143238ec1 in  () at /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#6  0x00007f7141d4b6aa in start_thread (arg=0x7f7127fff700) at pthread_create.c:333
#7  0x00007f7142ca4eed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109