#0  0x00007fdf10af7405 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007fdf10afab6b in ?? () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#2  0x0000000000000000 in ?? ()
No symbol table info available.