.
Thread 1 (Thread 0x7f563902d700 (LWP 1991)):
#0  0x00007f563796c445 in __GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        resultvar = 0
        pid = <optimized out>
        selftid = 1991
#1  0x00007f563796fbab in __GI_abort () at abort.c:91
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x18, sa_sigaction = 0x18}, sa_mask = {__val = {140008257357801, 16280960, 140008257216300, 1024, 0, 16280960, 4294967296, 16379904, 0, 154, 16280960, 16373536, 16379904, 154, 1, 0}}, sa_flags = 913328266, sa_restorer = 0}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f5636704dad in ?? ()
No symbol table info available.
#3  0x00007f563672ca45 in ?? ()
No symbol table info available.
#4  0x00007f5634a99360 in ?? ()
No symbol table info available.
#5  0x00007f563672ca45 in ?? ()
No symbol table info available.
#6  0x00007f563672b1ec in ?? ()
No symbol table info available.
#7  0x0000000000f994c0 in ?? ()
No symbol table info available.
#8  0x0000000000000000 in ?? ()
No symbol table info available.