.
Thread 4 (LWP 31987):
#0  0x00007f307c838753 in ?? ()
No symbol table info available.
#1  0x0000000000a2bb60 in ?? ()
No symbol table info available.
#2  0x00000000ffffffff in ?? ()
No symbol table info available.
#3  0x0000000000000001 in ?? ()
No symbol table info available.
#4  0x0000000000a355f0 in ?? ()
No symbol table info available.
#5  0x0000000000000001 in ?? ()
No symbol table info available.
#6  0x00007f307cb497a6 in ?? ()
No symbol table info available.
#7  0x0000000000a2bb60 in ?? ()
No symbol table info available.
#8  0xffffffff7fffffff in ?? ()
No symbol table info available.
#9  0x0000000000000001 in ?? ()
No symbol table info available.
#10 0x0000000000a2be00 in ?? ()
No symbol table info available.
#11 0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 3 (LWP 31990):
#0  0x00007f307e2f63cb in ?? ()
No symbol table info available.
#1  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (LWP 31984):
#0  0x00007f307c838753 in ?? ()
No symbol table info available.
#1  0x0000000000a1c1a0 in ?? ()
No symbol table info available.
#2  0x00000000ffffffff in ?? ()
No symbol table info available.
#3  0x0000000000000005 in ?? ()
No symbol table info available.
#4  0x0000000000a39430 in ?? ()
No symbol table info available.
#5  0x0000000000000001 in ?? ()
No symbol table info available.
#6  0x00007f307cb497a6 in ?? ()
No symbol table info available.
#7  0x0000000000a1c1a0 in ?? ()
No symbol table info available.
#8  0xffffffff7fffffff in ?? ()
No symbol table info available.
#9  0x0000000000000001 in ?? ()
No symbol table info available.
#10 0x0000000000a1c150 in ?? ()
No symbol table info available.
#11 0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (LWP 31976):
#0  0x00007f307cb507ab in ?? ()
No symbol table info available.
#1  0x0000000000000000 in ?? ()
No symbol table info available.