.
Thread 4 (LWP 6663):
#0  0x00007fc8929d53cd in ?? ()
No symbol table info available.
#1  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 3 (LWP 6630):
#0  0x00007fc8929d53cd in ?? ()
No symbol table info available.
#1  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (LWP 6715):
#0  0x00007fc8929d53cd in ?? ()
No symbol table info available.
#1  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (LWP 6593):
#0  0x00007fc8934501e9 in ?? ()
No symbol table info available.
#1  0x0000000000c537b0 in ?? ()
No symbol table info available.
#2  0x0000000000000071 in ?? ()
No symbol table info available.
#3  0x0000000000000000 in ?? ()
No symbol table info available.