.
Thread 3 (LWP 11895):
#0  0x00007f66c43dc414 in ?? ()
No symbol table info available.
#1  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (LWP 11894):
#0  0x00007f66c43dc414 in ?? ()
No symbol table info available.
#1  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (LWP 11893):
#0  0x00007f66c5ba6cc9 in ?? ()
No symbol table info available.
#1  0x00007f66c5baa0d8 in ?? ()
No symbol table info available.
#2  0x0000000000000020 in ?? ()
No symbol table info available.
#3  0x0000000000000000 in ?? ()
No symbol table info available.