#0  0x00007f8ac7ddf629 in free () from /lib/libc.so.6
No symbol table info available.
#1  0x00007f8ac80d6113 in usb_destroy_configuration ()
   from /lib/libusb-0.1.so.4
No symbol table info available.
#2  0x00007f8ac80d58c9 in usb_free_dev () from /lib/libusb-0.1.so.4
No symbol table info available.
#3  0x00007f8ac80d5cd6 in usb_find_devices () from /lib/libusb-0.1.so.4
No symbol table info available.
#4  0x000000000040cd47 in ?? ()
No symbol table info available.
#5  0x00007f8ac85d4037 in g_type_create_instance ()
   from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#6  0x00007f8ac85b7dac in ?? () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#7  0x00007f8ac85b87be in g_object_newv () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#8  0x00007f8ac85b9345 in g_object_new_valist ()
   from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#9  0x00007f8ac85b949c in g_object_new () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#10 0x000000000040804d in ?? ()
No symbol table info available.
#11 0x000000000040829e in ?? ()
No symbol table info available.
#12 0x0000000000413405 in ?? ()
No symbol table info available.
#13 0x00007f8ac7d83abd in __libc_start_main () from /lib/libc.so.6
No symbol table info available.
#14 0x0000000000405b39 in ?? ()
No symbol table info available.
#15 0x00007fff55d9b418 in ?? ()
No symbol table info available.
#16 0x000000000000001c in ?? ()
No symbol table info available.
#17 0x0000000000000001 in ?? ()
No symbol table info available.
#18 0x00007fff55d9bf1c in ?? ()
No symbol table info available.
#19 0x0000000000000000 in ?? ()
No symbol table info available.