Distributor ID: Ubuntu
Description:    Ubuntu 16.04.2 LTS
Release:    16.04
Codename:   xenial
Kernel:     4.4.0-72-generic

avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00

error: ‘struct usb_serial_port’ has no member named ‘number’
dbg_ch34x("%s - port:%d", __func__, port->number);