[pkg-wpa-devel] Bug#820055: wpa_cli interface_add/interface_remove interface_name fails with "UNKNOWN COMMAND"

[Pičugins Arsenijs]

Package: wpa
Version: 2.3

I want to use wpa_cli to add/remove a wireless interface to a running wpa_supplicant instance. I try to use "wpa_cli interface_add wlan1" and it prints out "UNKNOWN COMMAND". Same if I use wpa_cli command line. If I use "interface_add" without arguments, it asks me to use at least one argument. If I use "wpa_cli interface_list", it doesn't print out any interface (which is weird, since "wpa_cli interface" prints an interface which was supplied to wpa_supplicant by /etc/network/interfaces using wpa_conf directive).
I grepped through wpa 2.3 source and this message appears in wpa_supplicant ctrl_iface.c file, but I can't quite figure out what are the circumstances when it is returned as a reply.

I am using Debian GNU/Linux 8.0, kernel 4.1.19-v7+ and glibc6 2.4. It's Raspbian, if that's important. I can check it on a Debian PC if necessary.