Assertion failure on net.box connect to secure IPROTO

Tarantool version 2.11.2-107-g42654e2e8, debug build

Use the following script to reproduce:

box.cfg { listen = 'localhost:3301?transport=ssl&ssl_key_file=./test/ssl-luatest/certs/ca-sign-key.key&ssl_cert_file=./test/ssl-luatest/certs/ca-sign-cert.crt' }
require'net.box'.connect('localhost:3301')