/server add test2 does-not-exist.weechat.org,www.weechat.org
/set weechat.network.connection_timeout 10
/set irc.server.test2.ipv6 off
/set irc.server.test2.autoreconnect on
/set irc.server.test2.autoreconnect_delay 10
/connect test2
# it will fail to connect to the first address as it doesn't exist,
# then try connecting to www.weechat.org (which ignores the attempt)
/set irc.server.test2.addresses irc.freenode.net

20:45:44   test2  -- | irc: connecting to server does-not-exist.weechat.org/6667...
20:45:44   test2 =!= | irc: address "does-not-exist.weechat.org" not found
20:45:44   test2 =!= | irc: error: Name or service not known
20:45:44   test2     | irc: switching address to www.weechat.org/6667
20:45:44   test2  -- | irc: connecting to server www.weechat.org/6667...
20:45:48 weechat     | Option changed: irc.server.test2.addresses = "irc.freenode.net"
20:45:49   test2 =!= | irc: timeout
20:45:49   test2  -- | irc: reconnecting to server in 5 seconds
20:45:54   test2  -- | irc: reconnecting to server...
20:45:54   test2 =!= | irc: unknown address server "test2", cannot connect
20:45:54   test2  -- | irc: reconnecting to server in 5 seconds
20:45:59   test2  -- | irc: reconnecting to server...
20:45:59   test2 =!= | irc: unknown address server "test2", cannot connect
20:45:59   test2  -- | irc: reconnecting to server in 5 seconds
20:46:04   test2  -- | irc: reconnecting to server...
20:46:04   test2 =!= | irc: unknown address server "test2", cannot connect
20:46:04   test2  -- | irc: reconnecting to server in 5 seconds
20:46:09   test2  -- | irc: reconnecting to server...
20:46:09   test2 =!= | irc: unknown address server "test2", cannot connect
20:46:09   test2  -- | irc: reconnecting to server in 5 seconds

This is failing because the index is "1" when retrying and it never gets set back to 0.