[erlang-questions] IPv6 error, which one ?

[Pupeno]

Hello,
I am open a socket like this: 

gen_udp:listen(1234, [{active, once}, inet6])

so it effectively opens all the interfaces, IPv4 and IPv6. In a system where 
there's absolutely no support for IPv6, what happens ? Does it work anyway or 
do I get an error ? if so, what error ?
I want to know because I those cases I should fallback to:

gen_udp:listen(1234, [{active, once}, inet])

Thanks.
-- 
Pupeno <pupeno@REDACTED> (http://pupeno.com)
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