From bug 29113:

> content_new_remote_candidates_cb in gtalk-file-collection.c doesn't check
> nice_address_set_from_string() and skip the candidate if it failed. I'm not
> sure whether this is okay and libnice will reject the candidate itself later,
> or whether we'll all die.

Humm.. good question, I think we'll all die. I checked and libnice doesn't
check if the address is valid, I suppose it should. i'll fix libnice to check
if the address received is valid or not.