this seems to be a duplicate of bug#591470 i can confirm that the fix offered there (adding -nodefaults) fixes the stdio misbehaviour reported here.
but additionlly one has to add -net user -net nic as i reported in bug#597102 -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org