control: found -1 1:9.11.5.P4+dfsg-5.1 control: fixed -1 1:9.16.4-1 Thanks for the bug report. I can confirm this behaviour for Buster. I can also confirm that this behaviour has been fixed for 9.16 (in Bullseye) (apart from a missing newline)
$ host xn--linux-neuchtel-lhb.ch linux-neuchâtel.ch has address 193.72.186.6 linux-neuchâtel.ch has address 46.140.72.222 $ env LC_CTYPE=C host xn--linux-neuchtel-lhb.ch ;; Warning: cannot represent 'xn--linux-neuchtel-lhb.ch' in the current localexn--linux-neuchtel-lhb.ch has address 193.72.186.6 xn--linux-neuchtel-lhb.ch has address 46.140.72.222 $ env LC_CTYPE=C IDN_DISABLE=1 host xn--linux-neuchtel-lhb.ch xn--linux-neuchtel-lhb.ch has address 193.72.186.6 xn--linux-neuchtel-lhb.ch has address 46.140.72.222 Not sure whether we can backport this easily. The +noidnout suggestion is definitely bogus, that's dig style.