bin/48241: ntpd is confused by detached v6 address

[martin%NetBSD.org@localhost]

>Number:         48241
>Category:       bin
>Synopsis:       ntpd is confused by detached v6 address
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Sep 24 20:00:01 +0000 2013
>Originator:     Martin Husemann
>Release:        NetBSD 6.99.23
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD night-owl.duskware.de 6.99.23 NetBSD 6.99.23 (NIGHT-OWL) #202: 
Fri Sep 20 19:59:50 CEST 2013 
martin%night-owl.duskware.de@localhost:/usr/src/sys/arch/amd64/compile/NIGHT-OWL
 amd64
Architecture: x86_64
Machine: amd64
>Description:

My bge0 interface is currently not wired. It gets a detached IPv6 link local
address:

bge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
[..]
        media: Ethernet autoselect (none)
        status: no carrier
        inet6 fe80::226:2dff:fe90:46d1%bge0 prefixlen 64 detached scopeid 0x1

ntpd tries to use this interface and logs (lots of!):

Sep 24 21:36:24 night-owl ntpd[529]: bind(29) AF_INET6 
fe80::226:2dff:fe90:46d1%1#123 flags 0x11 failed: Can't assign requested address
Sep 24 21:36:24 night-owl ntpd[529]: unable to create socket on bge0 (47) for 
fe80::226:2dff:fe90:46d1#123
Sep 24 21:36:24 night-owl ntpd[529]: failed to init interface for address 
fe80::226:2dff:fe90:46d1


>How-To-Repeat:

Run ntpd in default config on a machine with ip6mode=autohost and disconnected
network cable.

>Fix:
n/a