install/46812: sysinst stops with "openpty() failed" on netbsd-6/sparc

[isaki%pastel-flower.jp@localhost]

>Number:         46812
>Category:       install
>Synopsis:       sysinst stops with "openpty() failed" on netbsd-6/sparc
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    install-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Aug 18 03:40:00 +0000 2012
>Originator:     Tetsuya Isaki
>Release:        NetBSD 6.0_BETA2/sparc
>Organization:
NetBSD
>Environment:
N/A
>Description:
On NetBSD-6.0_BETA2/sparc (cvs up about 2012/08/16),
sysinst stops with the following error message.

--------------------------------------------------------------------------------
     Status: openpty() failed
    Command: disklabel -w -r -f /tmp/disktab sd0 'QEMU HARDDISK  '
     Hit enter to continue
--------------------------------------------------------------------------------

I tried it on QEMU 0.13,
% qemu-system-sparc -nographic -boot d \
 -hda sparc.img -cdrom NetBSD-6.0_BETA2-sparc.iso

>How-To-Repeat:
As above.
>Fix:
N/A