port-zaurus/38820: Falling into ddb in the process of sysinst .

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>Number:         38820
>Category:       port-zaurus
>Synopsis:       Falling into ddb in the process of sysinst .
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    port-zaurus-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jun 01 18:00:00 +0000 2008
>Originator:     Tetsuya Okazaki
>Release:        NetBSD-current 4.99.63
>Organization:
None.
>Environment:
NetBSD/zaurus -current 4.99.63
NetBSD-daily/HEAD/200805300002Z/zaurus/binary/kernel/netbsd-INSTALL

>Description:
ftp://ftp.NetBSD.org/NetBSD-daily/HEAD/200805300002Z/zaurus/binary/kernel/netbsd-INSTALL.gz

I got NetBSD/zaurus install-kernel above , and tried to install with 
sysinst.
But, sysinst dropped into debugger in the process of mounting 
targetroot.
The error messages is below .
-----
Status: Running
Command:/sbin/mount -tffs -o async /dev/wd0a /targetroot/

panic: kernel diagnostic assertion "bp->b_vp == NULL || bp->b_vp->v_tag 
!= VT_UFS || ISSET(bp->b_flags, B_COWDONE)" failed: file 
"/home/build/ab/HEAD/src/sys/kern/vfs_bio.c", line 887
Sttopped in pid 13.1 (moount_ffs) at    0xc03d8cc8:     bx      r14
db>
------
Thanks.

>How-To-Repeat:

>Fix: