misc/185449: Installer creates multiple freebsd-boot partitions

[Peter K]

>Number:         185449
>Category:       misc
>Synopsis:       Installer creates multiple freebsd-boot partitions
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Jan 03 16:50:00 UTC 2014
>Closed-Date:
>Last-Modified:
>Originator:     Peter K
>Release:        10.0-RC4
>Organization:
>Environment:
10.0-RC4 FreeBSD 10.0-RC4 #0 r260130: Tue Dec 31 17:10:01 UTC 2013     root at snap.freebsd.org:/usr/obj/usr/src/sys/GENERIC  amd64
>Description:
:#gpart show ada0
=>        34  3907029101  ada0  GPT  (1.8T)
          34         128     1  freebsd-boot  (64K)
         162     8388608     2  freebsd-ufs  (4.0G)
     8388770    20971520     3  freebsd-swap  (10G)
    29360290  3877668844     4  freebsd-ufs  (1.8T)
  3907029134           1        - free -  (512B)

ada0p2 had FreeBSD 9 amd64 on it, installing FreeBSD 10 RC4 amd64 to ada0p2
ada0p4 is my 'data' partition left untouched.

During install if I delete my OS partition [ada0p2], then create partition, the installer complains that I'm missing freebsd-boot even though ada0p1 is never touched - I have two options, let it create or "ignore";

If I say create, then I have two 'freebsd-boot' partitions
If I say ignore, I did not test of it will still use the original 'ada0p1' freebsd-boot partition, but there should still be no error.

 I had to delete both ada0p1 and ada0p2, and then the installer correctly created freebsd-boot on ada0p1 and freebsd-ufs on ada0p2.

Any way to get the installer to detect an already existing freebsd-boot partition to use?  This threw me off for a second only, but I can see where many will say 'create' and will have a new freebsd-boot partition created on each reinstall.
>How-To-Repeat:
Start install on an already existing system using GPT.
Delete only partition where you want to install, create new partition.
>Fix:
Installer should detect if 'freebsd-boot' partition already exists and use that [?]

>Release-Note:
>Audit-Trail:
>Unformatted: