bin/54312: gpt core dump

[Thomas Klausner <wiz%NetBSD.org@localhost>]

>Number:         54312
>Category:       bin
>Synopsis:       gpt core dump
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jun 19 19:50:00 +0000 2019
>Originator:     Thomas Klausner
>Release:        NetBSD 8.99.46
>Organization:
Curiosity is the very basis of education and if you tell me that
curiosity killed the cat, I say only that the cat died nobly.
- Arnold Edinborough
>Environment:
	
	
Architecture: x86_64
Machine: amd64
-current as of today
>Description:
gpt dumps core in the following case.
>How-To-Repeat:
# gpt biosboot dk0
gpt: /dev/rld0: map entry doesn't fit media: new start + new size < start + size
(22 + 74706d4b < 22 + 74706d6d)
Memory fault (core dumped)

The backtrace is:
gpt_close()
cmd_biosboot()
main()
>Fix:
Not provided.

>Unformatted: