bin/56249: ``dump -[Ww]'' exits on missing NAME=label

[paul%whooppee.com@localhost]

>Number:         56249
>Category:       bin
>Synopsis:       ``dump -[Ww]'' exits on missing NAME=label
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jun 15 16:00:00 +0000 2021
>Originator:     Paul Goyette
>Release:        NetBSD 9.99.84
>Organization:
+--------------------+--------------------------+----------------------+
| Paul Goyette       | PGP Key fingerprint:     | E-mail addresses:    |
| (Retired)          | FA29 0E3B 35AF E8AE 6651 | paul%whooppee.com@localhost    |
| Software Developer | 0786 F758 55DE 53BA 7731 | pgoyette%netbsd.org@localhost  |
|                    |                          | pgoyette99%gmail.com@localhost |
+--------------------+--------------------------+----------------------+
>Environment:
	
	
System: NetBSD speedy.whooppee.com 9.99.84 NetBSD 9.99.84 (SPEEDY 2021-06-09 18:05:06 UTC) #0: Wed Jun 9 20:58:57 UTC 2021 paul%speedy.whooppee.com@localhost:/build/netbsd-local/obj/amd64/sys/arch/amd64/compile/SPEEDY amd64
Architecture: x86_64
Machine: amd64
>Description:
	
The dump(8) command, with the -w or -W command line option, fails "hard"
if there is a line in /etc/fstab with NAME=label in the first field and
no partition currently exists with that name.  This causes the entire
scan for filesystem-needs-dump to abort, rather than reporting on the
remaining partitions.

Note that if the partition is specified as /dev/sd0 the operation will
succeed even if the specified device does not exist.  It would be
useful if dump(8) would treat a missing NAME=label similarly.
>How-To-Repeat:
	
See above.
>Fix:
Please
	

>Unformatted: